Performance and Future Upgrades of the CMS Drift Tube Muon Detector

A key component of the CMS (Compact Muon Solenoid) experiment is its muon system. The tracking and triggering of muons in the central part relies on Drift Tube (DT) chambers. The DT system keeps evolving in order to cope with long term operational challenges, as well as future constraints for rate reduction imposed by future increases of LHC luminosity, maintaining the highest possible efficiency. During the first long LHC shutdown (LS1) a significant number of improvements and upgrades started being implemented, in particular concerning the readout and trigger electronics. Ever since LS1, each LHC winter shutdown is used to install and test these new developments towards HL-LHC.Regarding the long term operation of the DT system, in order to cope with up to a factor 2 nominal LHC luminosity, several modifications will be required. The in-chamber local electronics will be modified to cope with the new environment. Also the second level of the readout system needs to be redesigned to minimize event processing time and remove present bottlenecks. This talk will present, along with the main system improvements implemented in the system, the current performance results from our detector, using data collected at 13 TeV center-of-mass energy, confirming the satisfactory operation of both DT. Also the talk will review the present design, status and plans for the future DT system upgrades towards HL-LHC.