Difference: BeamSpotPublicResults (1 vs. 8)

Revision 82017-12-12 - AnthonyMorley

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META TOPICPARENT name="WebHome"
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2017 25ns pp Collisions, √s = 13 TeV

Interaction Density
The variation of the average interaction density at the centre of the beamspot as a function of average interactions per bunch crossing for the last two months of high luminosity pp data taking in 2017. During this period the LHC was using the 8b4e filling scheme.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/Run_335000_MusigmaZVsMuW.png
pdf file
Beamspot Length
The variation of the beamspot length as a function of average interactions per bunch crossing for the last two months of high luminosity pp data taking in 2017. During this period the LHC was using the 8b4e filling scheme.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/Run_335000_sigmaZVsMuW.png
pdf file
 

2015 25ns pp Collisions, √s = 13 TeV

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META FILEATTACHMENT attachment="beamspot-plot-posY-2015_25ns.eps" attr="h" comment="2015 25ns beamspot positions" date="1448964583" name="beamspot-plot-posY-2015_25ns.eps" path="beamspot-plot-posY-2015_25ns.eps" size="52575" user="amorley" version="1"
META FILEATTACHMENT attachment="beamspot-plot-posY-2015_25ns.gif" attr="h" comment="2015 25ns beamspot positions" date="1448964583" name="beamspot-plot-posY-2015_25ns.gif" path="beamspot-plot-posY-2015_25ns.gif" size="15051" user="amorley" version="1"
META FILEATTACHMENT attachment="beamspot-plot-posY-2015_25ns.pdf" attr="h" comment="2015 25ns beamspot positions" date="1448964583" name="beamspot-plot-posY-2015_25ns.pdf" path="beamspot-plot-posY-2015_25ns.pdf" size="147003" user="amorley" version="1"
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META FILEATTACHMENT attachment="Run_335000_sigmaZVsMuW.pdf" attr="h" comment="2017 Beamspot density plots" date="1513060952" name="Run_335000_sigmaZVsMuW.pdf" path="Run_335000_sigmaZVsMuW.pdf" size="18508" user="amorley" version="1"
META FILEATTACHMENT attachment="Run_335000_sigmaZVsMuW.png" attr="h" comment="2017 Beamspot density plots" date="1513060952" name="Run_335000_sigmaZVsMuW.png" path="Run_335000_sigmaZVsMuW.png" size="56043" user="amorley" version="1"
META FILEATTACHMENT attachment="Run_335000_MusigmaZVsMuW.png" attr="h" comment="2017 Beamspot density plots" date="1513060952" name="Run_335000_MusigmaZVsMuW.png" path="Run_335000_MusigmaZVsMuW.png" size="61621" user="amorley" version="1"
META FILEATTACHMENT attachment="Run_335000_MusigmaZVsMuW.pdf" attr="h" comment="2017 Beamspot density plots" date="1513060952" name="Run_335000_MusigmaZVsMuW.pdf" path="Run_335000_MusigmaZVsMuW.pdf" size="16539" user="amorley" version="1"

Revision 72015-12-01 - AnthonyMorley

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META TOPICPARENT name="WebHome"
AtlasPublicTopicHeader.png
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2015 25ns pp Collisions, √s = 13 TeV

x Position
Position in x of the centroid of the luminous region in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-posX-2015_25ns.gif
eps file, pdf file
y Position
Position in y of the centroid of the luminous region in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-posY-2015_25ns.gif
eps file, pdf file
z Position
Position in z of the centroid of the luminous region in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-posZ-2015_25ns.gif
eps file, pdf file
x Size
The size of the luminous region in x in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-sigmaX-2015_25ns.gif
eps file, pdf file
y Size
The size of the luminous region in y in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-sigmaY-2015_25ns.gif
eps file, pdf file
z Size
The size of the luminous region in z in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-sigmaZ-2015_25ns.gif
eps file, pdf file
y Size
Horizontal tilt of the luminous region of the luminous region in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-tiltX-2015_25ns.gif
eps file, pdf file
z Size
Vertical tilt of the luminous region of the luminous region in ATLAS over the course of the 25 ns pp running in 2015 at √s = 13 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over five minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-plot-tiltY-2015_25ns.gif
eps file, pdf file
 

