Speaker
Description
The aging process is one of the main concerns when operating Resistive Plate Chambers (RPCs) in high-luminosity, long-term detector experiments such as the Compact Muon Solenoid (CMS). Since 2010, the CMS experiment has collected about 500 fb⁻¹ of pp collision data, while the expectation for the HL-LHC is to collect more than 3000 fb⁻¹. To ensure reliable operation throughout this period, the CMS-RPC system has undergone an extensive longevity campaign at the Gamma Irradiation Facility (GIF++). The irradiation campaign has delivered an integrated charge equivalent to the full HL-LHC expectation for the RE2 chambers and 63% of the expected value for the RE4 chambers, with a safety factor of three included in the estimate. RPCs are known for their excellent timing resolution, which is an important component of the CMS muon trigger system. This work investigates the evolution of the RPC timing resolution throughout the longevity campaign for the RE2 and RE4 chambers.