Speaker
Description
In view of the High-Luminosity upgrade of the Large Hadron Collider, the silicon tracker of the Compact Muon Solenoid detector will be fully replaced within the Phase-2 upgrade to cope with luminosities increased by about an order of magnitude compared to LHC design luminosity, and up to 200 simultaneous interactions per bunch crossing. In addition, the new tracker will provide tracking information to the Level-1 trigger, allowing early selection of interesting events and reducing the data rate from 40 MHz to about 750 kHz. The upgraded Outer Tracker will consist of more than 13,000 silicon modules with fine spatial granularity, assembled in several centers worldwide. Module production has been ongoing for over a year, marking the transition from prototyping to large-scale production. During this period, a range of challenges has been encountered, including issues related to component choices, production processes, and external constraints. Some have already been successfully addressed, while others are being actively worked on by dedicated task forces. This talk will present practical lessons learned from large-scale production, including how challenges were handled and how processes were adapted.