Double Screening Tests of the CMS ECAL Avalanche Photodiodes

Specially developed avalanche photo-diodes (APDs) will be used to measure the light from the 61,200 lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter. To ensure the reliability over the lifetime of the detector, every APD is screened by irradiation and burn-in before...

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Detalles Bibliográficos
Autores principales: Deiters, Konrad, Ingram, Quentin, Renker, Dieter, Sakhelashvili, Tariel, Britvitch, Ilia, Kuznetsov, Andrey, Musienko, Yuri, Singovsky, Alexander
Lenguaje:eng
Publicado: 2004
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2005.01.088
http://cds.cern.ch/record/787468
Descripción
Sumario:Specially developed avalanche photo-diodes (APDs) will be used to measure the light from the 61,200 lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter. To ensure the reliability over the lifetime of the detector, every APD is screened by irradiation and burn-in before it is accepted for CMS. As part of the establishment of the screening procedure and to determine its effectiveness, a large number of APDs were screened twice. The results of these tests suggest that the required reliability will be achieved.

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