Ongoing upgrades on the road to HiLumi Upgrading the CMS muon chamber electronics Work on the CMS muon system upgrade is now underway, with teams starting to install the new electronic system for the Drift Tube (DT) chambers. By 2028, all the 250 muon chambers in the CMS barrel will be equipped with the new mini crates housing the electronic boards to read out and control the DT chambers These boards digitise signals from muons passing through the DT with nanosecond-level precision and transmit the information via high-speed optical links to the backend electronics. The new architecture will contribute to improve the performance of the CMS trigger system for the High-Luminosity LHC era, whic...