期刊
出版社
ELSEVIER
DOI: 10.1016/j.nima.2010.08.089
关键词
RPC; CMS; Gas; Purifier detectors HEP muon
The CMS RPC muon detector utilizes a gas recirculation system called closed loop (CL) to cope with large gas mixture volumes and costs. A systematic study of CL gas purifiers has been carried out over 400 days between July 2008 and August 2009 at CERN in a low-radiation test area, with the use of RPC chambers with currents monitoring, and gas analysis sampling points. The study aimed to fully clarify the presence of pollutants, the chemistry of purifiers used in the CL, and the regeneration procedure. Preliminary results on contaminants release and purifier characterization are reported. (C) 2010 Elsevier B.V. All rights reserved.
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