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Results from previous years

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2010 Beam Spot results at 7 TeV

Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. One can recognize a small tilt of the luminous region of 471μrad 15μrad. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(x) of about 45μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-xz10.gif
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Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(y) of about 70μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-yz10.gif
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Two dimensional distribution in the transverse plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size of about 45μm in x and 70μm in y with errors that are completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-yx10.gif
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Luminous centroid position in x over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-x.gif
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Luminous centroid position in y over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-y.gif
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Luminous centroid position in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-z.gif
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Luminous size in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-sigz.gif
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Alignment Performance with 2010 7 TeV Collisions data

Revision 402010-12-06 - PatrickJussel

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Public Inner Detector Plots for Collision Data

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2010 Beam Spot results at 7 TeV

Revision 392010-11-23 - DanielKollar

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Revision 382010-11-23 - DanielKollar

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Results from first collisions on 23 November 2009

Shift in z0 of tracks as a result of RF cogging.
This plot was made from the best quality collision candidates recorded by ATLAS on 23 November, and selecting tracks with at least 6 SCT hits, more than 10 TRT hits and |d0|<10mm (distance of closest approach to the nominal beam line). The distribution in red is for luminosity blocks LB<140 (before RF adjustment) and in blue for LB>145 (after RF adjustment). The shift in z0 is consistent with the 12cm expected from beam pick up measurements of the arrival times of the beams (cf. the beam pickup system plots).
TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png
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Scatter plot of hits on tracks in the first collision events. TRT hits are shown in blue, and SCT hits in red. The pixel detector was not switched on, and the SCT was running at reduced voltage. The solenoid magnetic field was zero, so tracks are straight. HitScatter23Nov.png
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Distribution of impact parameter, d0, of tracks in first collision events. d023Nov.png
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First results with stable beams at 900 GeV

Scatter plot of hits on barrel tracks in the first collision events with stable beams. TRT hits are shown in blue, SCT in red, and Pixel in green. The solenoid is at full field, and the curved tracks can clearly be seen in the TRT. InDetScatterPlot-141811-noframe.png
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Unbiased x residual distribution, integrated over all hits-on-tracks in the pixel barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. This result is achieved using the alignment constants calculated from cosmic ray samples. PIXX.png
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Unbiased x residual distribution, integrated over all hits-on-tracks in the SCT barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. This result is achieved using the alignment constants calculated from cosmic ray samples. SCTX.png
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X and Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_lg.gif
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X and Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_tr.gif
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X distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_x.gif
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Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_y.gif
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Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_z.gif
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The beam spot is determined from an unbinned maximum-likelihood (ML) fit to the distribution of selected primary vertices. The fit makes use of the estimated error on the position of each reconstructed vertex, allowing for a constant error scale factor. The fit can extract both the position and the size of the beam spot.
This series of six plots show the beam spot position during a run, as a function of time, where time is measured in Luminosity Blocks (each lasting approximately two minutes).

Beam spot stability - x position vs Luminosity Block

data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png
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Beam spot stability - y position vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png
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Beam spot stability - z position vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png
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Beam spot stability - x width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png
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Beam spot stability - y width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png
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Beam spot stability - z width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png
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First alignment update with collision data

During 2008 and 2009, a large sample of cosmic ray tracks was used to align the Inner Detector. Since these tracks tend to be vertical, they are much more useful for aligning the barrel than the end caps. After only a few days of collision data, the quality of the end cap alignment was dramatically improved, as shown in the following plots, where the position and orientation of end cap disks is updated. The most notable change is an improvement in the alignment residuals for SCT end cap C. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm and N(Pix+SCT)Hits>=6 is applied.

SCT barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A double Gaus fit is performed but only the mean and sigma of the narrower Gaussian are shown.

Approved_SCTBarResX.png
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SCT end-cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A single Gaussian fit is performed. Approved_SCTECAResX.png
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SCT end-cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A single Gaussian fit is performed. Approved_SCTECCResX.png
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Pixel barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A double Gaus fit is performed but only the mean and sigma of the narrower Gaussian are shown. Approved_PixBarResX.png
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Pixel end-cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A single Gaussian fit is performed. Approved_PixECAResX.png
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Pixel end-cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). A single Gaussian fit is performed. Approved_PixECCResX.png
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Refined alignment with December 2009 collision data

The ID alignment has been further improved by using the whole collision data taken in 2009. The validation plots below show the performance of the alignment which is used for the Feb10 reprocessing, using the following alignment tags:

Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.

PIXX_Apr2010.png
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel ECs for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.

PIXECX_Apr2010.png
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.

SCTX_Apr2010.png
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT ECs for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.

SCTECX_Apr2010.png
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2010 Beam Spot results at 7 TeV

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Beam Spot Results from December 2009

Two dimensional distribution in the x-z plane of primary vertices with at least 4 tracks per vertex for run 142193 at √s = 900GeV. These are the primary vertices used as input to the beam spot maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10 tracks per vertex (see below). The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz.gif
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Two dimensional distribution in the y-z plane of primary vertices with at least 4 tracks per vertex for run 142193 at √s = 900GeV. These are the primary vertices used as input to the beam spot maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10 tracks per vertex (see below). The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz.gif
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Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 142193 at √s = 900GeV. Compared to the figure above, the increased number of tracks per vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum likelihood fit is σ(x) = 200μm 1μm, the longitudinal size is σ(z) = 41.3mm 0.1mm. The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz10.gif
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Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 142193 at√ s = 900GeV. Compared to the figure above, the increased number of tracks per vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum likelihood fit is σ(y) = 279μm 1μm, the longitudinal size is σ(z) = 41.3mm 0.1mm. The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif
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Two dimensional distribution in the y-x plane of primary vertices with at least 10 tracks per vertex for run 142193 at √s = 900GeV. With the requirement of 10 tracks per vertex, the primary vertex resolution of about 100μm is sufficiently small so that the RMS widths are dominated by the luminous size. The transverse luminous sizes extracted from the maximum likelihood fit are σ(x) = 200μm 1μm and σ(y) = 279μm 1μm . Both the RMS widths of the transverse primary vertex distributions and the extracted transverse luminous sizes show that the average luminous size σ(y) is about 40% larger than σ(x). The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif
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Luminous centroid position in x over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-x.gif
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Luminous centroid position in y over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-y.gif
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Luminous centroid position in z over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-z.gif
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Luminous size σ(x) over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σ(x) decreased by about 20%. Errors are statistical only. 142193-sigx.gif
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Luminous size σ(y) over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σ(y) increased by about 20%. Errors are statistical only. 142193-sigy.gif
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Luminous size σ(z) over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only. 142193-sigz.gif
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Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 142308 at √s = 2.36TeV. Taking into account the degradation of the primary vertex resolution to about 135μm due to the SCT being off, one finds from the RMS width a slightly smaller luminous size σ(x) than at 900 GeV. The reduction in transverse width is much smaller than for σ(y). The longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from the maximum likelihood fit is σ(x) = 180μm 5μm, the longitudinal size is σ(z) = 27.0mm 0.4mm. (Taking the average luminous size from both runs taken at √s = 2.36TeV one finds very similar average transverse luminous sizes in x and y: σ(x) = 165μm 4μm and σ(y) = 163μm 4μm). The errors shown for the beam spot fit results are statistical only. data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-xz10.gif
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Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 142308 at √s = 2.36TeV. In spite of the degradation of the primary vertex resolution to about 135μm due to the SCT being off, one can clearly see the smaller RMS width of the transverse primary vertex distribution that is expected at the higher energy. The longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from the maximum likelihood fit is σ(y) = 143μm 5μm, the longitudinal size is σ(z) = 27.0mm 0.4mm. The errors shown for the beam spot fit results are statistical only. data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-yz10.gif
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Luminous size σ(x) over the course of run 142308 (LHC fill 916) at √s = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142308-sigx.gif
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Luminous size σ(y) over the course of run 142308 (LHC fill 916) at √s = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142308-sigy.gif
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Luminous size σ(z) over the course of run 142308 (LHC fill 916) at√ s = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142308-sigz.gif
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Evolution of the luminous size in x over several runs at √s = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigx.gif
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Evolution of the luminous size in y over several runs at √s = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigy.gif
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Evolution of the luminous size in z over several runs at √s = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigz.gif
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Alignment Performance with 2010 7 TeV Collisions data

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META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" attr="" comment="Beam spot y vs LB" date="1260618581" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" size="18107" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" tmpFilename="/usr/tmp/CGItemp50267" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" attr="" comment="Beam spot z vs LB" date="1260621283" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" size="17939" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" tmpFilename="/usr/tmp/CGItemp50110" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" attr="" comment="Beam spot z vs LB" date="1260618635" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" size="18471" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" tmpFilename="/usr/tmp/CGItemp50252" user="pippa" version="1"
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META FILEATTACHMENT attachment="PIXX.png" attr="" comment="Updated to FWHM/2.35" date="1271927718" name="PIXX.png" path="PIXX.png" size="104933" stream="PIXX.png" tmpFilename="/usr/tmp/CGItemp23222" user="pippa" version="2"
META FILEATTACHMENT attachment="SCTX.png" attr="" comment="Updated to FWHM/2.35" date="1271927922" name="SCTX.png" path="SCTX.png" size="100786" stream="SCTX.png" tmpFilename="/usr/tmp/CGItemp23338" user="pippa" version="2"
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META FILEATTACHMENT attachment="SCTX.eps" attr="" comment="Updated to FWHM/2.35" date="1271927947" name="SCTX.eps" path="SCTX.eps" size="15540" stream="SCTX.eps" tmpFilename="/usr/tmp/CGItemp23074" user="pippa" version="2"
META FILEATTACHMENT attachment="display_142165_lg.gif" attr="" comment="longitudinal beam profile as seen in PV reconstruction" date="1260648259" name="display_142165_lg.gif" path="display_142165_lg.gif" size="18750" stream="display_142165_lg.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_tr.gif" attr="" comment="transverse beam profile as seen in the PV reconstruction" date="1260648303" name="display_142165_tr.gif" path="display_142165_tr.gif" size="17836" stream="display_142165_tr.gif" tmpFilename="/usr/tmp/CGItemp24237" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_x.gif" attr="" comment="Distribution of X coordinate of reconstructed primary vertices" date="1260648340" name="display_142165_x.gif" path="display_142165_x.gif" size="11672" stream="display_142165_x.gif" tmpFilename="/usr/tmp/CGItemp24225" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_y.gif" attr="" comment="Distribution of Y coordinate of reconstructed primary vertices" date="1260648374" name="display_142165_y.gif" path="display_142165_y.gif" size="11582" stream="display_142165_y.gif" tmpFilename="/usr/tmp/CGItemp24265" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_z.gif" attr="" comment="Distribution of Z coordinate of reconstructed primary vertices." date="1260648414" name="display_142165_z.gif" path="display_142165_z.gif" size="11924" stream="display_142165_z.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_lg.eps" attr="" comment="" date="1260779361" name="display_142165_lg.eps" path="display_142165_lg.eps" size="17030" stream="display_142165_lg.eps" tmpFilename="/usr/tmp/CGItemp33143" user="kprok" version="1"
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META FILEATTACHMENT attachment="display_142165_y.eps" attr="" comment="" date="1260779427" name="display_142165_y.eps" path="display_142165_y.eps" size="9000" stream="display_142165_y.eps" tmpFilename="/usr/tmp/CGItemp33216" user="kprok" version="1"
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META FILEATTACHMENT attachment="Approved_PixBarResX.png" attr="" comment="" date="1261046490" name="Approved_PixBarResX.png" path="Approved_PixBarResX.png" size="37357" stream="Approved_PixBarResX.png" tmpFilename="/usr/tmp/CGItemp22514" user="golling" version="2"
META FILEATTACHMENT attachment="Approved_PixECAResX.eps" attr="" comment="" date="1260997905" name="Approved_PixECAResX.eps" path="Approved_PixECAResX.eps" size="18088" stream="Approved_PixECAResX.eps" tmpFilename="/usr/tmp/CGItemp41208" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_PixECAResX.png" attr="" comment="" date="1260997928" name="Approved_PixECAResX.png" path="Approved_PixECAResX.png" size="33191" stream="Approved_PixECAResX.png" tmpFilename="/usr/tmp/CGItemp41167" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_PixECCResX.eps" attr="" comment="" date="1260997950" name="Approved_PixECCResX.eps" path="Approved_PixECCResX.eps" size="18153" stream="Approved_PixECCResX.eps" tmpFilename="/usr/tmp/CGItemp41166" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_PixECCResX.png" attr="" comment="" date="1260997976" name="Approved_PixECCResX.png" path="Approved_PixECCResX.png" size="33670" stream="Approved_PixECCResX.png" tmpFilename="/usr/tmp/CGItemp41083" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTBarResX.eps" attr="" comment="" date="1260997996" name="Approved_SCTBarResX.eps" path="Approved_SCTBarResX.eps" size="25207" stream="Approved_SCTBarResX.eps" tmpFilename="/usr/tmp/CGItemp41266" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTBarResX.png" attr="" comment="" date="1260998078" name="Approved_SCTBarResX.png" path="Approved_SCTBarResX.png" size="36160" stream="Approved_SCTBarResX.png" tmpFilename="/usr/tmp/CGItemp41102" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTECAResX.eps" attr="" comment="" date="1260998103" name="Approved_SCTECAResX.eps" path="Approved_SCTECAResX.eps" size="20997" stream="Approved_SCTECAResX.eps" tmpFilename="/usr/tmp/CGItemp40954" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTECAResX.png" attr="" comment="" date="1260998125" name="Approved_SCTECAResX.png" path="Approved_SCTECAResX.png" size="36940" stream="Approved_SCTECAResX.png" tmpFilename="/usr/tmp/CGItemp41173" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTECCResX.eps" attr="" comment="" date="1260998188" name="Approved_SCTECCResX.eps" path="Approved_SCTECCResX.eps" size="21443" stream="Approved_SCTECCResX.eps" tmpFilename="/usr/tmp/CGItemp41282" user="pippa" version="1"
META FILEATTACHMENT attachment="Approved_SCTECCResX.png" attr="" comment="" date="1260998210" name="Approved_SCTECCResX.png" path="Approved_SCTECCResX.png" size="36571" stream="Approved_SCTECCResX.png" tmpFilename="/usr/tmp/CGItemp41295" user="pippa" version="1"
 
