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Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking

TileCal is the hadronic calorimeter covering the most central region of ATLAS experiment at the LHC. This sampling calorimeter uses iron plates as absorber and plastic scintillating tiles as the active material. Scintillation light produced in the tiles is transmitted by wavelength shifting fibers t...

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Autor principal: Dubreuil, E
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1556086
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author Dubreuil, E
author_facet Dubreuil, E
author_sort Dubreuil, E
collection CERN
description TileCal is the hadronic calorimeter covering the most central region of ATLAS experiment at the LHC. This sampling calorimeter uses iron plates as absorber and plastic scintillating tiles as the active material. Scintillation light produced in the tiles is transmitted by wavelength shifting fibers to photomultipliers tubes (PMTs). The resulting electronic signals from the approximatively 10000 PMTs are measured and digitized every 25 ns before being transferred to off-detector data-acquisition systems. A set of calibration systems allow to monitor and equalize the calorimeter at each stage of the signal production, from scintillation light to digitization. This calibration suite is based on signal generation from different sources: A Cs radioactive source, laser light, charge injection and charge integration over thousands of bunch crossings of minimum bias events produced in proton-proton collisions. This contribution presents a brief description of the different TileCal calibration systems and their performances. It elaborates on the methodology of using and combining the individual systems’ measurements to preserve the calorimeter cell energy scale stable at the % level. The contribution to the LHC luminosity monitoring and measurement is also discussed.
id cern-1556086
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
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spelling cern-15560862019-09-30T06:29:59Zhttp://cds.cern.ch/record/1556086engDubreuil, ECalibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-takingDetectors and Experimental TechniquesTileCal is the hadronic calorimeter covering the most central region of ATLAS experiment at the LHC. This sampling calorimeter uses iron plates as absorber and plastic scintillating tiles as the active material. Scintillation light produced in the tiles is transmitted by wavelength shifting fibers to photomultipliers tubes (PMTs). The resulting electronic signals from the approximatively 10000 PMTs are measured and digitized every 25 ns before being transferred to off-detector data-acquisition systems. A set of calibration systems allow to monitor and equalize the calorimeter at each stage of the signal production, from scintillation light to digitization. This calibration suite is based on signal generation from different sources: A Cs radioactive source, laser light, charge injection and charge integration over thousands of bunch crossings of minimum bias events produced in proton-proton collisions. This contribution presents a brief description of the different TileCal calibration systems and their performances. It elaborates on the methodology of using and combining the individual systems’ measurements to preserve the calorimeter cell energy scale stable at the % level. The contribution to the LHC luminosity monitoring and measurement is also discussed.ATL-TILECAL-SLIDE-2013-360oai:cds.cern.ch:15560862013-06-17
spellingShingle Detectors and Experimental Techniques
Dubreuil, E
Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title_full Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title_fullStr Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title_full_unstemmed Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title_short Calibrating and preserving the energy scale of the Tile Calorimeter cells during four years of LHC data-taking
title_sort calibrating and preserving the energy scale of the tile calorimeter cells during four years of lhc data-taking
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1556086
work_keys_str_mv AT dubreuile calibratingandpreservingtheenergyscaleofthetilecalorimetercellsduringfouryearsoflhcdatataking