Speaker
Description
The High-Luminosity LHC (HL-LHC) upgrade will increase the instantaneous luminosity by up to a factor of five beyond the current LHC design, imposing strict requirements on the CMS tracking system. The Phase-II Outer Tracker will employ novel silicon Pixel-Strip (PS) modules capable of performing transverse momentum discrimination for the Level-1 trigger. A key component of the PS module is the Macro-Pixel Sub-Assembly (MaPSA), which integrates a pixelated silicon sensor with dedicated readout ASICs.
A distributed network of CMS institutes worldwide carries out the production and quality assurance of MaPSAs. A common testing framework has been established to ensure uniform electrical characterisation, threshold tuning, and noise evaluation, among other assessments across all production sites. Continuous optimisation of assembly and testing procedures has led to significant improvements in yield and process stability.
This contribution presents an overview of the global MaPSA production effort, including testing methodologies, quality control metrics, yield evolution, and current production status.