META FILEATTACHMENT attachment="Approved_PixBarResX_Feb10.eps" attr="" comment="" date="1266323003" name="Approved_PixBarResX_Feb10.eps" path="Approved_PixBarResX_Feb10.eps" size="45018" stream="Approved_PixBarResX_Feb10.eps" tmpFilename="/usr/tmp/CGItemp32713" user="golling" version="1"
META FILEATTACHMENT attachment="Approved_PixBarResX_Feb10.png" attr="" comment="" date="1266323021" name="Approved_PixBarResX_Feb10.png" path="Approved_PixBarResX_Feb10.png" size="30178" stream="Approved_PixBarResX_Feb10.png" tmpFilename="/usr/tmp/CGItemp32705" user="golling" version="1"
META FILEATTACHMENT attachment="Approved_PixECResX_Feb10.eps" attr="" comment="" date="1266323033" name="Approved_PixECResX_Feb10.eps" path="Approved_PixECResX_Feb10.eps" size="41923" stream="Approved_PixECResX_Feb10.eps" tmpFilename="/usr/tmp/CGItemp32641" user="golling" version="1"
Line: 1060 to 419
 
META FILEATTACHMENT attachment="Deltat_vs_Time_final.png" attr="" comment="" date="1276256004" name="Deltat_vs_Time_final.png" path="Deltat_vs_Time_final.png" size="51045" stream="Deltat_vs_Time_final.png" tmpFilename="/usr/tmp/CGItemp22177" user="pippa" version="2"
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META FILEATTACHMENT attachment="Hits_vs_Deltat_final.png" attr="" comment="" date="1276256018" name="Hits_vs_Deltat_final.png" path="Hits_vs_Deltat_final.png" size="55476" stream="Hits_vs_Deltat_final.png" tmpFilename="/usr/tmp/CGItemp22259" user="pippa" version="2"
Deleted:
<
<
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META FILEATTACHMENT attachment="InDetScatterPlot-141811-noframe.png" attr="" comment="" date="1270737119" name="InDetScatterPlot-141811-noframe.png" path="InDetScatterPlot-141811-noframe.png" size="583653" stream="InDetScatterPlot-141811-noframe.png" tmpFilename="/usr/tmp/CGItemp26333" user="pippa" version="1"
 
META FILEATTACHMENT attachment="152166-sigz.eps" attr="" comment="" date="1271452318" name="152166-sigz.eps" path="152166-sigz.eps" size="11122" stream="152166-sigz.eps" tmpFilename="/usr/tmp/CGItemp21723" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="3"
META FILEATTACHMENT attachment="152166-sigz.gif" attr="" comment="" date="1271452324" name="152166-sigz.gif" path="152166-sigz.gif" size="9737" stream="152166-sigz.gif" tmpFilename="/usr/tmp/CGItemp21571" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="3"
META FILEATTACHMENT attachment="152166-x.eps" attr="" comment="" date="1271452330" name="152166-x.eps" path="152166-x.eps" size="10723" stream="152166-x.eps" tmpFilename="/usr/tmp/CGItemp21206" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="3"
Line: 1076 to 433
 
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Deleted:
<
<
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META FILEATTACHMENT attachment="142193-sigx.gif" attr="" comment="" date="1271861043" name="142193-sigx.gif" path="142193-sigx.gif" size="10793" stream="142193-sigx.gif" tmpFilename="/usr/tmp/CGItemp24350" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-sigy.eps" attr="" comment="" date="1271861047" name="142193-sigy.eps" path="142193-sigy.eps" size="12292" stream="142193-sigy.eps" tmpFilename="/usr/tmp/CGItemp24643" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-sigy.gif" attr="" comment="" date="1271861051" name="142193-sigy.gif" path="142193-sigy.gif" size="10648" stream="142193-sigy.gif" tmpFilename="/usr/tmp/CGItemp24568" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-sigz.eps" attr="" comment="" date="1271861056" name="142193-sigz.eps" path="142193-sigz.eps" size="13054" stream="142193-sigz.eps" tmpFilename="/usr/tmp/CGItemp24572" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-sigz.gif" attr="" comment="" date="1271861060" name="142193-sigz.gif" path="142193-sigz.gif" size="11075" stream="142193-sigz.gif" tmpFilename="/usr/tmp/CGItemp24438" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-x.eps" attr="" comment="" date="1271861087" name="142193-x.eps" path="142193-x.eps" size="14546" stream="142193-x.eps" tmpFilename="/usr/tmp/CGItemp24838" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-x.gif" attr="" comment="" date="1271861092" name="142193-x.gif" path="142193-x.gif" size="12575" stream="142193-x.gif" tmpFilename="/usr/tmp/CGItemp24646" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-y.eps" attr="" comment="" date="1271861096" name="142193-y.eps" path="142193-y.eps" size="14559" stream="142193-y.eps" tmpFilename="/usr/tmp/CGItemp24600" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="142193-y.gif" attr="" comment="" date="1271861100" name="142193-y.gif" path="142193-y.gif" size="12735" stream="142193-y.gif" tmpFilename="/usr/tmp/CGItemp24397" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
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Revision 372010-11-23 - PippaWells

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BCM results from December 2009 collision data

These plots show results from the Beam Conditions Monitor - eight diamond sensors placed four each side of the ATLAS pixel detector, 1.84m away from the centre of the detector. These plots were approved on 16 February 2010.

BCM Time-Of-Flight (TOF) collision and beam background events as function of the Bunch Crossing Identifier (BCID) showing the LHC fill structure for run 142193. Beam background and collision events are visible for bunch crossings with the IDs 1,101 and 2774. Bunch crossings 424 & 2209 have only beam background events from Beam 1 and bunch crossings 1315 & 1880 only beam background events from Beam 2, respectively. These bunch crossings are presumably creating collisions in ALICE and LHCb.

Deltat_vs_BCID_final.png
eps version of the figure

Time evolution of beam background and collision events for run 142193 measured as a BCM Time-Of-Flight (TOF) distribution between the two detector stations located at z = 1.84m. The time is binned in units of Event Counter Reset (ECR), which are 5s signals. The ECR itself is reset approximately every 21 minutes. Since the run was almost 6 hours long, the plot shows a superposition of ~18 ECR sweeps. A higher beam background period for Beam1 is visible between ECR values 210 and 230.

Deltat_vs_Time_final.png
eps version of the figure

BCM Time-Of-Flight (TOF) distribution for run 142193 between the two BCM detector stations located at z = 1.84m. Δt values of 12.5 ns represent beam background events from LHC Beam 1 whereas Δt values of -12.5 ns represent LHC Beam 2 background events, respectively. Collision events have Δt values of 0 ns. A Gaussian fit of the collision peak in the tC - tA TOF distribution yields a width of 972 ps; this is consistent with a single side time resolution of 687 ps.

Hits_vs_Deltat_final.png
eps version of the figure
 

2010 Beam Spot results at 7 TeV

Revision 362010-10-29 - SalvadorMarti

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 measurement because of the contribution from multiple scattering.
TRTR_Oct2010Alignment.png
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TRTECR_Oct2010Alignment.png
 
eps version of the barrel residuals figure
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TRTECR_Oct2010Alignment.png
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 alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the straw.
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TRT_barrel_ResMaps_May10.gif TRT_barrel_ResMaps_Oct10.gif
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TRT_barrel_ResMaps_May10.png
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TRT_barrel_ResMaps_Oct10.png
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TRT end-cap A residual maps for May 2010 alignment (left) and October 2010 alignment (right). The mean residual is plotted as a function of the TRT end-cap wheel number (increasing with increasing global |z|) and ϕ sector position of the reconstructed hit. Coherent misalignments corresponding to end-cap 4-plane wheel deformations, are uncorrected in the May 2010 and give rise to structure in the mean residual vs Phi. These misalignments are removed by the wire-by-wire alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the ϕ sectors.
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TRT_ECA_ResMaps_PhiZ_May10.gif TRT_ECA_ResMaps_PhiZ_Oct10.gif
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TRT_ECA_ResMaps_PhiZ_May10.png
eps version of the May10 residual maps figure
TRT_ECA_ResMaps_PhiZ_Oct10.png
 
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eps version of the Oct10 residual maps figure
 
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 removed by the wire-by-wire alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the straw.
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TRT_ECA_ResMap_RZ_May10.gif TRT_ECA_ResMap_RZ_Oct10.gif
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TRT_ECA_ResMap_RZ_May10.png
eps version of the May10 residual maps figure
TRT_ECA_ResMap_RZ_Oct10.png
 
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eps version of the Oct10 residual maps figure
 
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META FILEATTACHMENT attachment="TRT_ECA_ResMap_RZ_Oct10.gif" attr="" comment="" date="1288200793" name="TRT_ECA_ResMap_RZ_Oct10.gif" path="TRT_ECA_ResMap_RZ_Oct10.gif" size="25705" stream="TRT_ECA_ResMap_RZ_Oct10.gif" tmpFilename="/usr/tmp/CGItemp60709" user="martis" version="1"
META FILEATTACHMENT attachment="SCTECX_OCT2010Alignment.eps" attr="" comment="" date="1288275289" name="SCTECX_OCT2010Alignment.eps" path="SCTECX_OCT2010Alignment.eps" size="15400" stream="SCTECX_OCT2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp10789" user="martis" version="1"
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Revision 352010-10-28 - SalvadorMarti

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Revision 342010-10-27 - SalvadorMarti

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Alignment Performance with 2010 7 TeV Collisions data and October 2010 alignment (Autumn reprocessing constants)

