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Public Liquid-Argon Calorimeter Plots on Detector Status

Introduction

The LAr 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 LAr project leader in case of questions and/or suggestions.

Detector Description

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperReadiness/LAr_Labeled.gif eps
https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/LARG3-TDR-barrelM_samplings_presamp_new.png eps

These numbers are here for reference and to be used when describing the Liquid Argon Calorimeter. They are extracted from the ATLAS Detector paper.

pdf file with corresponding page numbers http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/ExpectedPerf.jpg
https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/LAr-segmentation-table.jpg

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/ChannelCount.jpg

Readout Electronics

The two schematics are documented in the ATLAS Detector paper (Calorimeter chapter 5)

Liquid Argon Readout Electronics Chain https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/LArReadout_5.28.jpg eps pdf
Liquid Argon Front End Board Schematics https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/feb_schematics_5.29.jpg eps pdf

Detector Status

Problematic channels summary as of 31.01.2012 (31st of January 2012) and earlier

After Winter 2011-2012 shutdown repairs; before final checks.

EM calorimeter 0.04%
HEC 0.39%
FCal 0.23%
Global 0.06%


Link to ATLAS table

LAr High Voltage Correction http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/LAr_status/hvcorrfactors.gif
HV Corrections (September 2009)
eps

Liquid argon temperature stability and homgeneity

Liquid Argon Temperature

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/TempComparison.gif
Liquid argon temperature stability vs time
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/TempComparisonFcal.gif
Liquid argon temperature stability close to the FCal vs time
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/emba.png
Liquid argon temperature stability barrel A side
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/embc.png
Liquid argon temperature stability barrel C side
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/eca.png
Liquid argon temperature stability endcap A
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/ecc.png
Liquid argon temperature stability endcap C
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/2012EMBdistri-1.gif
Liquid argon temperature homogeneity barrel
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/2012ECAdistri-1.gif
Liquid argon temperature homogeneity endcap A
eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/2012ECCdistri-1.gif
Liquid argon temperature homogeneity endcap C
eps

LAr Purity Stability:

Measured impurity of the liquid argon in the barrel cryostat: Each point shows the mean of the purity values measured during one week starting middle of 2009 until beginning of 2016. Periods between pp-runs are marked gray. Data points during collisions are not taken into account due to high radiation in the calorimeter that lead to signals in the ionization chambers. Most of the monitors show charge-up effects after periods of time without high voltage. The decreasing trend in all monitors is correlated with the data taking periods. A clear explanation is not yet found, a change of other input parameters (like temperature or high voltage of the ionization chambers is excluded). The leap of the measured purity in barrel A4 at the beginning of 2009 is unclear; a connection with an actual improvement of the purity can be excluded. See here for more information.

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/BARREL_longterm_6.png

eps - pdf

Measured impurity of the liquid argon in the end-cap cryostat on side A: Each point shows the mean of the purity values measured during one week starting middle of 2009 until beginning of 2016. Periods between pp-runs are marked gray. Data points during collisions are not taken into account due to high radiation in the calorimeter that lead to signals in the ionization chambers. Most of the monitors show charge-up effects after periods of time without high voltage. The decreasing trend in all monitors is correlated with the data taking periods. A clear explanation is not yet found, a change of other input parameters (like temperature or high voltage of the ionization chambers is excluded). See here for more information.

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/EMEC_HEC_A_longterm_6.png

eps - pdf

Measured impurity of the liquid argon in the end-cap cryostat on side C: Each point shows the mean of the purity values measured during one week starting middle of 2009 until beginning of 2016. Periods between pp-runs are marked gray. Data points during collisions are not taken into account due to high radiation in the calorimeter that lead to signals in the ionization chambers. Most of the monitors show charge-up effects after periods of time without high voltage. The decreasing trend in all monitors is correlated with the data taking periods. A clear explanation is not yet found, a change of other input parameters (like temperature or high voltage of the ionization chambers is excluded). See here for more information.

