Aging of large area CsI photocathodes for the ALICE HMPID prototypes

The ALICE HMPID RICH detector is equipped with CsI photocathodes in a MWPC for the detection of Cherenkov photons. The long term operational experience with large area CsI photocathodes will be described. The RICH prototypes have shown a very high stability of operation and performance, at a gain of...

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Autores principales: Di Mauro, A, Braem, André, Davenport, M, Martinengo, P, Nappi, E, Paic, G, Piuz, François, Schyns, E M
Lenguaje:eng
Publicado: 2001
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2003.09.015
http://cds.cern.ch/record/526822
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author Di Mauro, A
Braem, André
Davenport, M
Martinengo, P
Nappi, E
Paic, G
Piuz, François
Schyns, E M
author_facet Di Mauro, A
Braem, André
Davenport, M
Martinengo, P
Nappi, E
Paic, G
Piuz, François
Schyns, E M
author_sort Di Mauro, A
collection CERN
description The ALICE HMPID RICH detector is equipped with CsI photocathodes in a MWPC for the detection of Cherenkov photons. The long term operational experience with large area CsI photocathodes will be described. The RICH prototypes have shown a very high stability of operation and performance, at a gain of 10 \5 and with rates up to 2x10 \4 cm-2 s-1. When exposure to air has been avoided, no degradation of the CsI quantum efficiency has been observed on photocathodes periodically exposed to test-beams over 7 years, corresponding to local integrated charge densities of ~ 1 mC cm-2. The results of limited exposures to oxygen and humidity will also be presented.
id cern-526822
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5268222019-09-30T06:29:59Zdoi:10.1016/j.nima.2003.09.015http://cds.cern.ch/record/526822engDi Mauro, ABraem, AndréDavenport, MMartinengo, PNappi, EPaic, GPiuz, FrançoisSchyns, E MAging of large area CsI photocathodes for the ALICE HMPID prototypesDetectors and Experimental TechniquesThe ALICE HMPID RICH detector is equipped with CsI photocathodes in a MWPC for the detection of Cherenkov photons. The long term operational experience with large area CsI photocathodes will be described. The RICH prototypes have shown a very high stability of operation and performance, at a gain of 10 \5 and with rates up to 2x10 \4 cm-2 s-1. When exposure to air has been avoided, no degradation of the CsI quantum efficiency has been observed on photocathodes periodically exposed to test-beams over 7 years, corresponding to local integrated charge densities of ~ 1 mC cm-2. The results of limited exposures to oxygen and humidity will also be presented.CERN-ALI-2001-033CERN-ALICE-PUB-2001-033oai:cds.cern.ch:5268222001-11-16
spellingShingle Detectors and Experimental Techniques
Di Mauro, A
Braem, André
Davenport, M
Martinengo, P
Nappi, E
Paic, G
Piuz, François
Schyns, E M
Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title_full Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title_fullStr Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title_full_unstemmed Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title_short Aging of large area CsI photocathodes for the ALICE HMPID prototypes
title_sort aging of large area csi photocathodes for the alice hmpid prototypes
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.nima.2003.09.015
http://cds.cern.ch/record/526822
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