Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Instrumentation XIV

HK 58.2: Talk

Thursday, March 31, 2022, 14:15–14:30, HK-H3

The powering scheme of the CBM Silicon Tracking System — •Anton Lymanets¹, Oleksandr Kshyvanskyi², and Maksym Teklishyn^1,2 for the CBM collaboration — ¹GSI Helmholtzzentrum für Schwerionenforschung GmbH — ²Kiev Institute for Nuclear Research, Ukraine

The Silicon Tracking System (STS) is the principal tracking detector of the future CBM experiment at FAIR. It will perform charged-particle track measurement with momentum resolution better than 2% in a 1 Tm dipole-magnetic field. A main challenge for the STS is to maintain high track reconstruction efficiency throughout the projected lifetime of the experiment which means being exposed to an accumulated fluence of up to 10¹⁴ n_eq/cm², expected to be reached in beam-target interaction rates of 10 MHz. Therefore, front-end electronics with self-triggering architecture needs to have sufficient signal-to-noise ratio (S/N>10) which requires an ultra-low noise system design.

The STS will consist of eight tracking stations comprising 876 double-sided silicon detector modules with a total of 1.8 million readout channels. Operation of the system requires a detailed understanding of the electrical scheme at different hierarchical levels, including: low and high voltage systems, copper data lines from the front-end electronics to the read-out and data combiner boards, signal path, as well as grounding and shielding concepts. The performance parameter of the system is equivalent noise charge (ENC) value measured by the front-end electronics. The electrical scheme of the system as well as its experimental validation in the laboratory and beam will be presented.