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/EMEC_HEC_C_longterm_6.png

eps - pdf

Noise, Calibration, Signal Reconstruction

Total Noise in the Liquid Argon Detector at the Electron Scale (2015)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_data_2015.png
Total noise (electronics and pile-up for <μ> = 14) at the electron scale (data)
eps

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_mc_2015.png
Total noise (electronics and pile-up for <μ> = 14) at the electron scale (MC)
eps

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_2015_ratio.png
Ratio of total noise (electronics and pile-up for <μ> = 14) at the electron scale (data/MC)
eps

Total Noise in the Liquid Argon Detector at the Electron Scale (2011)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_data_mu14.png
Total noise (electronics and pile-up for <μ> = 14) at the electron scale (data)
eps

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_mc_mu14.png
Total noise (electronics and pile-up for <μ> = 14) at the electron scale (MC)
eps

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noise_ratio_mu14.png
Ratio of total noise (electronics and pile-up for <μ> = 14) at the electron scale (data/MC)
eps

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/noiseElec_data.gif
Electronics noise at the electron scale
eps

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/noiseBWnewFCal_conf.gif
Expected Electronics Noise
(eps)
(From the ATLAS Detector paper)

Reconstruction of Missing Energy with Random Events

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/calibration/TopoOnlyLAr.gif
EtMiss 2008(LAr)
eps

https://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/cosmics/Etmiss-LAr-RNDM-2009.gif
EtMiss 2009(LAr)
eps

Calibration stability plots from 2012

Details on calibration procedure

More stability plots from 2012

Stability plots from 2011

Calibration Stability from 2009

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_EM_PEDESTAL_H_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Pedestal stability for LAr-EM in High Gain

eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_FCAL_PEDESTAL_M_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Pedestal stability for LAr-FCal in Medium Gain

eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_HEC_PEDESTAL_M_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Pedestal stability for LAr-HEC in Medium Gain

eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_EM_RAMP_H_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Gain relative stability for LAr-EM in High Gain

eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_FCAL_RAMP_M_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Gain relative stability for LAr-FCal in Medium Gain

eps


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Stability_HEC_RAMP_M_ALL_RED_ON-ON_FT-1_Sl-1_Ch-1_user.png
Gain relative stability for LAr-HEC in Medium Gain

eps


Calibration stability plots from 2011

Details on calibration procedure

More stability plots from 2011

Calibration Stability from 2009

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ped-HG-EM.gif
Pedestal stability for LAr-EM in High Gain


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ped-MG-FCal.gif
Pedestal stability for LAr-FCal in Medium Gain


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ped-MG-HEC.gif
Pedestal stability for LAr-HEC in Medium Gain


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ramp-HG-EM.gif
Gain relative stability for LAr-EM in High Gain


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ramp-MG-FCal.gif
Gain relative stability for LAr-FCal in Medium Gain


https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/Ramp-MG-HEC.gif
Gain relative stability for LAr-HEC in Medium Gain


Energy Reconstruction Formulae

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/calibration/SigRecFormula_Images_Comments-1.gif
Formulae

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/calibration/SigRecFormula_Images_Comments-2.gif
Formulae and explanations

pdf

ppt

Signal Reconstruction Quality Across EM Calorimeter http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/calibration/QFactor.jpg
Signal Reconstruction Quality Across EM Calorimeter
pdf

Ionization Pulse Shape

  • Ionization Pulse Shape EM Barrel

Ionization Pulse Shape in the 4 EM Barrel layers

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/pulse_preS_53051_FormatApproved.gif
(PS)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/pulse_Front_30162_FormatApproved.gif
(Front)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/pulse_Middle_30069_FormatApproved.gif
(Middle)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/pulse_back_31239_FormatApproved.gif
(Back)
(eps)

  • Ionization Pulse Shape EM endap

Ionization Pulse Shape in the EM endcap middle layer

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/ExamplePulseS2_HV2.3_FormatApproved.gif
(Middle,HV=2.3kV)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/ExamplePulseS2_HV2.1_FormatApproved.gif
(Middle,HV=2.1kV)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/ExamplePulseS2_HV1.7_FormatApproved.gif
(Middle,HV=1.7kV)
(eps)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/ExamplePulseS2_HV1.5_FormatApproved.gif
(Middle,HV=1.5kV)
(eps)

  • Ionization Pulse Shape FCal

Ionization Pulse Shape in the FCal

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DriftTime/pulses/FCal/FCal3_Cosmic_Pulse.png
(FCal 3 pulse shape from cosmic muon data)
(eps)