The validation plots below show the performance of the alignment which was used for the Autumn 2010 reprocessing. This alignment was derived using the Global X2 algorithm using the 2010 7 TeV GeV collisions dataset, and corresponds to the following alignment tags
  • Silicon constants: InDetAlign_Collision_7T_2010_07
  • TRT alignment constants: TRTAlign_Collision_7T_2010_07
  • TRT L3 alignment constants: TRTCalibDX_L3BarrelEndcap_01
  • Error scaling: TrkErrorScaling_7T_2010_03
  • All this tags are collected in: COMCOND-REPPxx-007-05 family
Distribution of the local x unbiased residuals of the pixel barrel modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution). The local x coordinate of the pixels is along the most precise pixel direction. PIXX_Oct2010Alignment.png
eps version of the figure
Distribution of the local y unbiased residuals of the pixel barrel modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution). The local y coordinate of the pixels is along the broad pixel direction. PIXY_Oct2010Alignment.png
eps version of the figure
Distribution of the local x unbiased residuals of the pixel end-cap modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution).The local x coordinate of the pixels is along the most precise pixel direction. PIXECX_Oct2010Alignment.png
eps version of the figure
Distribution of the local y unbiased residuals of the pixel end-cap modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution).The local y coordinate of the pixels is along the broad pixel direction. PIXECY_Oct2010Alignment.png
eps version of the figure
Distribution of the local x unbiased residuals of the SCT barrel modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution). The local x coordinate of the SCT is across the micro-strip direction. SCTX_Oct2010Alignment.png
eps version of the figure
Distribution of the local x unbiased residuals of the SCT end-cap modules. Plot produced with tracks (pT> 2 GeV) reconstructed in LHC Minimum Bias events at center of mass energy 7 TeV. Full blue circles show the real data residuals after the detector alignment, and the open red circles show the residuals using MC with a perfectly aligned detector (normalized to the number of entries in the data distribution). The local x coordinate of the SCT is across the micro-strip direction. SCTECX_Oct2010Alignment.png
eps version of the figure
The TRT unbiased residuals, as obtained from 7 TeV LHC collision data after detector alignment and Monte Carlo (perfectly aligned detector), separately for the barrel and end-caps. The Monte Carlo distributions (open red circles) are normalized to the number of entries in the data (full blue circles). Tracks are required to have pT> 2 GeV. For low-momentum tracks, the width of the residual distribution is expected to be larger than the intrinsic accuracy per hit as predicted from the drifttime measurement because of the contribution from multiple scattering. TRTR_Oct2010Alignment.png TRTECR_Oct2010Alignment.png
eps version of the barrel residuals figure eps version of the endcap residuals figure
Residual maps for the TRT innermost barrel layer using the May 2010 alignment (left) and October 2010 alignment (right). The mean residual is plotted as a function of the global z and ϕ sector position of the reconstructed hit. The z axis is parallel to the straw direction. Coherent misalignments corresponding to barrel module deformations, are uncorrected in the May 2010 and give rise to structure in the mean residual vs z. These misalignments are removed by the wire-by-wire alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the straw. TRT_barrel_ResMaps_May10.gif TRT_barrel_ResMaps_Oct10.gif
<!-- eps version of the barrel residuals figure -->
<!-- eps version of the endcap residuals figure -->
TRT end-cap A residual maps for May 2010 alignment (left) and October 2010 alignment (right). The mean residual is plotted as a function of the TRT end-cap wheel number (increasing with increasing global |z|) and ϕ sector position of the reconstructed hit. Coherent misalignments corresponding to end-cap 4-plane wheel deformations, are uncorrected in the May 2010 and give rise to structure in the mean residual vs Phi. These misalignments are removed by the wire-by-wire alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the ϕ sectors. TRT_ECA_ResMaps_PhiZ_May10.gif TRT_ECA_ResMaps_PhiZ_Oct10.gif
<!-- eps version of the barrel residuals figure -->
<!-- eps version of the endcap residuals figure -->
TRT end-cap A residual maps for May 2010 alignment (left) and October 2010 alignment (right). The mean residual is plotted as a function of the TRT end-cap wheel number (increasing with increasing global |z|) and the radius of the reconstructed hit. In this view, the straws are radial. Coherent misalignments corresponding to end-cap 4-plane wheel deformations, are uncorrected in the May 2010 and give rise to structure in the mean residual vs position along the straw. The observed alternating pattern is a result of the back-to-back mechanical assembly of the TRT end-cap wheels. These misalignments are removed by the wire-by-wire alignment in the October 2010 alignment constants, where the average residuals are centered around zero with no evidence of variation of along the straw. TRT_ECA_ResMap_RZ_May10.gif TRT_ECA_ResMap_RZ_Oct10.gif
<!-- eps version of the barrel residuals figure -->
<!-- eps version of the endcap residuals figure -->
 
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META FILEATTACHMENT attachment="SCTX_Oct2010Alignment.png" attr="" comment="" date="1288198558" name="SCTX_Oct2010Alignment.png" path="SCTX_Oct2010Alignment.png" size="97175" stream="SCTX_Oct2010Alignment.png" tmpFilename="/usr/tmp/CGItemp60702" user="martis" version="1"
META FILEATTACHMENT attachment="SCTECX_Oct2010Alignment.eps" attr="" comment="" date="1288198698" name="SCTECX_Oct2010Alignment.eps" path="SCTECX_Oct2010Alignment.eps" size="15215" stream="SCTECX_Oct2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp60807" user="martis" version="1"
META FILEATTACHMENT attachment="SCTECX_Oct2010Alignment.png" attr="" comment="" date="1288198718" name="SCTECX_Oct2010Alignment.png" path="SCTECX_Oct2010Alignment.png" size="101577" stream="SCTECX_Oct2010Alignment.png" tmpFilename="/usr/tmp/CGItemp60813" user="martis" version="1"
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META FILEATTACHMENT attachment="TRTR_Oct2010Alignment.png" attr="" comment="" date="1288199338" name="TRTR_Oct2010Alignment.png" path="TRTR_Oct2010Alignment.png" size="105016" stream="TRTR_Oct2010Alignment.png" tmpFilename="/usr/tmp/CGItemp60746" user="martis" version="1"
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Revision 332010-06-11 - PippaWells

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Deltat_vs_BCID_final.png
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Deltat_vs_Time_final.png
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Hits_vs_Deltat_final.png
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META FILEATTACHMENT attachment="Approved_SCTECResX_Feb10.eps" attr="" comment="" date="1266323088" name="Approved_SCTECResX_Feb10.eps" path="Approved_SCTECResX_Feb10.eps" size="47540" stream="Approved_SCTECResX_Feb10.eps" tmpFilename="/usr/tmp/CGItemp32730" user="golling" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_BCID.eps" attr="" comment="" date="1266568118" name="Deltat_vs_BCID.eps" path="Deltat_vs_BCID.eps" size="5936061" stream="Deltat_vs_BCID.eps" tmpFilename="/usr/tmp/CGItemp12405" user="pippa" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_BCID_final.png" attr="" comment="" date="1266568132" name="Deltat_vs_BCID_final.png" path="Deltat_vs_BCID_final.png" size="56451" stream="Deltat_vs_BCID_final.png" tmpFilename="/usr/tmp/CGItemp12454" user="pippa" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_BCID_final.png" attr="" comment="" date="1276255947" name="Deltat_vs_BCID_final.png" path="Deltat_vs_BCID_final.png" size="55671" stream="Deltat_vs_BCID_final.png" tmpFilename="/usr/tmp/CGItemp21977" user="pippa" version="2"
 
META FILEATTACHMENT attachment="Deltat_vs_Time.eps" attr="" comment="" date="1266568144" name="Deltat_vs_Time.eps" path="Deltat_vs_Time.eps" size="6280577" stream="Deltat_vs_Time.eps" tmpFilename="/usr/tmp/CGItemp12319" user="pippa" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_Time_final.png" attr="" comment="" date="1266568157" name="Deltat_vs_Time_final.png" path="Deltat_vs_Time_final.png" size="52077" stream="Deltat_vs_Time_final.png" tmpFilename="/usr/tmp/CGItemp12231" user="pippa" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_Time_final.png" attr="" comment="" date="1276256004" name="Deltat_vs_Time_final.png" path="Deltat_vs_Time_final.png" size="51045" stream="Deltat_vs_Time_final.png" tmpFilename="/usr/tmp/CGItemp22177" user="pippa" version="2"
 
META FILEATTACHMENT attachment="Hits_vs_Deltat.eps" attr="" comment="" date="1266568174" name="Hits_vs_Deltat.eps" path="Hits_vs_Deltat.eps" size="5918211" stream="Hits_vs_Deltat.eps" tmpFilename="/usr/tmp/CGItemp12360" user="pippa" version="1"
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META FILEATTACHMENT attachment="Hits_vs_Deltat_final.png" attr="" comment="" date="1266568190" name="Hits_vs_Deltat_final.png" path="Hits_vs_Deltat_final.png" size="57952" stream="Hits_vs_Deltat_final.png" tmpFilename="/usr/tmp/CGItemp12222" user="pippa" version="1"
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META FILEATTACHMENT attachment="Hits_vs_Deltat_final.png" attr="" comment="" date="1276256018" name="Hits_vs_Deltat_final.png" path="Hits_vs_Deltat_final.png" size="55476" stream="Hits_vs_Deltat_final.png" tmpFilename="/usr/tmp/CGItemp22259" user="pippa" version="2"
 
META FILEATTACHMENT attachment="InDetScatterPlot-141811-noframe.eps" attr="" comment="" date="1270737104" name="InDetScatterPlot-141811-noframe.eps" path="InDetScatterPlot-141811-noframe.eps" size="6790752" stream="InDetScatterPlot-141811-noframe.eps" tmpFilename="/usr/tmp/CGItemp26458" user="pippa" version="1"
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META FILEATTACHMENT attachment="TRTR_May2010Alignment.eps" attr="" comment="TRT Barrel Residual for May 2010 Alignment" date="1275483907" name="TRTR_May2010Alignment.eps" path="TRTR_May2010Alignment.eps" size="15938" stream="TRTR_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22655" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTEC_May2010Alignment.png" attr="" comment="TRT Endcaps Residual for May 2010 Alignment" date="1275483933" name="TRTEC_May2010Alignment.png" path="TRTEC_May2010Alignment.png" size="23879" stream="TRTEC_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22704" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTEC_May2010Alignment.eps" attr="" comment="TRT Endcaps Residual for May 2010 Alignment" date="1275483953" name="TRTEC_May2010Alignment.eps" path="TRTEC_May2010Alignment.eps" size="16654" stream="TRTEC_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22655" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_BCID_final.eps" attr="" comment="" date="1276256113" name="Deltat_vs_BCID_final.eps" path="Deltat_vs_BCID_final.eps" size="5556836" stream="Deltat_vs_BCID_final.eps" tmpFilename="/usr/tmp/CGItemp22336" user="pippa" version="1"
META FILEATTACHMENT attachment="Deltat_vs_Time_final.eps" attr="" comment="" date="1276256129" name="Deltat_vs_Time_final.eps" path="Deltat_vs_Time_final.eps" size="5602632" stream="Deltat_vs_Time_final.eps" tmpFilename="/usr/tmp/CGItemp22248" user="pippa" version="1"
META FILEATTACHMENT attachment="Hits_vs_Deltat_final.eps" attr="" comment="" date="1276256141" name="Hits_vs_Deltat_final.eps" path="Hits_vs_Deltat_final.eps" size="5058140" stream="Hits_vs_Deltat_final.eps" tmpFilename="/usr/tmp/CGItemp22276" user="pippa" version="1"

Revision 322010-06-02 - unknown

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The validation plots below show the performance of the alignment which is used for the May10 reprocessing. This alignment was derived using the Global X2 algorithm using the 2009 900 GeV collisions dataset, and corresponds to the following alignment tags:
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The validation plots below show the performance of the alignment which was used for the May 2010 reprocessing. This alignment was derived using the Global X2 algorithm using the 2009 900 GeV collisions dataset, and corresponds to the following alignment tags:
 
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The tracking residuals for a 7 TeV collisions run (153565) are shown.
 
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted.
>
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data (run 153565) taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted.
 
