Speaker
Description
The Compact Muon Solenoid (CMS) detector installed at the CERN Large Hadron Collider (LHC) has an extensive muon system which provides information simultaneously for identification, track reconstruction and triggering of muons. The extreme particle rates and high integrated charge expected during the High Luminosity phase of the LHC (HL-LHC) impose the need to upgrade several parts of the CMS detector, in particular also its muon detection system. The CMS GEM collaboration proposes to extend the high-eta region of the muon system with several different stations of Gas Electron Multiplier (GEM) detectors. GEMs have the ability to provide robust and redundant tracking and triggering functions with an excellent spatial resolution of order 100 micron and a high particle rate capability, with a close to 100% detection efficiency. In this contribution, the present status of the CMS GEM project will be reviewed, and the significant achievements from the start of the R&D in 2009 will be emphasized. The design of the triple-GEM detectors proposed for installation in different stations of the CMS muon system will be described along with the envisaged front-end electronics and data-acquisition system. Results from the detector tests will be reported.
