Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Instrumentation VII
HK 36.1: Group Report
Thursday, March 19, 2026, 13:45–14:15, PHIL B 302
The Silicon Tracking System for the CBM Experiment: Series Production and Detector Performance Evaluation — •Lady Maryann Collazo Sanchez for the CBM collaboration — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
The Compressed Baryonic Matter (CBM) experiment at the Facility for Antiproton and Ion Research (FAIR) investigates strongly interacting matter at high baryon densities. Its core tracking subsystem, the Silicon Tracking System (STS), provides charged–particle tracking and momentum reconstruction at interaction rates up to 10 MHz within a free–streaming data acquisition scheme, reconstructing around 103 charged tracks per nucleus–nucleus collision. The STS consists of eight tracking stations equipped with 876 double-sided silicon microstrip modules mounted on low-mass carbon–fiber ladders to minimize material budget. Prototype STS components were tested in beam experiments within the mini–CBM (mCBM) setup at SIS18 and in the E16 experiment, validating detector performance, free–streaming readout, and online reconstruction.
This report summarizes the current status of the STS project. Series production of modules and ladders is ongoing, and detector construction is in progress. It describes the full sequence of electrical, mechanical, and performance qualification procedures for modules, ladders, and half-unit assemblies. It presents results from comprehensive beam–based performance studies, detector controls, and the final readout chain.
Keywords: silicon; tracking; heavy-ion; assembly; integration