PIXX_May2010Alignment.png
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel endcaps (both endcaps A and C) for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data (run 153565) taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted. PIXECX_May2010Alignment.png
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data (run 153565) taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted. SCTX_May2010Alignment.png
eps version of the figure

Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT endcaps (both endcaps A and C) for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data (run 153565) taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted. SCTECX_May2010Alignment.png
eps version of the figure

The TRT unbiased residuals, as obtained from 7 TeV collision data (run 153565) and Monte Carlo, separately for the barrel and end-caps. The Monte Carlo distributions are normalized to the number of entries in the data. Tracks are required to have: pT > 2 GeV and >= 6 silicon hits. The Full-Width-Half-Maximum reported in the plots (FWHM/2.35) is comparable to the sigma of a single Gaussian fit. A single Gaussian fit (iterated until the range corresponds to +/- 1.5*sigma) gives 144 microns (144 microns) and 165 microns (136 microns) for barrel and end-cap data (MC), respectively. For these low-momentum tracks, the width of the residual distribution is larger than the intrinsic accuracy per hit expected from the drift-time measurement because of the contribution from multiple scattering to the track parameter errors. The measured resolution in the end-caps is worse than in the barrel and than that expected from the Monte Carlo. Unlike the barrel, the TRT end-cap geometry did not allow for detailed studies with cosmic rays, further commissioning of the TRT end-caps is required to achieve performance similar to that of the barrel. TRTR_May2010Alignment.png
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TRTECR_May2010Alignment.png
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META FILEATTACHMENT attachment="SCTX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932623" name="SCTX_Apr2010.png" path="SCTX_Apr2010.png" size="100786" stream="SCTX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp24169" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXX_May2010Alignment.png" attr="" comment="Pixel Barrel X residual for May2010 alignment update" date="1275476334" name="PIXX_May2010Alignment.png" path="PIXX_May2010Alignment.png" size="22646" stream="PIXX_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22813" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXX_May2010Alignment.eps" attr="" comment="Pixel Barrel X residual for May2010 alignment update" date="1275476359" name="PIXX_May2010Alignment.eps" path="PIXX_May2010Alignment.eps" size="14831" stream="PIXX_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22882" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
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META FILEATTACHMENT attachment="PIXECX_May2010Alignment.eps" attr="" comment="Pixel Endcaps X residual for May2010 alignment update" date="1275483714" name="PIXECX_May2010Alignment.eps" path="PIXECX_May2010Alignment.eps" size="15055" stream="PIXECX_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22744" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXECX_May2010Alignment.png" attr="" comment="Pixel Endcaps X residual for May2010 alignment update" date="1275483736" name="PIXECX_May2010Alignment.png" path="PIXECX_May2010Alignment.png" size="21779" stream="PIXECX_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22690" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX_May2010Alignment.png" attr="" comment="SCT Barrel X Residual for May2010 Alignment" date="1275483771" name="SCTX_May2010Alignment.png" path="SCTX_May2010Alignment.png" size="23878" stream="SCTX_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22652" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX_May2010Alignment.eps" attr="" comment="SCT Barrel X Residual for May2010 Alignment" date="1275483809" name="SCTX_May2010Alignment.eps" path="SCTX_May2010Alignment.eps" size="15161" stream="SCTX_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22547" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTECX_May2010Alignment.png" attr="" comment="SCT Endcaps X Residual for May2010 Alignment" date="1275483834" name="SCTECX_May2010Alignment.png" path="SCTECX_May2010Alignment.png" size="22193" stream="SCTECX_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22963" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTECX_May2010Alignment.eps" attr="" comment="SCT Endcaps X Residual for May2010 Alignment" date="1275483854" name="SCTECX_May2010Alignment.eps" path="SCTECX_May2010Alignment.eps" size="14171" stream="SCTECX_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22657" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTR_May2010Alignment.png" attr="" comment="TRT Barrel Residual for May 2010 Alignment" date="1275483885" name="TRTR_May2010Alignment.png" path="TRTR_May2010Alignment.png" size="22719" stream="TRTR_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22715" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTR_May2010Alignment.eps" attr="" comment="TRT Barrel Residual for May 2010 Alignment" date="1275483907" name="TRTR_May2010Alignment.eps" path="TRTR_May2010Alignment.eps" size="15938" stream="TRTR_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22655" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTEC_May2010Alignment.png" attr="" comment="TRT Endcaps Residual for May 2010 Alignment" date="1275483933" name="TRTEC_May2010Alignment.png" path="TRTEC_May2010Alignment.png" size="23879" stream="TRTEC_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22704" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="TRTEC_May2010Alignment.eps" attr="" comment="TRT Endcaps Residual for May 2010 Alignment" date="1275483953" name="TRTEC_May2010Alignment.eps" path="TRTEC_May2010Alignment.eps" size="16654" stream="TRTEC_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22655" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"

Revision 312010-06-02 - unknown

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META TOPICPARENT name="AtlasResults"
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Alignment Performance with 2010 7 TeV Collisions data

The validation plots below show the performance of the alignment which is used for the May10 reprocessing. This alignment was derived using the Global X2 algorithm using the 2009 900 GeV collisions dataset, and corresponds to the following alignment tags:

The tracking residuals for a 7 TeV collisions run (153565) are shown.

Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (red) and the current alignment with sqrt(s)=7 TeV collision data taken in 2010 (blue). The MC distributions are normalised to the number of entries in the data distributions. The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV and ≥ 6 silicon hits. The FWHM/2.35 of the distributions are quoted. PIXX_May2010Alignment.png
eps version of the figure

 
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META FILEATTACHMENT attachment="SCTECX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932573" name="SCTECX_Apr2010.png" path="SCTECX_Apr2010.png" size="106929" stream="SCTECX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp23879" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTX_Apr2010.eps" attr="" comment="Updated to FWHM/2.35" date="1271932595" name="SCTX_Apr2010.eps" path="SCTX_Apr2010.eps" size="15540" stream="SCTX_Apr2010.eps" tmpFilename="/usr/tmp/CGItemp24023" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932623" name="SCTX_Apr2010.png" path="SCTX_Apr2010.png" size="100786" stream="SCTX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp24169" user="pippa" version="1"
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META FILEATTACHMENT attachment="PIXX_May2010Alignment.png" attr="" comment="Pixel Barrel X residual for May2010 alignment update" date="1275476334" name="PIXX_May2010Alignment.png" path="PIXX_May2010Alignment.png" size="22646" stream="PIXX_May2010Alignment.png" tmpFilename="/usr/tmp/CGItemp22813" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXX_May2010Alignment.eps" attr="" comment="Pixel Barrel X residual for May2010 alignment update" date="1275476359" name="PIXX_May2010Alignment.eps" path="PIXX_May2010Alignment.eps" size="14831" stream="PIXX_May2010Alignment.eps" tmpFilename="/usr/tmp/CGItemp22882" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"

Revision 302010-05-10 - PatrickJussel

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Public Inner Detector Plots for Collision Data

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Revision 292010-04-22 - PippaWells

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Changed:
<
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).
>
>
Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.
 
Changed:
<
<
Approved_PixBarResX_Feb10.png
>
>
PIXX_Apr2010.png
 
Changed:
<
<
eps version of the figure
>
>
eps version of the figure
 
Changed:
<
<
Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel ECs for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, fcore).
>
>
Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel ECs for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.
 
Changed:
<
<
Approved_PixECResX_Feb10.png
>
>
PIXECX_Apr2010.png
 
Changed:
<
<
eps version of the figure
>
>
eps version of the figure
 
Changed:
<
<
Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).
>
>
Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.
 
Changed:
<
<
Approved_SCTBarResX_Feb10.png
>
>
SCTX_Apr2010.png
 
Changed:
<
<
eps version of the figure
>
>
eps version of the figure
 
Changed:
<
<
Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT ECs for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).
>
>
Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT ECs for the MC perfect alignment (red) and the current alignment with collision data taken in 2009 (blue). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. The mean and FWHM/2.35 are quoted.
 
Changed:
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Approved_SCTECResX_Feb10.png
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SCTECX_Apr2010.png
 
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eps version of the figure
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eps version of the figure
 
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META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" attr="" comment="Beam spot z vs LB" date="1260621283" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" size="17939" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" tmpFilename="/usr/tmp/CGItemp50110" user="pippa" version="1"
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META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" attr="" comment="Beam spot y vs LB" date="1260618764" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" size="18564" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" tmpFilename="/usr/tmp/CGItemp50245" user="pippa" version="1"
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META FILEATTACHMENT attachment="PIXX.png" attr="" comment="Pixel Barrel X residual" date="1260632675" name="PIXX.png" path="PIXX.png" size="18396" stream="PIXX.png" tmpFilename="/usr/tmp/CGItemp2529" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX.png" attr="" comment="SCT Barrel X Residual" date="1260632721" name="SCTX.png" path="SCTX.png" size="17976" stream="SCTX.png" tmpFilename="/usr/tmp/CGItemp2742" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXX.eps" attr="" comment="" date="1260634401" name="PIXX.eps" path="PIXX.eps" size="17564" stream="PIXX.eps" tmpFilename="/usr/tmp/CGItemp2521" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX.eps" attr="" comment="" date="1260634435" name="SCTX.eps" path="SCTX.eps" size="17654" stream="SCTX.eps" tmpFilename="/usr/tmp/CGItemp2489" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
>
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META FILEATTACHMENT attachment="PIXX.png" attr="" comment="Updated to FWHM/2.35" date="1271927718" name="PIXX.png" path="PIXX.png" size="104933" stream="PIXX.png" tmpFilename="/usr/tmp/CGItemp23222" user="pippa" version="2"
META FILEATTACHMENT attachment="SCTX.png" attr="" comment="Updated to FWHM/2.35" date="1271927922" name="SCTX.png" path="SCTX.png" size="100786" stream="SCTX.png" tmpFilename="/usr/tmp/CGItemp23338" user="pippa" version="2"
META FILEATTACHMENT attachment="PIXX.eps" attr="" comment="Updated to FWHM/2.35" date="1271927825" name="PIXX.eps" path="PIXX.eps" size="16591" stream="PIXX.eps" tmpFilename="/usr/tmp/CGItemp23238" user="pippa" version="2"
META FILEATTACHMENT attachment="SCTX.eps" attr="" comment="Updated to FWHM/2.35" date="1271927947" name="SCTX.eps" path="SCTX.eps" size="15540" stream="SCTX.eps" tmpFilename="/usr/tmp/CGItemp23074" user="pippa" version="2"
 
META FILEATTACHMENT attachment="display_142165_lg.gif" attr="" comment="longitudinal beam profile as seen in PV reconstruction" date="1260648259" name="display_142165_lg.gif" path="display_142165_lg.gif" size="18750" stream="display_142165_lg.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_tr.gif" attr="" comment="transverse beam profile as seen in the PV reconstruction" date="1260648303" name="display_142165_tr.gif" path="display_142165_tr.gif" size="17836" stream="display_142165_tr.gif" tmpFilename="/usr/tmp/CGItemp24237" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_x.gif" attr="" comment="Distribution of X coordinate of reconstructed primary vertices" date="1260648340" name="display_142165_x.gif" path="display_142165_x.gif" size="11672" stream="display_142165_x.gif" tmpFilename="/usr/tmp/CGItemp24225" user="kprok" version="1"
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META FILEATTACHMENT attachment="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif" attr="" comment="" date="1271861588" name="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif" path="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif" size="13694" stream="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif" tmpFilename="/usr/tmp/CGItemp24574" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.eps" attr="" comment="" date="1271861595" name="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.eps" path="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.eps" size="135871" stream="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.eps" tmpFilename="/usr/tmp/CGItemp24593" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif" attr="" comment="" date="1271861602" name="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif" path="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif" size="21926" stream="data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif" tmpFilename="/usr/tmp/CGItemp24569" user="peter_2evladimir_2eloscutoff_40cern_2ech" version="1"
Added:
>
>
META FILEATTACHMENT attachment="PIXECX.png" attr="" comment="Updated to FWHM/2.35" date="1271927861" name="PIXECX.png" path="PIXECX.png" size="102490" stream="PIXECX.png" tmpFilename="/usr/tmp/CGItemp23377" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXECX.eps" attr="" comment="Updated to FWHM/2.35" date="1271927892" name="PIXECX.eps" path="PIXECX.eps" size="16197" stream="PIXECX.eps" tmpFilename="/usr/tmp/CGItemp23247" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTECX.png" attr="" comment="Updated to FWHM/2.35" date="1271927975" name="SCTECX.png" path="SCTECX.png" size="106929" stream="SCTECX.png" tmpFilename="/usr/tmp/CGItemp23270" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTECX.eps" attr="" comment="Updated to FWHM/2.35" date="1271927999" name="SCTECX.eps" path="SCTECX.eps" size="16090" stream="SCTECX.eps" tmpFilename="/usr/tmp/CGItemp23240" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXECX_Apr2010.eps" attr="" comment="Updated to FWHM/2.35" date="1271932329" name="PIXECX_Apr2010.eps" path="PIXECX_Apr2010.eps" size="16197" stream="PIXECX_Apr2010.eps" tmpFilename="/usr/tmp/CGItemp23899" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXECX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932356" name="PIXECX_Apr2010.png" path="PIXECX_Apr2010.png" size="102490" stream="PIXECX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp24109" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXX_Apr2010.eps" attr="" comment="Updated to FWHM/2.35" date="1271932385" name="PIXX_Apr2010.eps" path="PIXX_Apr2010.eps" size="16591" stream="PIXX_Apr2010.eps" tmpFilename="/usr/tmp/CGItemp23926" user="pippa" version="1"
META FILEATTACHMENT attachment="PIXX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932422" name="PIXX_Apr2010.png" path="PIXX_Apr2010.png" size="104933" stream="PIXX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp23988" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTECX_Apr2010.eps" attr="" comment="Updated to FWHM/2.35" date="1271932446" name="SCTECX_Apr2010.eps" path="SCTECX_Apr2010.eps" size="16090" stream="SCTECX_Apr2010.eps" tmpFilename="/usr/tmp/CGItemp24002" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTECX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932573" name="SCTECX_Apr2010.png" path="SCTECX_Apr2010.png" size="106929" stream="SCTECX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp23879" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTX_Apr2010.eps" attr="" comment="Updated to FWHM/2.35" date="1271932595" name="SCTX_Apr2010.eps" path="SCTX_Apr2010.eps" size="15540" stream="SCTX_Apr2010.eps" tmpFilename="/usr/tmp/CGItemp24023" user="pippa" version="1"
META FILEATTACHMENT attachment="SCTX_Apr2010.png" attr="" comment="Updated to FWHM/2.35" date="1271932623" name="SCTX_Apr2010.png" path="SCTX_Apr2010.png" size="100786" stream="SCTX_Apr2010.png" tmpFilename="/usr/tmp/CGItemp24169" user="pippa" version="1"

Revision 282010-04-22 - JuergBeringer

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META TOPICPARENT name="AtlasResults"
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Two dimensional distribution in the x-z plane of primary vertices with at least 4 tracks per
Changed:
<
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vertex for run 142193 at ps = 900GeV. These are the primary vertices used as input to the beam spot
>
>
vertex for run 142193 at √s = 900GeV. These are the primary vertices used as input to the beam spot
 maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10
Changed:
<
<
tracks per vertex (see Figure 3). The errors shown for the beam spot fit results are statistical only.
>
>
tracks per vertex (see below). The errors shown for the beam spot fit results are statistical only.
 
data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz.gif
Line: 522 to 522
 
Two dimensional distribution in the y-z plane of primary vertices with at least 4 tracks per
Changed:
<
<
vertex for run 142193 at ps = 900GeV. These are the primary vertices used as input to the beam spot
>
>
vertex for run 142193 at √s = 900GeV. These are the primary vertices used as input to the beam spot
 maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10
Changed:
<
<
tracks per vertex (see Figure 4). The errors shown for the beam spot fit results are statistical only.
>
>
tracks per vertex (see below). The errors shown for the beam spot fit results are statistical only.
 
data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz.gif
Line: 536 to 536
 
Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per
Changed:
<
<
vertex for run 142193 at ps = 900GeV. Compared to Figure 1, the increased number of tracks per
>
>
vertex for run 142193 at √s = 900GeV. Compared to the figure above, the increased number of tracks per
 vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum
Changed:
<
<
likelihood fit is σx = 200μm 1μm, the longitudinal size is σz = 41.3mm 0.1mm. The errors
>
>
likelihood fit is σ(x) = 200μm 1μm, the longitudinal size is σ(z) = 41.3mm 0.1mm. The errors
 shown for the beam spot fit results are statistical only.
data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz10.gif
Line: 551 to 551
 
Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per
Changed:
<
<
vertex for run 142193 at ps = 900GeV. Compared to Figure 2, the increased number of tracks per
>
>
vertex for run 142193 at√ s = 900GeV. Compared to the figure above, the increased number of tracks per
 vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum
Changed:
<
<
likelihood fit is σy = 279μm 1μm, the longitudinal size is σz = 41.3mm 0.1mm. The errors
>
>
likelihood fit is σ(y) = 279μm 1μm, the longitudinal size is σ(z) = 41.3mm 0.1mm. The errors
 shown for the beam spot fit results are statistical only.
data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif
Line: 566 to 566
 
Two dimensional distribution in the y-x plane of primary vertices with at least 10 tracks per
Changed:
<
<
vertex for run 142193 at ps = 900GeV. With the requirement of 10 tracks per vertex, the primary vertex
>
>
vertex for run 142193 at √s = 900GeV. With the requirement of 10 tracks per vertex, the primary vertex
 resolution of about 100μm is sufficiently small so that the RMS widths are dominated by the luminous
Changed:
<
<
size. The transverse luminous sizes extracted from the maximum likelihood fit are σx = 200μm 1μm and σy = 279μm 1μm . Both the RMS widths of the transverse primary vertex distributions and the extracted transverse luminous sizes show that the average luminous size σy is about 40% larger than σx.
>
>
size. The transverse luminous sizes extracted from the maximum likelihood fit are σ(x) = 200μm 1μm and σ(y) = 279μm 1μm . Both the RMS widths of the transverse primary vertex distributions and the extracted transverse luminous sizes show that the average luminous size σ(y) is about 40% larger than σ(x).
 The errors shown for the beam spot fit results are statistical only.
data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif
Line: 617 to 617
 
Changed:
<
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Luminous size σx over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σx
>
>
Luminous size σ(x) over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σ(x)
 decreased by about 20%. Errors are statistical only.
142193-sigx.gif
Line: 629 to 629
 
Changed:
<
<
Luminous size σy over the course of run 142193 (LHC fill 911). The data points shown are
>
>
Luminous size σ(y) over the course of run 142193 (LHC fill 911). The data points shown are
 the results from fits to samples of 10 minutes of data. During the time period shown the luminous size
Changed:
<
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σy increased by about 20%. Errors are statistical only.
>
>
σ(y) increased by about 20%. Errors are statistical only.
 
142193-sigy.gif
Line: 641 to 641
 
Changed:
<
<
Luminous size σz over the course of run 142193 (LHC fill 911). The data points shown are
>
>
Luminous size σ(z) over the course of run 142193 (LHC fill 911). The data points shown are
 the results from fits to samples of 10 minutes of data. Errors are statistical only.
142193-sigz.gif
Line: 653 to 653
 
Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per
Changed:
<
<
vertex for run 142308 at ps = 2.36TeV. Taking into account the degradation of the primary vertex
>
>
vertex for run 142308 at √s = 2.36TeV. Taking into account the degradation of the primary vertex
 resolution to about 135μm due to the SCT being off, one finds from the RMS width a slightly smaller
Changed:
<
<
luminous size σx than at 900 GeV. The reduction in transverse width is much smaller than for σz. The
>
>
luminous size σ(x) than at 900 GeV. The reduction in transverse width is much smaller than for σ(y). The
 longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from
Changed:
<
<
the maximum likelihood fit is σx = 180μm 5μm, the longitudinal size is σz = 27.0mm 0.4mm. (Taking the average luminous size from both runs taken at ps = 2.36TeV one finds very similar average transverse luminous sizes in x and y: σx = 165μm 4μm and σy = 163μm 4μm). The errors shown
>
>
the maximum likelihood fit is σ(x) = 180μm 5μm, the longitudinal size is σ(z) = 27.0mm 0.4mm. (Taking the average luminous size from both runs taken at √s = 2.36TeV one finds very similar average transverse luminous sizes in x and y: σ(x) = 165μm 4μm and σ(y) = 163μm 4μm). The errors shown
 for the beam spot fit results are statistical only.
data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-xz10.gif
Line: 670 to 670
 
Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per
Changed:
<
<
vertex for run 142308 at ps = 2.36TeV. In spite of the degradation of the primary vertex resolution
>
>
vertex for run 142308 at √s = 2.36TeV. In spite of the degradation of the primary vertex resolution
 to about 135μm due to the SCT being off, one can clearly see the smaller RMS width of the transverse primary vertex distribution that is expected at the higher energy. The longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from the maximum likelihood fit is
Changed:
<
<
σy = 143μm 5μm, the longitudinal size is σz = 27.0mm 0.4mm. The errors shown for the beam spot
>
>
σ(y) = 143μm 5μm, the longitudinal size is σ(z) = 27.0mm 0.4mm. The errors shown for the beam spot
 fit results are statistical only.
data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-yz10.gif
Line: 685 to 685
 
Changed:
<
<
Luminous size σx over the course of run 142308 (LHC fill 916) at ps = 2.36TeV. Both the
>
>
Luminous size σ(x) over the course of run 142308 (LHC fill 916) at √s = 2.36TeV. Both the
 results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only.
Line: 697 to 697
 
Changed:
<
<
Luminous size σz over the course of run 142308 (LHC fill 916) at ps = 2.36TeV. Both the
>
>
Luminous size σ(y) over the course of run 142308 (LHC fill 916) at √s = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only.

142308-sigy.gif
eps version of the figure
Luminous size σ(z) over the course of run 142308 (LHC fill 916) at√ s = 2.36TeV. Both the
 results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only.
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Evolution of the luminous size in x over several runs at ps = 900GeV from December 10 to
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Evolution of the luminous size in x over several runs at √s = 900GeV from December 10 to
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Evolution of the luminous size in y over several runs at ps = 900GeV from December 10 to
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Evolution of the luminous size in y over several runs at √s = 900GeV from December 10 to
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Evolution of the luminous size in z over several runs at ps = 900GeV from December 10 to
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Evolution of the luminous size in z over several runs at √s = 900GeV from December 10 to
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Beam Spot Results from December 2009

Two dimensional distribution in the x-z plane of primary vertices with at least 4 tracks per vertex for run 142193 at ps = 900GeV. These are the primary vertices used as input to the beam spot maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10 tracks per vertex (see Figure 3). The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz.gif
eps version of the figure
Two dimensional distribution in the y-z plane of primary vertices with at least 4 tracks per vertex for run 142193 at ps = 900GeV. These are the primary vertices used as input to the beam spot maximum likelihood fit. The luminous region parameters extracted using primary vertices with at least 4 tracks per vertex are in excellent agreement with the parameters obtained when requiring at least 10 tracks per vertex (see Figure 4). The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz.gif
eps version of the figure
Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 142193 at ps = 900GeV. Compared to Figure 1, the increased number of tracks per vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum likelihood fit is σx = 200μm 1μm, the longitudinal size is σz = 41.3mm 0.1mm. The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-xz10.gif
eps version of the figure
Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 142193 at ps = 900GeV. Compared to Figure 2, the increased number of tracks per vertex improves the primary vertex resolution to about 100μm, so that the RMS width of the transverse distribution is dominated by the luminous size. The transverse luminous size extracted from the maximum likelihood fit is σy = 279μm 1μm, the longitudinal size is σz = 41.3mm 0.1mm. The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yz10.gif
eps version of the figure
Two dimensional distribution in the y-x plane of primary vertices with at least 10 tracks per vertex for run 142193 at ps = 900GeV. With the requirement of 10 tracks per vertex, the primary vertex resolution of about 100μm is sufficiently small so that the RMS widths are dominated by the luminous size. The transverse luminous sizes extracted from the maximum likelihood fit are σx = 200μm 1μm and σy = 279μm 1μm . Both the RMS widths of the transverse primary vertex distributions and the extracted transverse luminous sizes show that the average luminous size σy is about 40% larger than σx. The errors shown for the beam spot fit results are statistical only. data09_900GeV.00142193.physics_MinBias-VTX-LR5.DPD.r988.v2.2-nt-yx10.gif
eps version of the figure
Luminous centroid position in x over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-x.gif
eps version of the figure
Luminous centroid position in y over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-y.gif
eps version of the figure
Luminous centroid position in z over the course of run 142193 (LHC fill 911). Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142193-z.gif
eps version of the figure
Luminous size σx over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σx decreased by about 20%. Errors are statistical only. 142193-sigx.gif
eps version of the figure
Luminous size σy over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. During the time period shown the luminous size σy increased by about 20%. Errors are statistical only. 142193-sigy.gif
eps version of the figure
Luminous size σz over the course of run 142193 (LHC fill 911). The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only. 142193-sigz.gif
eps version of the figure
Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 142308 at ps = 2.36TeV. Taking into account the degradation of the primary vertex resolution to about 135μm due to the SCT being off, one finds from the RMS width a slightly smaller luminous size σx than at 900 GeV. The reduction in transverse width is much smaller than for σz. The longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from the maximum likelihood fit is σx = 180μm 5μm, the longitudinal size is σz = 27.0mm 0.4mm. (Taking the average luminous size from both runs taken at ps = 2.36TeV one finds very similar average transverse luminous sizes in x and y: σx = 165μm 4μm and σy = 163μm 4μm). The errors shown for the beam spot fit results are statistical only. data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-xz10.gif
eps version of the figure
Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 142308 at ps = 2.36TeV. In spite of the degradation of the primary vertex resolution to about 135μm due to the SCT being off, one can clearly see the smaller RMS width of the transverse primary vertex distribution that is expected at the higher energy. The longitudinal luminous size is also smaller than at 900 GeV. The transverse luminous size extracted from the maximum likelihood fit is σy = 143μm 5μm, the longitudinal size is σz = 27.0mm 0.4mm. The errors shown for the beam spot fit results are statistical only. data09_2TeV.00142308.physics_MinBias-VTX-LR5.DPD.r988.v4.2-nt-yz10.gif
eps version of the figure
Luminous size σx over the course of run 142308 (LHC fill 916) at ps = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142308-sigx.gif
eps version of the figure
Luminous size σz over the course of run 142308 (LHC fill 916) at ps = 2.36TeV. Both the results from fits to samples of 10 minutes of data (points) and the result from the overall fit (line with error band) are shown. Errors are statistical only. 142308-sigz.gif
eps version of the figure
Evolution of the luminous size in x over several runs at ps = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigx.gif
eps version of the figure
Evolution of the luminous size in y over several runs at ps = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigy.gif
eps version of the figure
Evolution of the luminous size in z over several runs at ps = 900GeV from December 10 to December 12. Errors are statistical only. beamspothistory-sigz.gif
eps version of the figure
 
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Revision 262010-04-20 - JuergBeringer

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 Two dimensional distribution in the transverse plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size of about 45μm in x and 70μm in y with errors that are completely dominated by systematics.

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eps version of the figure
 

Revision 252010-04-16 - unknown

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Revision 242010-04-15 - unknown

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META TOPICPARENT name="AtlasResults"
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2010 Beam Spot results at 7 TeV

 
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Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. One can recognize a small tilt of the luminous region of 471μrad 15μrad. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(x) of about 45μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-xz10.gif
eps version of the figure

Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(y) of about 70μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-yz10.gif
eps version of the figure

Two dimensional distribution in the transverse plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size of about 45μm in x and 70μm in y with errors that are completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-xz10.gif
eps version of the figure

Luminous centroid position in x over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-x.gif
eps version of the figure

Luminous centroid position in y over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-y.gif
eps version of the figure

Luminous centroid position in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-z.gif
eps version of the figure

Luminous size in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-sigz.gif
eps version of the figure
 
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Revision 232010-04-08 - PippaWells

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 TRT hits are shown in blue, SCT in red, and Pixel in green. The solenoid is at full field, and the curved tracks can clearly be seen in the TRT.
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HitScatter11Dec.png
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InDetScatterPlot-141811-noframe.png
 
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eps version of the figure
 
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META FILEATTACHMENT attachment="Hits_vs_Deltat.eps" attr="" comment="" date="1266568174" name="Hits_vs_Deltat.eps" path="Hits_vs_Deltat.eps" size="5918211" stream="Hits_vs_Deltat.eps" tmpFilename="/usr/tmp/CGItemp12360" user="pippa" version="1"
META FILEATTACHMENT attachment="Hits_vs_Deltat_final.png" attr="" comment="" date="1266568190" name="Hits_vs_Deltat_final.png" path="Hits_vs_Deltat_final.png" size="57952" stream="Hits_vs_Deltat_final.png" tmpFilename="/usr/tmp/CGItemp12222" user="pippa" version="1"
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Revision 222010-02-19 - PippaWells

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META TOPICPARENT name="AtlasResults"
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Placeholder for BCM plots to be uploaded in February 2010
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These plots show results from the Beam Conditions Monitor - eight diamond sensors placed four each side of the ATLAS pixel detector, 1.84m away from the centre of the detector. These plots were approved on 16 February 2010.
 
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Caption number 1 - with the wrong plot as a place holder!!!!
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BCM Time-Of-Flight (TOF) collision and beam background events as function of the Bunch Crossing Identifier (BCID) showing the LHC fill structure for run 142193. Beam background and collision events are visible for bunch crossings with the IDs 1,101 and 2774. Bunch crossings 424 & 2209 have only beam background events from Beam 1 and bunch crossings 1315 & 1880 only beam background events from Beam 2, respectively. These bunch crossings are presumably creating collisions in ALICE and LHCb.
 
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Approved_SCTBarResX.png
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Deltat_vs_BCID_final.png
 
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eps version of the figure
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eps version of the figure

Time evolution of beam background and collision events for run 142193 measured as a BCM Time-Of-Flight (TOF) distribution between the two detector stations located at z = 1.84m. The time is binned in units of Event Counter Reset (ECR), which are 5s signals. The ECR itself is reset approximately every 21 minutes. Since the run was almost 6 hours long, the plot shows a superposition of ~18 ECR sweeps. A higher beam background period for Beam1 is visible between ECR values 210 and 230.

Deltat_vs_Time_final.png
eps version of the figure
 
Added:
>
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BCM Time-Of-Flight (TOF) distribution for run 142193 between the two BCM detector stations located at z = 1.84m. Δt values of 12.5 ns represent beam background events from LHC Beam 1 whereas Δt values of -12.5 ns represent LHC Beam 2 background events, respectively. Collision events have Δt values of 0 ns. A Gaussian fit of the collision peak in the tC - tA TOF distribution yields a width of 972 ps; this is consistent with a single side time resolution of 687 ps.

Hits_vs_Deltat_final.png
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META FILEATTACHMENT attachment="Approved_SCTBarResX_Feb10.png" attr="" comment="" date="1266323075" name="Approved_SCTBarResX_Feb10.png" path="Approved_SCTBarResX_Feb10.png" size="27955" stream="Approved_SCTBarResX_Feb10.png" tmpFilename="/usr/tmp/CGItemp32701" user="golling" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_BCID.eps" attr="" comment="" date="1266568118" name="Deltat_vs_BCID.eps" path="Deltat_vs_BCID.eps" size="5936061" stream="Deltat_vs_BCID.eps" tmpFilename="/usr/tmp/CGItemp12405" user="pippa" version="1"
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META FILEATTACHMENT attachment="Deltat_vs_Time_final.png" attr="" comment="" date="1266568157" name="Deltat_vs_Time_final.png" path="Deltat_vs_Time_final.png" size="52077" stream="Deltat_vs_Time_final.png" tmpFilename="/usr/tmp/CGItemp12231" user="pippa" version="1"
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META FILEATTACHMENT attachment="Hits_vs_Deltat_final.png" attr="" comment="" date="1266568190" name="Hits_vs_Deltat_final.png" path="Hits_vs_Deltat_final.png" size="57952" stream="Hits_vs_Deltat_final.png" tmpFilename="/usr/tmp/CGItemp12222" user="pippa" version="1"

Revision 212010-02-16 - TobiasGolling

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Description of alignment studies as of February 2010...
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The ID alignment has been further improved by using the whole collision data taken in 2009. The validation plots below show the performance of the alignment which is used for the Feb10 reprocessing, using the following alignment tags:
 
Changed:
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Caption number 1 - with the wrong plot as a place holder!!!!
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Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).
 
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Approved_SCTBarResX.png
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Approved_PixBarResX_Feb10.png
 
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eps version of the figure
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eps version of the figure

Unbiased residual distribution in x, integrated over all hits-on-tracks in the pixel ECs for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, fcore).

Approved_PixECResX_Feb10.png
eps version of the figure

Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).

Approved_SCTBarResX_Feb10.png
eps version of the figure

Unbiased residual distribution in x, integrated over all hits-on-tracks in the SCT ECs for the MC perfect alignment (blue) and the current alignment with collision data taken in 2009 (red). The residual is defined as the measured hit position minus the expected hit position from the track extrapolation. Shown is the projection onto the local x coordinate, which is the precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<10mm and ≥ 6 silicon hits. A double Gaussian fit is performed but only the mean and sigma of the narrower Gaussian and the fraction of events which go into the narrower Gaussian are quoted (μ_core, σ_core, f_core).

Approved_SCTECResX_Feb10.png
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META FILEATTACHMENT attachment="Approved_PixBarResX.eps" attr="" comment="" date="1266322777" name="Approved_PixBarResX.eps" path="Approved_PixBarResX.eps" size="24918" stream="Approved_PixBarResX.eps" tmpFilename="/usr/tmp/CGItemp32627" user="golling" version="4"
 
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META FILEATTACHMENT attachment="Approved_PixBarResX_Feb10.eps" attr="" comment="" date="1266323003" name="Approved_PixBarResX_Feb10.eps" path="Approved_PixBarResX_Feb10.eps" size="45018" stream="Approved_PixBarResX_Feb10.eps" tmpFilename="/usr/tmp/CGItemp32713" user="golling" version="1"
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Revision 202010-02-16 - PippaWells

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Refined alignment with December 2009 collision data

Description of alignment studies as of February 2010...

Caption number 1 - with the wrong plot as a place holder!!!!

Approved_SCTBarResX.png
eps version of the figure

BCM results from December 2009 collision data

Placeholder for BCM plots to be uploaded in February 2010

Caption number 1 - with the wrong plot as a place holder!!!!

Approved_SCTBarResX.png
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<!--***********************************************************-->

Revision 192010-02-09 - DavidBerge

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 nominal beam line). The distribution in red is for luminosity blocks LB<140 (before RF adjustment) and in blue for LB>145 (after RF adjustment). The shift in z0 is consistent with the 12cm expected from beam pick up measurements of
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the arrival times of the beams.
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the arrival times of the beams (cf. the beam pickup system plots).
 
TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png

Revision 182010-01-09 - TobiasGolling

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META TOPICPARENT name="AtlasResults"
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  SCT barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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after a first update using collision data (open red circles).
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after a first update using collision data (open red circles). A double Gaus fit is performed but only the mean and sigma of the narrower Gaussian are shown.
 
Approved_SCTBarResX.png
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SCT end-cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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after a first update using collision data (open red circles).
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after a first update using collision data (open red circles). A single Gaussian fit is performed.
 
Approved_SCTECAResX.png
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SCT end-cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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after a first update using collision data (open red circles).
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after a first update using collision data (open red circles). A single Gaussian fit is performed.
 
Approved_SCTECCResX.png
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Pixel barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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after a first update using collision data (open red circles). A double Gaus fit is performed but only the mean and sigma of the narrower Gaussian are shown.
 
