Approved Combined Inner Detector Plots

Introduction

The Inner Detector commissioning and performance plots below are approved to be shown by ATLAS speakers at conferences and similar events.

Please do not add figures on your own. Contact the ID project leader in case of questions and/or suggestions.

Figures

Detector alignment

Residual distribution in x, integrated over all hits-on-tracks in the pixel barrel for the nominal geometry and the preliminary aligned geometry. 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|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A double Gaus fit is performed but only the mean and sigma of the narrower Gaussian are shown.
Approved_PixBarResX.eps
Residual distribution in y, integrated over all hits-on-tracks in the pixel barrel for the nominal geometry and the preliminary aligned geometry. 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 y coordinate, which is the non-precision coordinate. Tracks are selected to have pT > 2 GeV, |d0|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A single Gaussian fit is performed.
Approved_PixBarResY.eps
Residual distribution in x, integrated over all hits-on-tracks in the SCT barrel for the nominal geometry and the preliminary aligned geometry. 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|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A single Gaussian fit is performed.
Approved_SCTBarResX.eps
TRT residual for combined tracks before and after TRT alignment. The alignment includes a global alignment with respect to the Pixel and SCT, as well as an internal module level alignment.

Description: The plot show TRT residual distribution from cosmic data with the solenoid on (run 91900). Tracks are required to have pT >2 GeV, event phase between 5 and 30 ns, >= 45 TRT hits, >= 2 Pixel hits, >= 9 SCT hits, and no endcap hits. A single Gaussian fit to the core of the distribution (+/- 0.3 mm) is done, and the mean and sigma of the fit are reported. The distribution is made in athena release 15 (-tag=15.0.0) and using ID alignment tags InDet_Cosmics_2008_03 and TRT_Cosmics_2008_06.


TRTBarrelResidualCombinedTracks.eps
Cosmic tracks crossing the entire ID leave hits in both the upper and lower halves of the ID. These tracks can be split near the interaction point and fit separately, resulting in two collision-like tracks that can then be compared. The plots shows the difference in the d0 track parameter between the two split tracks. Tracks are selected to have pT > 2 GeV, |d0|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). Tracks also are required to have a hit in the Pixel B layer, 3 Pixel hits and in total 7 Silicon hits. The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A single Gaussian fit is performed.
Approved_DeltaD0.eps
Cosmic tracks crossing the entire ID leave hits in both the upper and lower halves of the ID. These tracks can be split near the interaction point and fit separately, resulting in two collision-like tracks that can then be compared. The plots shows the difference in the z0 track parameter between the two split tracks. Tracks are selected to have pT > 2 GeV, |d0|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). Tracks also are required to have a hit in the Pixel B layer, 3 Pixel hits and in total 7 Silicon hits. The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A single Gaussian fit is performed.
Approved_DeltaZ0.eps
Cosmic tracks crossing the entire ID leave hits in both the upper and lower halves of the ID. These tracks can be split near the interaction point and fit separately, resulting in two collision-like tracks that can then be compared. The plots shows the difference in the Q/pT track parameter between the two split tracks. Tracks are selected to have pT > 2 GeV, |d0|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). Tracks also are required to have a hit in the Pixel B layer, 3 Pixel hits and in total 7 Silicon hits. The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A single Gaus fit is performed.
Approved_DeltaQoPT.eps
Cosmic tracks crossing the entire ID leave hits in both the upper and lower halves of the ID. These tracks can be split near the interaction point and fit separately, resulting in two collision-like tracks that can then be compared. The plots shows the difference in the phi track parameter between the two split tracks. Tracks are selected to have pT > 2 GeV, |d0|<50mm, |z0|<400mm (in other words they are required to go through the pixel L0). Tracks also are required to have a hit in the Pixel B layer, 3 Pixel hits and in total 7 Silicon hits. The distribution is shown for 5 cosmic runs: 91885, 91888, 91890, 91891, 91900, all have solenoid on - corresponding to ~25% of all the solenoid-on data taken in Sep/Oct 2008. New Tracking is used (in 14.5.2.1). A double Gaussian fit is performed but only the mean and sigma of the narrower Gaus are shown.
Approved_DeltaPhi.eps

Distributions from cosmic ray tracks

Warning: Cosmic ray spectra including comparisons with MC which appeared before on this page are not approved for external use at this stage. The MC does not model some details of the special cosmic trigger configuration and timing. It includes the two main access shafts, but not the two lift shafts. Until these effects are taken into account, the MC-data comparison is not useful.

Cosmic muons crossing the entire ATLAS detector leave hits in the Inner Detector (ID) and so tracks can be reconstructed. Two different tracking algorithms are in use for the reconstruction: the CTB (Cosmics and Test Beam) tracking and the New Tracking. The results below show the performance of the CTB.

