The upgrade of the Large Hadron Collider (LHC), with an increase of its luminosity up to 5-7 × 10^34cm^−2s^−1, will cause a huge growth of the background rates expected by the experiments. For this reason, the Compact Muon Solenoid (CMS) experiment is going through an upgrade project, which includes the installation of a new station, called GE1/1, consisting of 144 Triple-Gas Electron Multiplier detectors (GEM). The combined operation of the new GE1/1 station together with the existing Cathode Strip Chamber (CSC) station ME1/1 is expected to improve muon tracking and triggering performance. The installation of the GE1/1 station is complete and the commissioning phase is ongoing. We will present the status of this commissioning and the first results on the performance of the detectors and electronics. Plans for LHC Run 3 will also be discussed.
|Collaboration / Activity||CMS|