Cargando…

Calibration of the CMS Electromagnetic Calorimeter

Calibration is one of the factors that set limits on the ultimate performance of the CMS electromagnetic calorimeter (ECAL) at LHC. In situ calibration with physics events will be the main tool to reduce the constant term in the energy dependent resolution function to the design goal of 0.5 %. At th...

Descripción completa

Detalles Bibliográficos
Autor principal: Paramatti, R
Lenguaje:eng
Publicado: 2003
Materias:
Acceso en línea:http://cds.cern.ch/record/687847
_version_ 1780901804538593280
author Paramatti, R
author_facet Paramatti, R
author_sort Paramatti, R
collection CERN
description Calibration is one of the factors that set limits on the ultimate performance of the CMS electromagnetic calorimeter (ECAL) at LHC. In situ calibration with physics events will be the main tool to reduce the constant term in the energy dependent resolution function to the design goal of 0.5 %. At the start of detector operation, a fast intercalibration method, based on phi symmetry in minimum bias events, will be used, exploiting the uniformity of energy deposition as a function of phi at a given eta. Energetic electrons from Z -> e^+e^- decays will be recorded at a sufficiently high rate, even at the initial low luminosity, to provide an intercalibration of calorimeter regions and to set the absolute energy scale. Once the Tracker has been commissioned, intercalibration of different crystals within a single module may be achieved using E/p measurement of isolated electrons. This cal ibration strategy will be described in detail and illustrated with simulated results.
id cern-687847
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6878472019-09-30T06:29:59Zhttp://cds.cern.ch/record/687847engParamatti, RCalibration of the CMS Electromagnetic CalorimeterDetectors and Experimental TechniquesCalibration is one of the factors that set limits on the ultimate performance of the CMS electromagnetic calorimeter (ECAL) at LHC. In situ calibration with physics events will be the main tool to reduce the constant term in the energy dependent resolution function to the design goal of 0.5 %. At the start of detector operation, a fast intercalibration method, based on phi symmetry in minimum bias events, will be used, exploiting the uniformity of energy deposition as a function of phi at a given eta. Energetic electrons from Z -> e^+e^- decays will be recorded at a sufficiently high rate, even at the initial low luminosity, to provide an intercalibration of calorimeter regions and to set the absolute energy scale. Once the Tracker has been commissioned, intercalibration of different crystals within a single module may be achieved using E/p measurement of isolated electrons. This cal ibration strategy will be described in detail and illustrated with simulated results.CMS-CR-2003-002oai:cds.cern.ch:6878472003-02-18
spellingShingle Detectors and Experimental Techniques
Paramatti, R
Calibration of the CMS Electromagnetic Calorimeter
title Calibration of the CMS Electromagnetic Calorimeter
title_full Calibration of the CMS Electromagnetic Calorimeter
title_fullStr Calibration of the CMS Electromagnetic Calorimeter
title_full_unstemmed Calibration of the CMS Electromagnetic Calorimeter
title_short Calibration of the CMS Electromagnetic Calorimeter
title_sort calibration of the cms electromagnetic calorimeter
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/687847
work_keys_str_mv AT paramattir calibrationofthecmselectromagneticcalorimeter