Tracks are characterized by 5 parameters. These are defined in a reference point, the perigee, which is the point of closest approach to the z/beam axis. d0 is the signed distance to the z-axis, z0 is the z-coordinate of the perigee, phi0 is the angle in the x-y plane at the perigee, theta0 is the angle with the z-axis and q/p is the charge of the cosmic muon divided by its momentum.

In the next plots, the parameters of these cosmic muon tracks (reconstructed with CTB tracking and release 14.5.0.5, AtlasProduction) from the ATLAS combined cosmic run 91890 (Autumn 2008) are shown. Both toroid and solenoid were on during this run.

For the theta0 and z0 distributions, tracks are required to have Silicon hits (since these parameters are not measured by the TRT barrel).

Cosmic spectra (d0 distribution) as seen in run 91890.
eps figure
Cosmic spectra (z0 distribution) as seen in run 91890.
eps figure
Cosmic spectra (phi0 distribution) as seen in run 91890.
eps figure
Cosmic spectra (theta0 distribution) as seen in run 91890.
eps figure
Cosmic spectra (QoverP distribution) as seen in run 91890.
eps figure

Cosmic ray track statistics

Collected track statistics in autumn 2008:
  field off field on total
All tracks 4940000 2670000 7610000
SCT hit 1150000 880000 2030000
Pixel hit 230000 190000 420000

pdf figure

Event displays

Inner detector event display for event 757427 of the cosmic run 90270 with field ON. curvedcosmic6.png
Inner detector event display for event 62340 of the cosmic run 90731 (no Solenoid). Showing hits on track for both TRT endcaps, as well as SCT and pixel barrel and endcap hits. barrel_endcaptrack.png

Comparison of NewTracking and CTBTracking

Comparison of NewTracking versus CTB Tracking for real data from the IDCosmic stream of run 91885 (field ON) reconstructed in the first reprocessing in December 2008.

The following cuts have ben applied:

  • 2*nPixelHits+nSCTHits>=8
  • number of TRT hits >=40
  • pT >= 5 GeV

Distribution of pt for NewTracking and CTB Tracking.
eps figure
Distribution of q/p for NewTracking and CTB Tracking.
eps figure
Number of Hits (nPixel+nSCT+nTRT) on the track.
eps figure
Distribution of d0 for NewTracking and CTB Tracking.
eps figure
Distribution of phi0 for NewTracking and CTB Tracking.
eps figure
Distribution of z0 for NewTracking and CTB Tracking.
eps figure
Distribution of η for NewTracking and CTB Tracking. The double-peak structure at η ≈ -0.4 und η ≈ 0.3 is due to the construction shafts through which the ATLAS detector was lowered into the cavern.


