Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors

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We report on the development of large area hybrid photodiodes (HPD) which are one of the proposed photodetectors for the RICH counters of the LHCb experiment. The HPD's consist of a cylindrical vacuum envelope of 127 mm diameter capped with a spherical borosilicate UV- glass entrance window. Fo...

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Detalles Bibliográficos
Autores principales: Braem, André, Chesi, Enrico Guido, Dulinski, W, Filthaut, Frank, Go, A, Joram, C, Lion, G, Séguinot, Jacques, Weilhammer, Peter, Wicht, P, Ypsilantis, Thomas
Lenguaje:eng
Publicado: 1999
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1109/23.775545
http://cds.cern.ch/record/409252
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author Braem, André
Chesi, Enrico Guido
Dulinski, W
Filthaut, Frank
Go, A
Joram, C
Lion, G
Séguinot, Jacques
Weilhammer, Peter
Wicht, P
Ypsilantis, Thomas
author_facet Braem, André
Chesi, Enrico Guido
Dulinski, W
Filthaut, Frank
Go, A
Joram, C
Lion, G
Séguinot, Jacques
Weilhammer, Peter
Wicht, P
Ypsilantis, Thomas
author_sort Braem, André
collection CERN
description We report on the development of large area hybrid photodiodes (HPD) which are one of the proposed photodetectors for the RICH counters of the LHCb experiment. The HPD's consist of a cylindrical vacuum envelope of 127 mm diameter capped with a spherical borosilicate UV- glass entrance window. Focusing electrodes demagnify the image on a silicon detector of 50 mm diameter comprising 2048 pads with a surface of 1 mm/sup 2/ each. The analogue readout electronics is integrated in the vacuum tube. As an intermediate step a HPD with a UV sensitive CsI photocathode has been produced which allowed to verify the electron optics of the HPD. A large UHV evaporation plant for the production of HPD's with visible light transmissive bialkali photocathodes (K/sub 2/CsSb) has been built and successfully operated. The evaporation process is optimized for maximum quantum efficiency and life time of the photocathodes. A cold indium sealing technique developed for a minimum thermal load of the photocathode and the silicon sensor has proven to provide excellent vacuum tightness.
id cern-409252
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-4092522019-09-30T06:29:59Zdoi:10.1109/23.775545http://cds.cern.ch/record/409252engBraem, AndréChesi, Enrico GuidoDulinski, WFilthaut, FrankGo, AJoram, CLion, GSéguinot, JacquesWeilhammer, PeterWicht, PYpsilantis, ThomasDevelopment of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectorsDetectors and Experimental TechniquesWe report on the development of large area hybrid photodiodes (HPD) which are one of the proposed photodetectors for the RICH counters of the LHCb experiment. The HPD's consist of a cylindrical vacuum envelope of 127 mm diameter capped with a spherical borosilicate UV- glass entrance window. Focusing electrodes demagnify the image on a silicon detector of 50 mm diameter comprising 2048 pads with a surface of 1 mm/sup 2/ each. The analogue readout electronics is integrated in the vacuum tube. As an intermediate step a HPD with a UV sensitive CsI photocathode has been produced which allowed to verify the electron optics of the HPD. A large UHV evaporation plant for the production of HPD's with visible light transmissive bialkali photocathodes (K/sub 2/CsSb) has been built and successfully operated. The evaporation process is optimized for maximum quantum efficiency and life time of the photocathodes. A cold indium sealing technique developed for a minimum thermal load of the photocathode and the silicon sensor has proven to provide excellent vacuum tightness.oai:cds.cern.ch:4092521999
spellingShingle Detectors and Experimental Techniques
Braem, André
Chesi, Enrico Guido
Dulinski, W
Filthaut, Frank
Go, A
Joram, C
Lion, G
Séguinot, Jacques
Weilhammer, Peter
Wicht, P
Ypsilantis, Thomas
Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title_full Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title_fullStr Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title_full_unstemmed Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title_short Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
title_sort development of large area hybrid photodiodes for the lhcb ring imaging cherenkov detectors
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1109/23.775545
http://cds.cern.ch/record/409252
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