Development of a Uniformisation Procedure for the PbW04 Crystals of the CMS Electromagnetic Calorimeter

The CMS electromagnetic calorimeter will consist of nearly 80,000 lead tungstate crystals, with 18 different geometries. The contribution of any non-uniformity in the light collection to the constant term in the energy resolution must be limited to 0.3%. A procedure capable of achieving this for the...

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Detalles Bibliográficos
Autores principales: Auffray, Etiennette, Davies, Gavin, Lebeau, Michel, Lecoq, Paul, Paoletti, Simone, Schneegans, Marc, Sempere-Roldan, P
Lenguaje:eng
Publicado: 2001
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/687310
Descripción
Sumario:The CMS electromagnetic calorimeter will consist of nearly 80,000 lead tungstate crystals, with 18 different geometries. The contribution of any non-uniformity in the light collection to the constant term in the energy resolution must be limited to 0.3%. A procedure capable of achieving this for the full calorimeter has been developed in the CERN EP-CMA group. A description of this method and the results obtained with the first few hundred pre-production crystals from Bogoroditsk, Russia are given in this note.

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