Speaker
Description
In view of the challenging CMS data taking in HL-LHC phase, an extensive upgrade is underway for the CMS Muon System to ensure its optimal performance in muon triggering and reconstruction. The key role of RPCs, as dedicated muon detectors, will provide relevant timing information, benefiting from their time resolution, to secure sub-bunch crossing event timestamps. To meet the requirements of LHC Phase 2, the RPC system will be expanded to a maximum pseudo-rapidity of 2.4. The forward Muon system's upcoming RE3/1 and RE4/1 stations will feature improved RPCs (iRPC). Distinguished by a unique design and geometry, including a 2D strip readout, these iRPCs represent a significant advancement over the current RPC system. The enhancements include the use of thinner electrodes, a narrower 1.4 mm gas gap and improved FEB allowing a 30 fC threshold. During the winter shutdown of LHC in 2025, two disks with 36 iRPC chambers were installed and commissioned at CMS in record time. The present talk provides a full summary of the iRPC construction, quality control, installation, commissioning and future perspectives.
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