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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Instrumentation 4

HK 12.1: Gruppenbericht

Montag, 23. März 2015, 17:00–17:30, M/HS1

The Silicon Tracking System of the CBM Experiment at FAIR — •Minni Singla for the CBM collaboration — GSI Darmstadt, Germany

The Compressed Baryonic Matter (CBM) experiment, one of the major scientific pillars at FAIR, will explore the phase diagram of strongly interacting matter at the highest net-baryon densities in nucleus-nucleus collisions with interaction rates up to 10 MHz. The Silicon Tracking System is the central detector system of the CBM experiment. Its task is to perform track reconstruction and momentum determination for all charged particles created in beam-target collisions at SIS 100 and SIS 300 beam energies. The technical challenges to meet are a high granularity matching the high track densities, a fast self-triggering read-out coping with high interaction rates, and a low mass to yield high momentum resolution of Δp/p = 1%. The detector system acceptance covers polar angles between 2.5 and 25 degrees and will be operated in the 1 T field of a super conducting dipole magnet. We introduce the concept of the STS, being comprised of eight tracking stations employing ∼1300 double-sided silicon microstrip sensors on modular structures that keep the read-out electronics outside the physics aperture. Ultra-thin-multiline micro-cables will be used to bridge the distance between the microstrip sensors and the readout electronics. Infrastructure such as power lines and cooling plates will be placed at the periphery of the stations. The status of the STS development is summarized in the presentation, including an overview on sensors, read-out electronics, prototypes, and system integration.