Cargando…
Development of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectors
98-037 We report on the development of large area hybrid photo diodes (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 win...
Autores principales: | , , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
1998
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/684681 |
_version_ | 1780901465816039424 |
---|---|
author | Chesi, Enrico Guido Filthaut, F Go, A Joram, C Séguinot, Jacques Ypsilantis, Thomas |
author_facet | Chesi, Enrico Guido Filthaut, F Go, A Joram, C Séguinot, Jacques Ypsilantis, Thomas |
author_sort | Chesi, Enrico Guido |
collection | CERN |
description | 98-037 We report on the development of large area hybrid photo diodes (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$^2$ 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 transmittive bialkali photocathodes (K$_2$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-684681 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1998 |
record_format | invenio |
spelling | cern-6846812019-09-30T06:29:59Zhttp://cds.cern.ch/record/684681engChesi, Enrico GuidoFilthaut, FGo, AJoram, CSéguinot, JacquesYpsilantis, ThomasDevelopment of large area hybrid photodiodes for the LHCb ring imaging Cherenkov detectorsDetectors and Experimental Techniques98-037 We report on the development of large area hybrid photo diodes (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$^2$ 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 transmittive bialkali photocathodes (K$_2$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.LHCb-98-037oai:cds.cern.ch:6846811998-12-17 |
spellingShingle | Detectors and Experimental Techniques Chesi, Enrico Guido Filthaut, F Go, A Joram, C Séguinot, Jacques 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 | http://cds.cern.ch/record/684681 |
work_keys_str_mv | AT chesienricoguido developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors AT filthautf developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors AT goa developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors AT joramc developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors AT seguinotjacques developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors AT ypsilantisthomas developmentoflargeareahybridphotodiodesforthelhcbringimagingcherenkovdetectors |