2015 pp Collisions, √s = 900 GeV

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META FILEATTACHMENT attachment="beamspot-plot-tiltY-2015_25ns.eps" attr="h" comment="2015 25ns beamspot positions" date="1448964477" name="beamspot-plot-tiltY-2015_25ns.eps" path="beamspot-plot-tiltY-2015_25ns.eps" size="373067" user="amorley" version="1"
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Revision 62015-06-02 - MikeHance

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META TOPICPARENT name="WebHome"
AtlasPublicTopicHeader.png
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2015 pp Collisions, √s = 900 GeV

x Position
Position of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_posX.png
eps file, pdf file
y Position
Position of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_posY.png
eps file, pdf file
z Position
Position of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_posZ.png
eps file, pdf file
x Size
Transverse width of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.Size of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20. The change in the transverse width when the IBL turns on is not expected to be due to real changes in the LHC beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_sigmaX.png
eps file, pdf file
y Size
Transverse width of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.Size of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20. The change in the transverse width when the IBL turns on is not expected to be due to real changes in the LHC beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_sigmaY.png
eps file, pdf file
z Size
Longitudinal width of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.Size of the reconstructed beamspot as a function of time for LHC fill 3683. The outer layers of the pixel detector were turned on at 21:33, the second layer of the pixel detector was turned on at 21:50, and the innermost tracking layer (IBL) was turned on at 22:20.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/data15_comm_00264034_physics_MinBias_sigmaZ.png
eps file, pdf file

 

2012 pp Collisions

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Revision 52014-02-28 - EricTorrence

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Introduction

Here any results related to ATLAS beam-spot measurements are given.

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Unless stated otherwise, all positions and angles are measured with respect to the ATLAS coordinate system, which has its origin in the center of the detector, with the positive x-axis, +x, pointing to the center of the ring, +y pointing upwards, and +z pointing along the outgoing beam 2 (which runs counter-clockwise around the ring).

The precise position of the origin as well as the orientation of the coordinate axes are defined as the result of a multi-level alignment procedure performed on the ATLAS Inner Detector. Due to their high sensitivity, the x and y positions of the origin are constrained such that subsequent alignments reproduce the original values within errors. The system was rotated to minimize the residual tilt angles.

 

Publications and Conference Results

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2011/2012 pp Collisions

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2012 pp Collisions

x Position in 2012
Position in x of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-posX.gif
eps file
y Position in 2012
Position in y of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The large movement at the beginning of May was associated with movement of the inner detector.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-posY.gif
eps file
z Position in 2012
Position in z of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-posZ.gif
eps file
x Size in 2012
Size in x of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The variation in each fill is due to transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-sigmaX.gif
eps file
y Size in 2012
Size in y of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The variation in each fill is due to transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-sigmaY.gif
eps file
z Size in 2012
Size in z of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The variation in each fill reflects bunch lengthening in the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-sigmaZ.gif
eps file
x-z Tilt in 2012
Horizontal tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-tiltX.gif
eps file
y-z Tilt in 2012
Vertical tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-2012-plot-tiltY.gif
eps file