Approved_PixBarResX.png
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Pixel end-cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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Pixel end-cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and
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Revision 172009-12-17 - PippaWells

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Results from first collisions on 23 November 2009

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Results from first collisions on 23 November 2009

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 the distribution of selected primary vertices. The fit makes use of the estimated error on the position of each reconstructed vertex, allowing for a constant error scale factor. The fit can extract both the position and the size of the beam spot.
This series of six plots show the beam spot position during a run,
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Beam spot stability - x position vs Luminosity Block

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Pixel end-cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
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Revision 152009-12-17 - TobiasGolling

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Revision 142009-12-17 - PippaWells

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Beam spot stability - x position vs Lumi Block
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Unbiased x residual distribution, integrated over all hits-on-tracks in the pixel barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. This result is achieved using the alignment constants calculated from cosmic ray samples.
 
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Unbiased x residual distribution, integrated over all hits-on-tracks in the SCT barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. This result is achieved using the alignment constants calculated from cosmic ray samples.
 
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Beam spot stability - z position vs Lumi Block
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X and Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
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data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png
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Beam spot stability - x width vs Lumi Block
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X and Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
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data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png
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X distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
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data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png
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Unbiased x residual distribution, integrated over all hits-on-tracks in the pixel barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied.
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Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
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Unbiased x residual distribution, integrated over all hits-on-tracks in the SCT barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied.
>
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The beam spot is determined from an unbinned maximum-likelihood fit to the distribution of selected primary vertices. The fit makes use of the estimated error on the position of each reconstructed vertex, allowing for a constant error scale factor. The fit can extract both the position and the size of the beam spot.
This series of six plots show the beam spot position during a run, as a function of Luminosity Block.

Beam spot stability - x position vs Luminosity Block

 
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Beam spot stability - y position vs Lumi Block
 
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X and Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
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Beam spot stability - z position vs Lumi Block
 
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Beam spot stability - x width vs Lumi Block
 
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Beam spot stability - y width vs Lumi Block
 
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Beam spot stability - z width vs Lumi Block
 
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Revision 132009-12-17 - TobiasGolling

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 barrel than the end caps. After only a few days of collision data, the quality of the end cap alignment was dramatically improved, as shown in the following plots, where the position and orientation of end cap disks is updated. The most
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notable change is an improvement in the alignment residuals for SCT end cap C.
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notable change is an improvement in the alignment residuals for SCT end cap C. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm and N(Pix+SCT)Hits>=6 is applied.
 

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PIxel barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
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Pixel barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
 collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles).
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Pixel end cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
 collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles).
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PIxel end cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
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Pixel end cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue),
 collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles).

Revision 122009-12-16 - PippaWells

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 Approved plots that can be shown by ATLAS speakers at conferences and similar events.
Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions.
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Links to related information

 

Results from first collisions on 23 November 2009

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 eps version of the figure
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This series of three plots uses the ATLAS standard V0 finding code, but removing any constraints on the two-track vertex invariant mass. Two oppositely charged tracks are required to be consistent with orginating at the same point. For these plots the two tracks are each required to have more than three silicon hits, and a transverse momentum greater than 500 MeV. The mass of the vertex is calculated, assuming that both tracks are pions.
The Monte Carlo distribution is normalised to the same area as the data.
 
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kShort_SiTracks_singleGaussFit.png
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An additional cut is applied, to require that the flight path of the V0 candidate points back to the interaction point. The selection is applied on the angle in the transverse plane between the flight direction, defined from the line from the primary vertex to the V0 vertex, and the momentum sum of the tracks. This already reduces the combinatorial background.

kShort_SiTracks_pointing_singleGaussFit.png
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In addition, both tracks are required to have a d0 (impact parameter in the transverse plane relative to the nominal interaction point) greater than 4mm, which further reduces the background.

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Beam spot stability - x position vs Lumi Block
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First alignment update with collision data

During 2008 and 2009, a large sample of cosmic ray tracks was used to align the Inner Detector. Since these tracks tend to be vertical, they are much more useful for aligning the barrel than the end caps. After only a few days of collision data, the quality of the end cap alignment was dramatically improved, as shown in the following plots, where the position and orientation of end cap disks is updated. The most notable change is an improvement in the alignment residuals for SCT end cap C.

SCT barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles).

Approved_SCTBarResX.png
eps version of the figure
SCT endcap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). Approved_SCTECAResX.png
eps version of the figure
SCT endcap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). Approved_SCTECCResX.png
eps version of the figure
PIxel barrel local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). Approved_PixBarResX.png
eps version of the figure
PIxel end cap A local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). Approved_PixECAResX.png
eps version of the figure
PIxel end cap C local x residuals for a minimum bias Monte Carlo sample with perfect alignment (solid blue), collision data using the alignment based on cosmic rays (open black squares) and after a first update using collision data (open red circles). Approved_PixECCResX.png
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Revision 112009-12-14 - KirillProkofiev

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X and Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
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X and Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
display_142165_lg.gif
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X and Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
>
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X and Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
display_142165_tr.gif
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X distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
>
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X distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
display_142165_x.gif
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Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
>
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Y distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
display_142165_y.gif
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Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
>
>
Z distribution of position of primary vertices for the run 142165. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
 
display_142165_z.gif
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META FILEATTACHMENT attachment="display_142165_x.gif" attr="" comment="Distribution of X coordinate of reconstructed primary vertices" date="1260648340" name="display_142165_x.gif" path="display_142165_x.gif" size="11672" stream="display_142165_x.gif" tmpFilename="/usr/tmp/CGItemp24225" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_y.gif" attr="" comment="Distribution of Y coordinate of reconstructed primary vertices" date="1260648374" name="display_142165_y.gif" path="display_142165_y.gif" size="11582" stream="display_142165_y.gif" tmpFilename="/usr/tmp/CGItemp24265" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_z.gif" attr="" comment="Distribution of Z coordinate of reconstructed primary vertices." date="1260648414" name="display_142165_z.gif" path="display_142165_z.gif" size="11924" stream="display_142165_z.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"
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META FILEATTACHMENT attachment="display_142165_lg.eps" attr="" comment="" date="1260779361" name="display_142165_lg.eps" path="display_142165_lg.eps" size="17030" stream="display_142165_lg.eps" tmpFilename="/usr/tmp/CGItemp33143" user="kprok" version="1"
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Revision 102009-12-12 - PippaWells

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META TOPICPARENT name="AtlasResults"
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X and Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_lg.gif
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X and Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_tr.gif
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 X distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
display_142165_x.gif
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 Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit.
display_142165_y.gif
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Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_z.gif
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Revision 92009-12-12 - KirillProkofiev

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META TOPICPARENT name="AtlasResults"
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Added:
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X and Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_lg.gif
eps version of the figure
X and Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_tr.gif
eps version of the figure
X distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_x.gif
eps version of the figure
Y distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_y.gif
eps version of the figure
Z distribution of position of primary vertices for the run 142165. The plot is produced using the InDetPriVxFinder and FullBiolloirVertexFitter. The pt cut for incoming tracks is lowered to 100 MeV. Tracks contributing less than chi2 value of 15 (per two degrees of freedom) to the reconstructed vertex are accepted to the fit. display_142165_z.gif
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Line: 241 to 295
 
META FILEATTACHMENT attachment="SCTX.png" attr="" comment="SCT Barrel X Residual" date="1260632721" name="SCTX.png" path="SCTX.png" size="17976" stream="SCTX.png" tmpFilename="/usr/tmp/CGItemp2742" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXX.eps" attr="" comment="" date="1260634401" name="PIXX.eps" path="PIXX.eps" size="17564" stream="PIXX.eps" tmpFilename="/usr/tmp/CGItemp2521" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX.eps" attr="" comment="" date="1260634435" name="SCTX.eps" path="SCTX.eps" size="17654" stream="SCTX.eps" tmpFilename="/usr/tmp/CGItemp2489" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
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META FILEATTACHMENT attachment="display_142165_lg.gif" attr="" comment="longitudinal beam profile as seen in PV reconstruction" date="1260648259" name="display_142165_lg.gif" path="display_142165_lg.gif" size="18750" stream="display_142165_lg.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_tr.gif" attr="" comment="transverse beam profile as seen in the PV reconstruction" date="1260648303" name="display_142165_tr.gif" path="display_142165_tr.gif" size="17836" stream="display_142165_tr.gif" tmpFilename="/usr/tmp/CGItemp24237" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_x.gif" attr="" comment="Distribution of X coordinate of reconstructed primary vertices" date="1260648340" name="display_142165_x.gif" path="display_142165_x.gif" size="11672" stream="display_142165_x.gif" tmpFilename="/usr/tmp/CGItemp24225" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_y.gif" attr="" comment="Distribution of Y coordinate of reconstructed primary vertices" date="1260648374" name="display_142165_y.gif" path="display_142165_y.gif" size="11582" stream="display_142165_y.gif" tmpFilename="/usr/tmp/CGItemp24265" user="kprok" version="1"
META FILEATTACHMENT attachment="display_142165_z.gif" attr="" comment="Distribution of Z coordinate of reconstructed primary vertices." date="1260648414" name="display_142165_z.gif" path="display_142165_z.gif" size="11924" stream="display_142165_z.gif" tmpFilename="/usr/tmp/CGItemp24315" user="kprok" version="1"

Revision 82009-12-12 - unknown

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META TOPICPARENT name="AtlasResults"
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Unbiased x residual distribution, integrated over all hits-on-tracks in the pixel barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. PIXX.png
eps version of the figure
Unbiased x residual distribution, integrated over all hits-on-tracks in the SCT barrel. The x residual is defined as the measured hit position minus the expected hit position from the track extrapolation, projected onto the local x coordinate (the precision coordinate). The distribution is shown for the 900 GeV collisions run 141749, compared with a minimum bias Monte Carlo simulation sample reconstructed with perfect ID alignment. The distributions are normalised to equal area. A track selection requiring pT>2.0 GeV, |d0| < 10mm, N(Pix+SCT)Hits>=6 and nTRTHits>=15 is applied. SCTX.png
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caption figure
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META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" attr="" comment="Beam spot z vs LB" date="1260621283" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" size="17939" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" tmpFilename="/usr/tmp/CGItemp50110" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" attr="" comment="Beam spot z vs LB" date="1260618635" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" size="18471" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" tmpFilename="/usr/tmp/CGItemp50252" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" attr="" comment="Beam spot y vs LB" date="1260618764" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" size="18564" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png" tmpFilename="/usr/tmp/CGItemp50245" user="pippa" version="1"
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META FILEATTACHMENT attachment="PIXX.png" attr="" comment="Pixel Barrel X residual" date="1260632675" name="PIXX.png" path="PIXX.png" size="18396" stream="PIXX.png" tmpFilename="/usr/tmp/CGItemp2529" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX.png" attr="" comment="SCT Barrel X Residual" date="1260632721" name="SCTX.png" path="SCTX.png" size="17976" stream="SCTX.png" tmpFilename="/usr/tmp/CGItemp2742" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="PIXX.eps" attr="" comment="" date="1260634401" name="PIXX.eps" path="PIXX.eps" size="17564" stream="PIXX.eps" tmpFilename="/usr/tmp/CGItemp2521" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"
META FILEATTACHMENT attachment="SCTX.eps" attr="" comment="" date="1260634435" name="SCTX.eps" path="SCTX.eps" size="17654" stream="SCTX.eps" tmpFilename="/usr/tmp/CGItemp2489" user="b_2ed_2ecooper_40qmul_2eac_2euk" version="1"

Revision 72009-12-12 - PippaWells

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First results with stable beams

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First results with stable beams at 900 GeV

 

