Quality assurance test of the STS-XYTERv2 ASIC for the silicon tracking system of the CBM experiment

Abstract

The Compressed Baryonic Matter (CBM) Experiment will be one of the major scientific endeavors of the future Facility of Antiproton and Ion Research (FAIR) in Darmstadt. Nuclear collisions at an interaction rate of up to 10 MHz will provide the data for numerous observables, including rare probes with necessary statistical significance. Key to achieve this goal is a fast and radiation hard detector subsystem for particle tracking. In the CBM experiment, the Silicon Tracking System (STS) is the main system for particle tracking. Signal read-out from the 2x1024 channel sensors is based on the self-triggering STS-XYTERv2 ASIC specifically developed for this application. Towards final STS-operation, a down-scaled mini-CBM (mCBM) setup was taken into operation at the SIS18 accelerator at GSI. In this paper, the test measurements of the STS-XYTERv2 asıcs and operational tests performed for quality assurance during the assembly of the mSTS detector modules will be presented and discussed in detail. These measurement procedures will constitute fundamental processes for quality assurance (QA) in the assembly of the roughly 900 STS detector modules.