2012 pp Collisions - Single Fill

x Position
Position in x of the centroid of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-posX.gif
eps file
y Position
Position in y of the centroid of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The movement at the beginning of the run is observed consistently in 2012.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-posY.gif
eps file
z Position
Position in z of the centroid of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-posZ.gif
eps file
x Size
Size in x of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The increase in size during the fill is expected from the transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-sigmaX.gif
eps file
y Size
Size in y of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The increase in size during the fill is expected from the transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-sigmaY.gif
eps file
z Size
Size in z of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The increase in size during the fill reflects bunch lengthening in the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-sigmaZ.gif
eps file
x-y Tilt
Horizontal tilt of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-tiltX.gif
eps file
y-z Tilt
Vertical tilt of the luminous region in ATLAS during LHC fill 3351. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-plot-tiltY.gif
eps file
Vertex x distribution
Vertex x distribution during LHC fill 3351, between 12:29-12:39 CET, together with a projection of the 3D Gaussian beam spot fit. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-fitman-x.png
eps file
Vertex y distribution
Vertex y distribution during LHC fill 3351, between 12:29-12:39 CET, together with a projection of the 3D Gaussian beam spot fit. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-fitman-y.png
eps file
Vertex z distribution
Vertex z distribution during LHC fill 3351, between 12:29-12:39 CET, together with a projection of the 3D Gaussian beam spot fit. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-fitman-z.png
eps file
Vertex x-y distribution
Vertex x-y distribution during LHC fill 3351. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-vtx-yx.gif
eps file
Vertex x-z distribution
Vertex x-z distribution during LHC fill 3351. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-vtx-xz.gif
eps file
Vertex y-z distribution
Vertex y-z distribution during LHC fill 3351. In each event, only the vertex with the highest ∑track pT2 is included. Vertices are required to have at least 5 tracks.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/beamspot-run215456-vtx-yz.gif
eps file

2011 pp Collisions

 
x Position in 2011
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 eps file
Deleted:
<
<
x Position in 2012
Position in x of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posX_2012.gif
eps file
y Position in 2012
Position in y of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The large movement at the beginning of May was associated with movement of the inner detector.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posY_2012.gif
eps file
z Position in 2012
Position in z of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posZ_2012.gif
eps file
x Width in 2012
Size in x of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaX_2012.gif
eps file
y Width in 2012
Size in y of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaY_2012.gif
eps file
z Width in 2011
Size in z of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaZ_2012.gif
eps file
x-z Tilt in 2012
Horizontal tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltX_2012.gif
eps file
y-z Tilt in 2012
Vertical tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltY_2012.gif
eps file
 

2010 pp Collisions

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Added:
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Obsolete Plots

The plots shown here have been superseded by results presented above. These plots are kept here as a historical record.

x Position in 2012
Position in x of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posX_2012.gif
eps file
y Position in 2012
Position in y of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The large movement at the beginning of May was associated with movement of the inner detector.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posY_2012.gif
eps file
z Position in 2012
Position in z of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posZ_2012.gif
eps file
x Width in 2012
Size in x of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaX_2012.gif
eps file
y Width in 2012
Size in y of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaY_2012.gif
eps file
z Width in 2012
Size in z of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaZ_2012.gif
eps file
x-z Tilt in 2012
Horizontal tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltX_2012.gif
eps file
y-z Tilt in 2012
Vertical tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltY_2012.gif
eps file
 
<!-- For significant updates to the topic, consider adding your 'signature' (beneath this editing box) -->
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Revision 42012-08-03 - MartinaHurwitz

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Publications and Conference Results

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2011/2012 pp Collisions

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x Width in 2011 in one fill
Size in x of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The growth of the beamspot during a fill is expected from the transverse-emittance growth of the beams.
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y Width in 2011 in one fill
Size in y of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The growth of the beamspot during a fill is expected from the transverse-emittance growth of the beams.
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z Width in 2011 in one fill
Size in z of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The growth of the beamspot during a fill is expected from the longitudinal-emittance growth of the beams.
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2010 pp Collisions

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 file

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 file

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
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
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Revision 32012-08-02 - MartinaHurwitz