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Beam spot stability - x position vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png
eps version of the figure
Beam spot stability - y position vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.png
eps version of the figure
Beam spot stability - z position vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png
eps version of the figure
Beam spot stability - x width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png
eps version of the figure
Beam spot stability - y width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png
eps version of the figure
Beam spot stability - z width vs Lumi Block data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png
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caption figure
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META FILEATTACHMENT attachment="kShort_SiTracks_pointing_singleGaussFit.png" attr="" comment="" date="1260563906" name="kShort_SiTracks_pointing_singleGaussFit.png" path="kShort_SiTracks_pointing_singleGaussFit.png" size="24638" stream="kShort_SiTracks_pointing_singleGaussFit.png" tmpFilename="/usr/tmp/CGItemp49572" user="pippa" version="1"
META FILEATTACHMENT attachment="kShort_SiTracks_singleGaussFit.eps" attr="" comment="" date="1260563928" name="kShort_SiTracks_singleGaussFit.eps" path="kShort_SiTracks_singleGaussFit.eps" size="19891" stream="kShort_SiTracks_singleGaussFit.eps" tmpFilename="/usr/tmp/CGItemp49529" user="pippa" version="1"
META FILEATTACHMENT attachment="kShort_SiTracks_singleGaussFit.png" attr="" comment="" date="1260563948" name="kShort_SiTracks_singleGaussFit.png" path="kShort_SiTracks_singleGaussFit.png" size="24165" stream="kShort_SiTracks_singleGaussFit.png" tmpFilename="/usr/tmp/CGItemp49608" user="pippa" version="1"
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META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.eps" attr="" comment="Beam spot width x vs LB" date="1260617926" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.eps" size="18206" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.eps" tmpFilename="/usr/tmp/CGItemp50096" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png" attr="" comment="Beam spot width x vs LB" date="1260618116" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png" size="18114" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigx.png" tmpFilename="/usr/tmp/CGItemp50252" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.eps" attr="" comment="Beam spot width y vs LB" date="1260618146" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.eps" size="18212" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.eps" tmpFilename="/usr/tmp/CGItemp50308" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png" attr="" comment="Beam spot width y vs LB" date="1260618172" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png" size="18127" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigy.png" tmpFilename="/usr/tmp/CGItemp50210" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.eps" attr="" comment="Beam spot width z vs LB" date="1260618199" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.eps" size="18328" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.eps" tmpFilename="/usr/tmp/CGItemp50205" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png" attr="" comment="Beam spot width z vs LB" date="1260618402" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png" size="93952" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.sigz.png" tmpFilename="/usr/tmp/CGItemp50334" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.eps" attr="" comment="Beam spot x vs LB" date="1260618487" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.eps" size="18751" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.eps" tmpFilename="/usr/tmp/CGItemp50244" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png" attr="" comment="Beam spot x vs LB" date="1260618552" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png" size="19670" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.x.png" tmpFilename="/usr/tmp/CGItemp50120" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" attr="" comment="Beam spot y vs LB" date="1260618581" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" size="18107" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.y.eps" tmpFilename="/usr/tmp/CGItemp50267" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" attr="" comment="Beam spot z vs LB" date="1260621283" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" size="17939" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.eps" tmpFilename="/usr/tmp/CGItemp50110" user="pippa" version="1"
META FILEATTACHMENT attachment="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" attr="" comment="Beam spot z vs LB" date="1260618635" name="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" path="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" size="18471" stream="data09_900GeV.00141749.physics_MinBias-VTX.n4-LR2-nt.root.z.png" tmpFilename="/usr/tmp/CGItemp50252" user="pippa" version="1"
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Revision 62009-12-12 - PippaWells

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An additional cut is applied, to require that the flight path of the V0 candidate points back to the interaction point.

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 momentum sum of the tracks. This already reduces the combinatorial background.

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In addition, both tracks are required to have a d0 (impact parameter in the transverse plane relative to the nominal interaction point) greater than 4mm,
 which further reduces the background.

Revision 52009-12-11 - PippaWells

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This series of three plots uses the ATLAS standard V0 finding code, but removing any constraints on the two-track vertex invariant mass. Two oppositely charged tracks are required to be consistent with orginating at the same point. For these plots the two tracks are each required to have more than three silicon hits, and a transverse momentum greater than 500 MeV. The mass of the vertex is calculated, assuming that both tracks are pions.
The Monte Carlo distribution is normalised to the same area as the data.

kShort_SiTracks_singleGaussFit.png
eps version of the figure

An additional cut is applied, to require that the flight path of the V0 candidate points back to the interaction point. The selection is applied on the angle between the flight direction, defined from the line from the primary vertex to the V0 vertex, and the momentum sum of the tracks. This already reduces the combinatorial background.

kShort_SiTracks_pointing_singleGaussFit.png
eps version of the figure

In addition, both tracks are required to have a d0 (impact parameter relative to the nominal interaction point) greater than 4mm, which further reduces the background.

kShort_SiTracks_pointing_D0_singleGaussFit.png
eps version of the figure

 
caption figure
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META FILEATTACHMENT attachment="HitScatter23Nov.eps" attr="" comment="" date="1260551348" name="HitScatter23Nov.eps" path="HitScatter23Nov.eps" size="146816" stream="HitScatter23Nov.eps" tmpFilename="/usr/tmp/CGItemp50150" user="pippa" version="1"
META FILEATTACHMENT attachment="HitScatter11Dec.eps" attr="" comment="" date="1260552104" name="HitScatter11Dec.eps" path="HitScatter11Dec.eps" size="233976" stream="HitScatter11Dec.eps" tmpFilename="/usr/tmp/CGItemp50109" user="pippa" version="1"
META FILEATTACHMENT attachment="HitScatter11Dec.png" attr="" comment="" date="1260552199" name="HitScatter11Dec.png" path="HitScatter11Dec.png" size="37962" stream="HitScatter11Dec.png" tmpFilename="/usr/tmp/CGItemp49984" user="pippa" version="1"
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META FILEATTACHMENT attachment="kShort_SiTracks_pointing_D0_singleGaussFit.eps" attr="" comment="" date="1260563841" name="kShort_SiTracks_pointing_D0_singleGaussFit.eps" path="kShort_SiTracks_pointing_D0_singleGaussFit.eps" size="17795" stream="kShort_SiTracks_pointing_D0_singleGaussFit.eps" tmpFilename="/usr/tmp/CGItemp49676" user="pippa" version="1"
META FILEATTACHMENT attachment="kShort_SiTracks_pointing_D0_singleGaussFit.png" attr="" comment="" date="1260563864" name="kShort_SiTracks_pointing_D0_singleGaussFit.png" path="kShort_SiTracks_pointing_D0_singleGaussFit.png" size="22908" stream="kShort_SiTracks_pointing_D0_singleGaussFit.png" tmpFilename="/usr/tmp/CGItemp49750" user="pippa" version="1"
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META FILEATTACHMENT attachment="kShort_SiTracks_pointing_singleGaussFit.png" attr="" comment="" date="1260563906" name="kShort_SiTracks_pointing_singleGaussFit.png" path="kShort_SiTracks_pointing_singleGaussFit.png" size="24638" stream="kShort_SiTracks_pointing_singleGaussFit.png" tmpFilename="/usr/tmp/CGItemp49572" user="pippa" version="1"
META FILEATTACHMENT attachment="kShort_SiTracks_singleGaussFit.eps" attr="" comment="" date="1260563928" name="kShort_SiTracks_singleGaussFit.eps" path="kShort_SiTracks_singleGaussFit.eps" size="19891" stream="kShort_SiTracks_singleGaussFit.eps" tmpFilename="/usr/tmp/CGItemp49529" user="pippa" version="1"
META FILEATTACHMENT attachment="kShort_SiTracks_singleGaussFit.png" attr="" comment="" date="1260563948" name="kShort_SiTracks_singleGaussFit.png" path="kShort_SiTracks_singleGaussFit.png" size="24165" stream="kShort_SiTracks_singleGaussFit.png" tmpFilename="/usr/tmp/CGItemp49608" user="pippa" version="1"

Revision 42009-12-11 - PippaWells

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TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png
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Scatter plot of hits on tracks in the first collision events. TRT hits are shown in blue, and SCT hits in red. The pixel detector was not switched on, and the SCT was running at reduced voltage. The solenoid magnetic field was zero, so tracks are straight.
 
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HitScatter23Nov.png
eps version of the figure
Distribution of impact parameter, d0, of tracks in first collision events. d023Nov.png
eps version of the figure

First results with stable beams

Scatter plot of hits on barrel tracks in the first collision events with stable beams. TRT hits are shown in blue, SCT in red, and Pixel in green. The solenoid is at full field, and the curved tracks can clearly be seen in the TRT. HitScatter11Dec.png
eps version of the figure
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META FILEATTACHMENT attachment="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" attr="" comment="Shift in z0 of tracks with RF cogging" date="1260268938" name="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" path="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" size="13400" stream="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" tmpFilename="/usr/tmp/CGItemp21744" user="pippa" version="1"
META FILEATTACHMENT attachment="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png" attr="" comment="Shift in z0 of tracks wtih RF cogging" date="1260268962" name="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png" path="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png" size="18258" stream="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png" tmpFilename="/usr/tmp/CGItemp21954" user="pippa" version="1"
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META FILEATTACHMENT attachment="d023Nov.png" attr="" comment="" date="1260551304" name="d023Nov.png" path="d023Nov.png" size="12735" stream="d023Nov.png" tmpFilename="/usr/tmp/CGItemp50122" user="pippa" version="1"
META FILEATTACHMENT attachment="d023Nov.eps" attr="" comment="" date="1260551315" name="d023Nov.eps" path="d023Nov.eps" size="8570" stream="d023Nov.eps" tmpFilename="/usr/tmp/CGItemp49949" user="pippa" version="1"
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Revision 32009-12-08 - PippaWells

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 Approved plots that can be shown by ATLAS speakers at conferences and similar events.
Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions.
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Figures

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Results from first collisions on 23 November 2009

 
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Shift in z0 of tracks as a result of RF cogging.
This plot was made from the best quality collision candidates recorded by ATLAS on 23 November, and selecting tracks with at least 6 SCT hits, more than 10 TRT hits and |d0|<10mm (distance of closest approach to the nominal beam line). The distribution in red is for luminosity blocks LB<140 (before RF adjustment) and in blue for LB>145 (after RF adjustment). The shift in z0 is consistent with the 12cm expected from beam pick up measurements of the arrival times of the beams.
 
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TrackZposition_140541_f175_silverEvents_newLabels_largerBins.png
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Links

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Responsible: PippaWells
 
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META FILEATTACHMENT attachment="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" attr="" comment="Shift in z0 of tracks with RF cogging" date="1260268938" name="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" path="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" size="13400" stream="TrackZposition_140541_f175_silverEvents_newLabels_largerBins.eps" tmpFilename="/usr/tmp/CGItemp21744" user="pippa" version="1"
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Revision 22009-11-27 - AndreasHoecker

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META TOPICPARENT name="AtlasResults"
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Inner Detector results from collision data

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Public Inner Detector Plots for Collision Data

 
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Introduction

Approved plots that can be shown by ATLAS speakers at conferences and similar events.
Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions.

 
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Introduction

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Changed:
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Major updates:
-- PippaWells - 27-Nov-2009

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Or replace the complete REVINFO tag (including percentages symbols) with a name in the form TwikiUsersName-->
Responsible: PippaWells
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<!--Please add the name of someone who is responsible for this page so that he/she can be contacted if changes are needed.
The creator's name will be added by default, but this can be replaced if appropriate.
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Responsible: Project leaders
 
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Revision 12009-11-27 - PippaWells

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META TOPICPARENT name="AtlasResults"
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If you have any comments/complaints about this template, then please email : Patrick Jussel (patrick dot jussel at cern dot ch) and/or Maria Smizanska (maria dot smizanska at cern dot ch)
-->

<!-- By default the title is the WikiWord used to create this topic -->
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<!---------------------------------------------------------  snip snip ----------------------------------------------------------------->

Inner Detector results from collision data

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Introduction

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Main heading

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<!--***********************************************************-->
<!--Do NOT remove the remaining lines, but add requested info as appropriate-->
<!--***********************************************************-->


<!--For significant updates to the topic, consider adding your 'signature' (beneath this editing box)-->
Major updates:
-- PippaWells - 27-Nov-2009

<!--Person responsible for the page: 
Either leave as is - the creator's name will be inserted; 
Or replace the complete REVINFO tag (including percentages symbols) with a name in the form TwikiUsersName-->
Responsible: PippaWells
<!--Once this page has been reviewed, please add the name and the date e.g. StephenHaywood - 31 Oct 2006 -->
Last reviewed by: Never reviewed
 
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