The fast photon detection system of COMPASS RICH-1

A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupl...

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Detalles Bibliográficos
Autores principales: Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Kolosov, V N
Lenguaje:eng
Publicado: 2007
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2007.08.018
http://cds.cern.ch/record/1065987
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author Abbon, P
Alekseev, M
Angerer, H
Apollonio, M
Kolosov, V N
author_facet Abbon, P
Alekseev, M
Angerer, H
Apollonio, M
Kolosov, V N
author_sort Abbon, P
collection CERN
description A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2σ π–K separation above 55 GeV/c.
id cern-1065987
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10659872019-09-30T06:29:59Zdoi:10.1016/j.nima.2007.08.018http://cds.cern.ch/record/1065987engAbbon, PAlekseev, MAngerer, HApollonio, MKolosov, V NThe fast photon detection system of COMPASS RICH-1Detectors and Experimental TechniquesA fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2σ π–K separation above 55 GeV/c.oai:cds.cern.ch:10659872007
spellingShingle Detectors and Experimental Techniques
Abbon, P
Alekseev, M
Angerer, H
Apollonio, M
Kolosov, V N
The fast photon detection system of COMPASS RICH-1
title The fast photon detection system of COMPASS RICH-1
title_full The fast photon detection system of COMPASS RICH-1
title_fullStr The fast photon detection system of COMPASS RICH-1
title_full_unstemmed The fast photon detection system of COMPASS RICH-1
title_short The fast photon detection system of COMPASS RICH-1
title_sort fast photon detection system of compass rich-1
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.nima.2007.08.018
http://cds.cern.ch/record/1065987
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