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ATLAS LAr Calorimeter Performance in LHC Run-2

Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region $|\eta| < 3.2$, and for hadronic and forward calorimetry in the region from $|\eta| = 1.5$ to $|\eta| = 4.9$. In the first LHC run a total luminosity of 27 fb$^{−1}$ ha...

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Detalles Bibliográficos
Autores principales: Spalla, Margherita, ATLAS LAr Collaboration
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:http://cds.cern.ch/record/2702340
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author Spalla, Margherita
ATLAS LAr Collaboration
author_facet Spalla, Margherita
ATLAS LAr Collaboration
author_sort Spalla, Margherita
collection CERN
description Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region $|\eta| < 3.2$, and for hadronic and forward calorimetry in the region from $|\eta| = 1.5$ to $|\eta| = 4.9$. In the first LHC run a total luminosity of 27 fb$^{−1}$ has been collected at center-of-mass energies of 7-8 TeV. After detector consolidation during a long shutdown, Run-2 started in 2015 and about 150 fb$^{−1}$ of data at a center-of-mass energy of 13 TeV have been recorded. In order to realize the level-1 acceptance rate of 100 kHz in Run-2 data taking, the number of read-out samples recorded and used for the energy and the time measurement has been modified from five to four while keeping the expected performance. The well calibrated and highly granular LAr Calorimeter reached its design values both in energy measurement as well as in direction resolution. This contribution will give an overview of the detector operation, hardware improvements, changes in the monitoring and data quality procedures, to cope with increased pileup, as well as the achieved performance, including the calibration and stability of the electromagnetic scale, noise level, response uniformity and time resolution.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
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spelling cern-27023402019-11-21T22:24:17Zhttp://cds.cern.ch/record/2702340engSpalla, MargheritaATLAS LAr CollaborationATLAS LAr Calorimeter Performance in LHC Run-2Particle Physics - ExperimentLiquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region $|\eta| < 3.2$, and for hadronic and forward calorimetry in the region from $|\eta| = 1.5$ to $|\eta| = 4.9$. In the first LHC run a total luminosity of 27 fb$^{−1}$ has been collected at center-of-mass energies of 7-8 TeV. After detector consolidation during a long shutdown, Run-2 started in 2015 and about 150 fb$^{−1}$ of data at a center-of-mass energy of 13 TeV have been recorded. In order to realize the level-1 acceptance rate of 100 kHz in Run-2 data taking, the number of read-out samples recorded and used for the energy and the time measurement has been modified from five to four while keeping the expected performance. The well calibrated and highly granular LAr Calorimeter reached its design values both in energy measurement as well as in direction resolution. This contribution will give an overview of the detector operation, hardware improvements, changes in the monitoring and data quality procedures, to cope with increased pileup, as well as the achieved performance, including the calibration and stability of the electromagnetic scale, noise level, response uniformity and time resolution.ATL-LARG-SLIDE-2019-859oai:cds.cern.ch:27023402019-11-21
spellingShingle Particle Physics - Experiment
Spalla, Margherita
ATLAS LAr Collaboration
ATLAS LAr Calorimeter Performance in LHC Run-2
title ATLAS LAr Calorimeter Performance in LHC Run-2
title_full ATLAS LAr Calorimeter Performance in LHC Run-2
title_fullStr ATLAS LAr Calorimeter Performance in LHC Run-2
title_full_unstemmed ATLAS LAr Calorimeter Performance in LHC Run-2
title_short ATLAS LAr Calorimeter Performance in LHC Run-2
title_sort atlas lar calorimeter performance in lhc run-2
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2702340
work_keys_str_mv AT spallamargherita atlaslarcalorimeterperformanceinlhcrun2
AT atlaslarcollaboration atlaslarcalorimeterperformanceinlhcrun2