Speaker
Description
The High Luminosity LHC (HL-LHC) phase will provide unprecedented opportunities for precision measurements and searches for rare processes, while posing significant challenges due to the high radiation environment and up to 200 simultaneous interactions per bunch crossing. To mitigate the impact of pile-up, the CMS experiment will install the MIP Timing Detector (MTD), providing charged-particle timing with a precision of 30–60 ps. Its central part, the Barrel Timing Layer (BTL), consists of about 166,000 LYSO:Ce crystal bars with double-ended SiPM readout. Following the completion of large-scale production and with detector assembly now largely completed, the BTL project is moving toward final qualification, system integration, and commissioning preparation. This contribution will give an overview of the BTL design and performance, and present the latest status of detector assembly and large-scale system tests.
