PERFORMANCE OF GAS GAIN MONITORING SYSTEM OF THE CMS RPC SYSTEM

The RPC muon system of experiment CMS at the LHC (CERN, Geneva Switzerland) is equipped with a Gas Gain Monitoring (GGM) system. The GGM is composed of twelve square single-gap RPC chambers in a cosmic ray hodoscope. Each chambers working point is continuously monitored to detect changes among fresh...

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Detalles Bibliográficos
Autor principal: Benussi, Luigi
Lenguaje:eng
Publicado: 2014
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1754123
Descripción
Sumario:The RPC muon system of experiment CMS at the LHC (CERN, Geneva Switzerland) is equipped with a Gas Gain Monitoring (GGM) system. The GGM is composed of twelve square single-gap RPC chambers in a cosmic ray hodoscope. Each chambers working point is continuously monitored to detect changes among fresh, before purifiers, after purifiers gas mixtures. The GGM has been in operation for the whole duration of 2011-2012 data taking period. Weekly efficiency scans were performed and gas problems were detected. A report of both performance and experience gained is given.

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