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.

Figures

Responsible: PippaWells
Last reviewed by: Never reviewed

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
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.
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.
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.
Topic attachments
I Attachment History Action Size Date Who Comment
png PixResX_NewT_D0Z0cut_Mat_vsNominal.png r2 r1 manage 33.4 K 2008-12-11 - 19:11 TobiasGolling Pixel x residuals
png PixResY_NewT_D0Z0cut.png r2 r1 manage 40.6 K 2008-12-11 - 19:12 TobiasGolling Pixel y residuals
png SCTResX_NewT_D0Z0cut.png r2 r1 manage 31.8 K 2008-12-11 - 19:13 TobiasGolling SCT x residuals
eps Approved_DeltaD0.eps r1 manage 32.0 K 2009-03-05 - 14:19 TobiasGolling Delta D0 from cosmic tracks broken down in 2 legs
png Approved_DeltaD0.png r1 manage 30.6 K 2009-03-05 - 14:19 TobiasGolling Delta D0 from cosmic tracks broken down in 2 legs
eps Approved_DeltaPhi.eps r1 manage 49.1 K 2009-03-05 - 14:20 TobiasGolling Delta Phi from cosmic tracks broken down in 2 legs
png Approved_DeltaPhi.png r1 manage 31.4 K 2009-03-05 - 14:21 TobiasGolling Delta Phi from cosmic tracks broken down in 2 legs
eps Approved_DeltaQoPT.eps r1 manage 17.6 K 2009-03-05 - 14:21 TobiasGolling Delta QopT from cosmic tracks broken down in 2 legs
png Approved_DeltaQoPT.png r1 manage 29.8 K 2009-03-05 - 14:21 TobiasGolling Delta QopT from cosmic tracks broken down in 2 legs
eps Approved_DeltaZ0.eps r1 manage 26.0 K 2009-03-05 - 14:21 TobiasGolling Delta Z0 from cosmic tracks broken down in 2 legs
png Approved_DeltaZ0.png r1 manage 32.7 K 2009-03-05 - 14:22 TobiasGolling Delta Z0 from cosmic tracks broken down in 2 legs
eps Approved_PixBarResX.eps r1 manage 28.5 K 2009-03-05 - 14:22 TobiasGolling Pixel x residuals
png Approved_PixBarResX.png r1 manage 32.8 K 2009-03-05 - 14:23 TobiasGolling Pixel x residuals
eps Approved_PixBarResY.eps r1 manage 38.8 K 2009-03-05 - 14:23 TobiasGolling Pixel y residuals
png Approved_PixBarResY.png r1 manage 39.7 K 2009-03-05 - 14:23 TobiasGolling Pixel y residuals
eps Approved_SCTBarResX.eps r1 manage 27.5 K 2009-03-05 - 14:24 TobiasGolling SCT x residuals
png Approved_SCTBarResX.png r1 manage 31.5 K 2009-03-05 - 14:24 TobiasGolling SCT x residuals
gif 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
gif IDCosmic08_statistics.gif r1 manage 60.4 K 2009-02-13 - 09:33 ChristianSchmitt
pdf IDCosmic08_statistics.pdf r1 manage 18.0 K 2009-02-13 - 09:33 ChristianSchmitt
eps trackpar_QoverP.eps r1 manage 12.9 K 2009-03-09 - 14:16 PippaWells
png trackpar_QoverP.png r1 manage 8.1 K 2009-03-09 - 14:15 PippaWells
eps trackpar_d0.eps r1 manage 11.3 K 2009-03-09 - 14:18 PippaWells
png trackpar_d0.png r1 manage 7.8 K 2009-03-09 - 14:18 PippaWells
eps trackpar_eta.eps r1 manage 9.5 K 2009-03-09 - 14:17 PippaWells
png trackpar_eta.png r1 manage 6.1 K 2009-03-09 - 14:17 PippaWells
eps trackpar_phi0.eps r1 manage 12.5 K 2009-03-09 - 14:17 PippaWells
png trackpar_phi0.png r1 manage 8.3 K 2009-03-09 - 14:17 PippaWells
eps trackpar_theta0.eps r1 manage 10.4 K 2009-03-09 - 14:15 PippaWells
png trackpar_theta0.png r1 manage 6.9 K 2009-03-09 - 14:14 PippaWells
eps trackpar_z0.eps r1 manage 12.3 K 2009-03-09 - 14:14 PippaWells
png trackpar_z0.png r1 manage 8.5 K 2009-03-09 - 14:13 PippaWells

This topic: AtlasPublic > ApprovedDetectorPlots > ApprovedPlotsID
Topic revision: r20 - 2009-03-17 - PippaWells

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