  • Ionization Pulse Shape HEC

Ionization Pulse Shape in the HEC

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DriftTime/pulses/HEC/hec_1.gif
(HEC layer 1 pulse shape)
(eps)

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DriftTime/pulses/HEC/hec_2.gif
(HEC layer 2 pulse shape)
(eps)

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DriftTime/pulses/HEC/hec_3.gif
(HEC layer 3 pulse shape)
(eps)

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DriftTime/pulses/HEC/hec_4.gif
(HEC layer 4 pulse shape)
(eps)

Monitoring plots

LAr Data Quality Inefficiency for 2011 proton-proton data taking - Some details https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/DQInefficiency-pp2011.jpg

LAr Data Quality Inefficiency for 2011 lead-lead data taking - Some details https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/DQInefficiency-pbpb2011.jpg

Noise bursts http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/oddCells92051.gif

Noise bursts fix in the presampler (Winter 08) http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/noiseBurstHV.gif

Pedestals and noise stability

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/oddCells92051_2.gif

Impact of FEB refurbishment (winter 09)

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/febRefurbishment.gif

Monitoring of timing

http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/signalShape87863.gif

DSP computation http://atlas.web.cern.ch/Atlas/GROUPS/LIQARGON/Organization/RefPlots/DQ/DSP.gif

Shutdown 2010-2011 - Splashes 2011

Figure with caption https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/OTxFailureVsTime-March2011.gif
Figure with caption https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/OTxWidthVsSn-March2011.gif
Figure with caption https://twiki.cern.ch/twiki/pub/AtlasPublic/LArCaloPublicResultsDetStatus/SplashEMEC-March2011.gif

The Electronic Peformance Paper

Abstract :
The ATLAS detector has been designed for operation at the Large Hadron Collider at CERN. ATLAS includes electromagnetic and hadronic liquid argon calorimeters, with almost 200,000 channels of data that must be sampled at the LHC bunch crossing frequency of 40 MHz. The calorimeter electronics calibration and readout are performed by custom electronics developed specifically for these purposes. This paper describes the system performance of the ATLAS liquid argon calibration and readout electronics, including noise, energy and time resolution, and long term stability, with data taken mainly from full-system calibration runs performed after installation of the system in the ATLAS detector hall at CERN.

Here is the link to the paper, with all the figures available.


Responsible: MartinAleksa

-- MartinAleksa - 08 Jul 2014

Last reviewed by: Never reviewed

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file formateps BARREL_longterm_6.eps r1 manage 653.4 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
PDFpdf BARREL_longterm_6.pdf r1 manage 56.9 K 2016-05-17 - 18:27 MartinAleksa Purity plots pdf
PNGpng BARREL_longterm_6.png r1 manage 61.4 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
Unknown file formateps EMEC_HEC_A_longterm_6.eps r1 manage 630.9 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
PDFpdf EMEC_HEC_A_longterm_6.pdf r1 manage 50.0 K 2016-05-17 - 18:27 MartinAleksa Purity plots pdf
PNGpng EMEC_HEC_A_longterm_6.png r1 manage 50.8 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
Unknown file formateps EMEC_HEC_C_longterm_6.eps r1 manage 591.3 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
PDFpdf EMEC_HEC_C_longterm_6.pdf r1 manage 42.2 K 2016-05-17 - 18:27 MartinAleksa Purity plots pdf
PNGpng EMEC_HEC_C_longterm_6.png r1 manage 42.8 K 2016-05-17 - 18:29 MartinAleksa Purity Plots eps, png
PDFpdf lar-noise-2015data.pdf r1 manage 151.4 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
Unknown file formateps noise_2015_ratio.eps r1 manage 17.9 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PDFpdf noise_2015_ratio.pdf r1 manage 27.0 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PNGpng noise_2015_ratio.png r1 manage 74.2 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
Unknown file formateps noise_data_2015.eps r1 manage 17.6 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PDFpdf noise_data_2015.pdf r1 manage 27.7 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PNGpng noise_data_2015.png r1 manage 77.0 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
Unknown file formateps noise_mc_2015.eps r1 manage 17.3 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PDFpdf noise_mc_2015.pdf r1 manage 27.1 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
PNGpng noise_mc_2015.png r1 manage 77.3 K 2016-01-25 - 17:07 MartinAleksa LAr total noise plots (2015)
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