Speaker
Description
Semiconductor detectors, owing to their low material budget, precise spatial resolution, and mature fabrication processes, are widely used in the tracking systems of large-scale spectrometers. Compared with conventional strips or hybrid chips, MAPS detectors use highly integrated commercial semiconductor processes, enabling complex front-end electronics while maintaining low cost in large-volume production, and offering theoretically better spatial resolution and a lower material budget. The COFFEE series are MAPS detectors fabricated in commercial 55 nm HVMOS process and developed for LHCb Upgrade II UP; they are designed to stand the high-radiation environment of the HL-LHC and to provide a fast timing resolution of 25 ns. This report will present the current R&D status of COFFEE, focusing on beam readout test results for the COFFEE3 pixel array and future improvements to the high-resistivity process.
