The CMS Muon detectors

The compact muon solenoid (CMS) is a multipurpose detector at the large hadron collider (LHC) at CERN. One of the main goals of the CMS design is to ensure efficient and accurate identification and reconstruction of muons. The CMS muon spectrometer is based on three kinds of gaseous detectors placed inside the iron return yoke of a 4 Tesla superconducting solenoid: Drift Tube Chambers (DT), Cathode Strip Chambers (CSC) and the Resistive Plate Chambers (RPC). The detector is currently being assembled and commissioned with cosmics to be ready to take data in 2008. At the end of 2006 a fraction of the whole CMS including several sectors of the muon system were tested together with the magnet at the nominal field. A description of the main features of the system, with more emphasis on the DT detectors will be presented.