Tools for the Inspection of PWO//APD Gluing

The light produced in each of the 60 thousand PWO crystals of the CMS barrel electromagnetic calorimeter will be readout by Avalanche Photodiodes ( APD). The ratio detected to emitted photons also depends on the PWO//APD gluing quality that must be checked before the crystal mounting in the calorime...

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Detalles Bibliográficos
Autores principales: Baccaro, Stefania, Borgia, Bruno, Cavallari, Francesca, Dafinei, Ioan, Diemoz, Marcella, Longo, Egidio, Montecchi, Marco, Organtini, Giovanni
Lenguaje:eng
Publicado: 1998
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/687014
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author Baccaro, Stefania
Borgia, Bruno
Cavallari, Francesca
Dafinei, Ioan
Diemoz, Marcella
Longo, Egidio
Montecchi, Marco
Organtini, Giovanni
author_facet Baccaro, Stefania
Borgia, Bruno
Cavallari, Francesca
Dafinei, Ioan
Diemoz, Marcella
Longo, Egidio
Montecchi, Marco
Organtini, Giovanni
author_sort Baccaro, Stefania
collection CERN
description The light produced in each of the 60 thousand PWO crystals of the CMS barrel electromagnetic calorimeter will be readout by Avalanche Photodiodes ( APD). The ratio detected to emitted photons also depends on the PWO//APD gluing quality that must be checked before the crystal mounting in the calorimeter. In this paper two different tools are proposed: one for the visual inspection of the glue layer and the other for the quantitative evaluation of transmittance improvement when the glue replaces the air at the PWO//APD interface. Both the instruments are rugged and cheap. A sequence of operations and checks on the gluing to be done in the Regional Centres is proposed.
id cern-687014
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-6870142019-09-30T06:29:59Zhttp://cds.cern.ch/record/687014engBaccaro, StefaniaBorgia, BrunoCavallari, FrancescaDafinei, IoanDiemoz, MarcellaLongo, EgidioMontecchi, MarcoOrgantini, GiovanniTools for the Inspection of PWO//APD GluingDetectors and Experimental TechniquesThe light produced in each of the 60 thousand PWO crystals of the CMS barrel electromagnetic calorimeter will be readout by Avalanche Photodiodes ( APD). The ratio detected to emitted photons also depends on the PWO//APD gluing quality that must be checked before the crystal mounting in the calorimeter. In this paper two different tools are proposed: one for the visual inspection of the glue layer and the other for the quantitative evaluation of transmittance improvement when the glue replaces the air at the PWO//APD interface. Both the instruments are rugged and cheap. A sequence of operations and checks on the gluing to be done in the Regional Centres is proposed.CMS-NOTE-1998-024oai:cds.cern.ch:6870141998-04-20
spellingShingle Detectors and Experimental Techniques
Baccaro, Stefania
Borgia, Bruno
Cavallari, Francesca
Dafinei, Ioan
Diemoz, Marcella
Longo, Egidio
Montecchi, Marco
Organtini, Giovanni
Tools for the Inspection of PWO//APD Gluing
title Tools for the Inspection of PWO//APD Gluing
title_full Tools for the Inspection of PWO//APD Gluing
title_fullStr Tools for the Inspection of PWO//APD Gluing
title_full_unstemmed Tools for the Inspection of PWO//APD Gluing
title_short Tools for the Inspection of PWO//APD Gluing
title_sort tools for the inspection of pwo//apd gluing
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/687014
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