eps figure
Figure description ... figure

Links


Responsible: PippaWells
Last reviewed by: Never reviewed

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecD0.eps r1 manage 14.6 K 2009-03-20 - 18:26 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecD0.png r1 manage 7.8 K 2009-03-20 - 18:26 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecEta.eps r1 manage 13.4 K 2009-03-20 - 18:25 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecEta.png r1 manage 6.9 K 2009-03-20 - 18:25 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecPhi0.eps r1 manage 13.9 K 2009-03-20 - 18:25 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecPhi0.png r1 manage 7.2 K 2009-03-20 - 18:25 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecPt.eps r1 manage 16.0 K 2009-03-20 - 18:25 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecPt.png r1 manage 7.7 K 2009-03-20 - 18:24 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecQoverP.eps r1 manage 11.2 K 2009-03-20 - 18:24 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecQoverP.png r1 manage 7.1 K 2009-03-20 - 18:24 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_RecZ0.eps r1 manage 16.9 K 2009-03-20 - 18:23 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_RecZ0.png r1 manage 8.2 K 2009-03-20 - 18:23 ChristianSchmitt  
Unknown file formateps 91885_IDCosmic_NewTVsCTB_nHits.eps r1 manage 15.3 K 2009-03-20 - 18:24 ChristianSchmitt  
PNGpng 91885_IDCosmic_NewTVsCTB_nHits.png r1 manage 7.7 K 2009-03-20 - 18:23 ChristianSchmitt  
Unknown file formateps Approved_DeltaD0.eps r1 manage 32.0 K 2009-03-05 - 14:19 TobiasGolling Delta D0 from cosmic tracks broken down in 2 legs
PNGpng Approved_DeltaD0.png r1 manage 30.6 K 2009-03-05 - 14:19 TobiasGolling Delta D0 from cosmic tracks broken down in 2 legs
Unknown file formateps Approved_DeltaPhi.eps r1 manage 49.1 K 2009-03-05 - 14:20 TobiasGolling Delta Phi from cosmic tracks broken down in 2 legs
PNGpng Approved_DeltaPhi.png r1 manage 31.4 K 2009-03-05 - 14:21 TobiasGolling Delta Phi from cosmic tracks broken down in 2 legs
Unknown file formateps Approved_DeltaQoPT.eps r1 manage 17.6 K 2009-03-05 - 14:21 TobiasGolling Delta QopT from cosmic tracks broken down in 2 legs
PNGpng Approved_DeltaQoPT.png r1 manage 29.8 K 2009-03-05 - 14:21 TobiasGolling Delta QopT from cosmic tracks broken down in 2 legs
Unknown file formateps Approved_DeltaZ0.eps r1 manage 26.0 K 2009-03-05 - 14:21 TobiasGolling Delta Z0 from cosmic tracks broken down in 2 legs
PNGpng Approved_DeltaZ0.png r1 manage 32.7 K 2009-03-05 - 14:22 TobiasGolling Delta Z0 from cosmic tracks broken down in 2 legs
Unknown file formateps Approved_PixBarResX.eps r1 manage 28.5 K 2009-03-05 - 14:22 TobiasGolling Pixel x residuals
PNGpng Approved_PixBarResX.png r1 manage 32.8 K 2009-03-05 - 14:23 TobiasGolling Pixel x residuals
Unknown file formateps Approved_PixBarResY.eps r1 manage 38.8 K 2009-03-05 - 14:23 TobiasGolling Pixel y residuals
PNGpng Approved_PixBarResY.png r1 manage 39.7 K 2009-03-05 - 14:23 TobiasGolling Pixel y residuals
Unknown file formateps Approved_SCTBarResX.eps r1 manage 27.5 K 2009-03-05 - 14:24 TobiasGolling SCT x residuals
PNGpng Approved_SCTBarResX.png r1 manage 31.5 K 2009-03-05 - 14:24 TobiasGolling SCT x residuals
GIFgif Atlas_ID_Loops_ON_cy_2008.gif r1 manage 20.9 K 2009-03-09 - 14:19 SaverioDAuria Number of ID Cooling Loops ON as a function of time
GIFgif IDCosmic08_statistics.gif r1 manage 60.4 K 2009-02-13 - 09:33 ChristianSchmitt  
PDFpdf IDCosmic08_statistics.pdf r1 manage 18.0 K 2009-02-13 - 09:33 ChristianSchmitt  
PNGpng PixResX_NewT_D0Z0cut_Mat_vsNominal.png r2 r1 manage 33.4 K 2008-12-11 - 19:11 TobiasGolling Pixel x residuals
PNGpng PixResY_NewT_D0Z0cut.png r2 r1 manage 40.6 K 2008-12-11 - 19:12 TobiasGolling Pixel y residuals
PNGpng SCTResX_NewT_D0Z0cut.png r2 r1 manage 31.8 K 2008-12-11 - 19:13 TobiasGolling SCT x residuals
Unknown file formateps TRTBarrelResidualCombinedTracks.eps r1 manage 43.3 K 2009-04-14 - 14:49 ChristianSchmitt  
PNGpng TRTBarrelResidualCombinedTracks.png r1 manage 24.6 K 2009-04-14 - 14:49 ChristianSchmitt  
Unknown file formateps trackpar_QoverP.eps r1 manage 12.9 K 2009-03-09 - 14:16 PippaWells  
PNGpng trackpar_QoverP.png r1 manage 8.1 K 2009-03-09 - 14:15 PippaWells  
Unknown file formateps trackpar_d0.eps r1 manage 11.3 K 2009-03-09 - 14:18 PippaWells  
PNGpng trackpar_d0.png r1 manage 7.8 K 2009-03-09 - 14:18 PippaWells  
Unknown file formateps trackpar_eta.eps r1 manage 9.5 K 2009-03-09 - 14:17 PippaWells  
PNGpng trackpar_eta.png r1 manage 6.1 K 2009-03-09 - 14:17 PippaWells  
Unknown file formateps trackpar_phi0.eps r1 manage 12.5 K 2009-03-09 - 14:17 PippaWells  
PNGpng trackpar_phi0.png r1 manage 8.3 K 2009-03-09 - 14:17 PippaWells  
Unknown file formateps trackpar_theta0.eps r1 manage 10.4 K 2009-03-09 - 14:15 PippaWells  
PNGpng trackpar_theta0.png r1 manage 6.9 K 2009-03-09 - 14:14 PippaWells  
Unknown file formateps trackpar_z0.eps r1 manage 12.3 K 2009-03-09 - 14:14 PippaWells  
PNGpng trackpar_z0.png r1 manage 8.5 K 2009-03-09 - 14:13 PippaWells  
Edit | Attach | Watch | Print version | History: r46 | r25 < r24 < r23 < r22 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r23 - 2009-05-04 - PippaWells
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    Atlas All webs login

  • Edit
  • Attach
This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback