We offer to your attention a preprint “The CMS Muon System” P13-2023-3 issued by the JINR Publishing Department. The author is Viktor Perelygin.

The muon system of the CMS facility (CERN) is presented, which uses detectors of three types: drift tubes, resistive plate chambers, and cathode-strip chambers. The characteristics of the muon system during the period of CMS data taking with p−p collisions in 2016 – 2018 are given. Plans for the development of the muon system under the Phase II CMS upgrade project are presented. The problems of replacing greenhouse gases used in CMS muon detectors with gases with a lower global warming potential are discussed. The results of studying the effects of radiation aging of cathode-strip chambers at the GIF++ facility (CERN) are presented. The possibility of CSC operation with a reduced content of CF₄ in the working gas mixture is being investigated.

The study has been carried out at the Veksler and Baldin Laboratory of High Energy Physics.

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