Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter

Along with quality assurance of ~1000 hybrid photodiode tubes for CMS, a subset were subjected to long term testing of their properties over time. Over the course of several years, the tubes were operated under non-uniform illumination at rates up to 3.75 nW per pixel and for total integrated charge...

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Detalles Bibliográficos
Autores principales: Cushman, Priscilla, Sherwood, Brian
Lenguaje:eng
Publicado: 2007
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1103002
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author Cushman, Priscilla
Sherwood, Brian
author_facet Cushman, Priscilla
Sherwood, Brian
author_sort Cushman, Priscilla
collection CERN
description Along with quality assurance of ~1000 hybrid photodiode tubes for CMS, a subset were subjected to long term testing of their properties over time. Over the course of several years, the tubes were operated under non-uniform illumination at rates up to 3.75 nW per pixel and for total integrated charges of up to 7 C at the anode. In-situ measurements of quantum efficiency and gain, coupled with periodic photocathode uniformity scans, dark current and cross talk, provide information on expected time-dependent changes in the tube photo-sensitivity and some indication of possible failure modes.
id cern-1103002
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
record_format invenio
spelling cern-11030022019-09-30T06:29:59Zhttp://cds.cern.ch/record/1103002engCushman, PriscillaSherwood, BrianLifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic CalorimeterDetectors and Experimental TechniquesAlong with quality assurance of ~1000 hybrid photodiode tubes for CMS, a subset were subjected to long term testing of their properties over time. Over the course of several years, the tubes were operated under non-uniform illumination at rates up to 3.75 nW per pixel and for total integrated charges of up to 7 C at the anode. In-situ measurements of quantum efficiency and gain, coupled with periodic photocathode uniformity scans, dark current and cross talk, provide information on expected time-dependent changes in the tube photo-sensitivity and some indication of possible failure modes.CMS-NOTE-2008-011oai:cds.cern.ch:11030022007-10-19
spellingShingle Detectors and Experimental Techniques
Cushman, Priscilla
Sherwood, Brian
Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title_full Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title_fullStr Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title_full_unstemmed Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title_short Lifetime Studies of the 19-channel Hybrid Photodiode for the CMS Hadronic Calorimeter
title_sort lifetime studies of the 19-channel hybrid photodiode for the cms hadronic calorimeter
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1103002
work_keys_str_mv AT cushmanpriscilla lifetimestudiesofthe19channelhybridphotodiodeforthecmshadroniccalorimeter
AT sherwoodbrian lifetimestudiesofthe19channelhybridphotodiodeforthecmshadroniccalorimeter

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