SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Instrumentation XII

HK 44.4: Talk

Wednesday, March 22, 2023, 18:30–18:45, SCH/A251

A new concept for the geometry of the Silicon Tracking System in the CBM Experiment — •Mehulkumar Shiroya — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

The Compressed Baryonic Matter experiment is a fixed target experiment planned to be built at the Future Facility of Anti-Proton and Ion Research at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. The Silicon Tracking System is the main detector for tracking and momentum determination of the CBM experiment. It is designed to measure up to 700 charged particles produced in nucleus-nucleus collisions up to an interaction rate of 10 MHz, and achieve a momentum resolution in 1 Tm dipole magnetic field better than 2%. It uses double-sided micro-strips silicon sensors with a thickness of 320 ± 15 µm arranged in 8 tracking stations. Since the CBM magnet cannot be realized as previously planned, the originally intended monolithic design which minimizes the detector dimensions can be replaced by a modular structure independently assembled, called STS-3 & STS-5, and a full separation of services (low/high voltage, front-end, cooling, etc). A ROOT based geometrical model for the new conceptual design of the STS, including a detailed description of the passive material, has been implemented. The performance for track reconstruction and momentum determination has been studied in comparison with the old design with Au+Au simulations at different colliding energies. Further detailed information will be presented during the conference.