Speaker
Description
The CMS experiment is upgrading the muon system for High-Luminosity LHC (HL-LHC). Improved Resistive Plate Chambers (iRPCs) will be installed in the endcap stations RE3 and RE4. Compared to conventional RPCs, iRPC has better timing performance because it uses dual TDC channels with bunch-crossing, sub-bunch-crossing, and fine-time information, giving much finer time resolution than the 25 ns bins of the current RPC system. This study presents a first check of iRPC reconstruction using CMS simulation. iRPC signals are clustered and used to build reconstructed hits with local position and time. To study the reconstruction quality, each hit is compared with the simulated ones that produced the fired strips in the same cluster. The performance is studied using local x and y residuals, cluster size, bunch crossing, the number of simulated tracks contributing to each reconstructed hit and basic time-related variables. These results give information about spatial resolution, noise contribution and the possible use of improved iRPC timing. This work is one of the first studies of iRPC reconstruction hits in CMS and can be useful for monitoring iRPC performance before HL-LHC data-taking.