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y-z Tilt in 2011
Vertical tilt of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltY_2011.gif
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x Position in 2012
Position in x of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posX_2012.gif
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y Position in 2012
Position in y of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The large movement at the beginning of May was associated with movement of the inner detector.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posY_2012.gif
eps file
z Position in 2012
Position in z of the centroid of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posZ_2012.gif
eps file
x Width in 2012
Size in x of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaX_2012.gif
eps file
y Width in 2012
Size in y of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaY_2012.gif
eps file
z Width in 2011
Size in z of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaZ_2012.gif
eps file
x-z Tilt in 2012
Horizontal tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltX_2012.gif
eps file
y-z Tilt in 2012
Vertical tilt of the luminous region in ATLAS over the course of pp running in 2012 at √s = 8 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltY_2012.gif
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Revision 22012-08-02 - MartinaHurwitz

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PLEASE READ, if your page is NOT related to a public ATLAS result (otherwise remove this disclaimer)
  1. Change the Subject: (very bottom) e.g. to "grid", "detector", etc.
  2. You are NOT allowed to place any link from the WebHome page or any Public results page to your new page
  3. You should NOT use the %ATLASPUBLICHEADER% at the very top of your page.
For questions: please do not hesitate to contat atlas-twiki-support@cernNOSPAMPLEASE.ch
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BeamSpotPublicResults

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2011/2012 pp Collisions

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x Position in 2011
Position in x of the centroid of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
 
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y Position in 2011
Position in y of the centroid of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posY_2011.gif
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z Position in 2011
Position in z of the centroid of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/posZ_2011.gif
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x Width in 2011
Size in x of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The decrease in beamspot size in September was due to changes in the beam optics reducing the β*.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaX_2011.gif
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x Width in 2011 in one fill
Size in x of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The growth of the beamspot during a fill is expected from the transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaX_r186729.gif
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y Width in 2011
Size in y of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The decrease in beamspot size in September was due to changes in the beam optics reducing the β*.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaY_2011.gif
eps file
y Width in 2011 in one fill
Size in y of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. The size is corrected for the transverse vertex resolution. Errors are statistical only. The growth of the beamspot during a fill is expected from the transverse-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaY_r186729.gif
eps file
z Width in 2011
Size in z of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaZ_2011.gif
eps file
z Width in 2011 in one fill
Size in z of the luminous region in ATLAS over the course of one fill in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The growth of the beamspot during a fill is expected from the longitudinal-emittance growth of the beams.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/sigmaZ_r186729.gif
eps file
x-z Tilt in 2011
Horizontal tilt of the luminous region in ATLAS over the course of pp running in 2011 at √s = 7 TeV. The data points are the result of a maximum likelihood fit to the spatial distribution of primary vertices collected over ten minutes. Errors are statistical only. The tilt is defined with respect to the ATLAS coordinate system.
/twiki/pub/AtlasPublic/BeamSpotPublicResults/tiltX_2011.gif
eps file
 
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Revision 12012-07-31 - JamieBoyd

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META TOPICPARENT name="WebHome"
PLEASE READ, if your page is NOT related to a public ATLAS result (otherwise remove this disclaimer)
  1. Change the Subject: (very bottom) e.g. to "grid", "detector", etc.
  2. You are NOT allowed to place any link from the WebHome page or any Public results page to your new page
  3. You should NOT use the %ATLASPUBLICHEADER% at the very top of your page.
For questions: please do not hesitate to contat atlas-twiki-support@cernNOSPAMPLEASE.ch
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AtlasPublicTopicHeader.png

BeamSpotPublicResults

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Introduction

Here any results related to ATLAS beam-spot measurements are given.

Publications and Conference Results

Non Collision Background:

2011/2012 pp Collisions

Title
caption
/twiki/pub/AtlasPublic/BeamSpotPublicResults/BcmSpecificRatePaper_2011.png
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<!-- For significant updates to the topic, consider adding your 'signature' (beneath this editing box) -->
Major updates:
-- JamieBoyd - 31-Jul-2012

<!-- Person responsible for the page: 
Either leave as is - the creator's name will be inserted; 
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Responsible: JamieBoyd
Subject: public
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