We propose to study features, optimization and commissioning of the CERN Closed Loop gas system used by the RPC muon detectors in experiment CMS at the LHC. Studies include a three-phase campaign both in low-radiation (cosmic rays at the CERN ISR test site) and high-radiation (at the CERN Gamma Irradiation Facility) environment. We describe dedicated RPC chambers tests and chemical analysis of filters and gas used which will allow us to fully characterize the Closed Loop system in view of the upcoming commissioning of the CMS RPC detector.
M. et al. (Sun,) studied this question.