Operations and performance of the CMS RPC muon system at LHC

摘要

The Compact Muon Solenoid (CMS) experiment is one of the two general-purpose detectors at the CERN Large Hadron Collider. CMS combines three different gaseous detector technologies to trigger and reconstruct muons: Drift Tubes in the barrel region (|η| ＜ 1.2), Cathode Strip Chambers in the endcaps (0.9 ＜η ＜ 2.4), and Resistive Plate Chambers (RPCs) in both regions, as a dedicated muon trigger. We report on the operations and performance of the RPC system after 2 years of LHC running with increasing instantaneous luminosity. Special attention is given to the stability of the system and to the working point calibration procedures.