München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Instrumentation IX

HK 44.1: Group Report

Wednesday, March 20, 2019, 16:30–17:00, HS 11

The Silicon Tracking System of the CBM Experiment at FAIR — •Ievgeniia Momot for the CBM collaboration — Goethe-Universität, Frankfurt — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — KINR, Kyiv, Ukraine

The Compressed Baryonic Matter (CBM) experiment at FAIR is designed to study dense nuclear matter in the laboratory with help of heavy nuclei up to kinetic energies of 11 AGeV.

One of the detector systems in this experiment is the Silicon Tracking System (STS). Its task is to measure the trajectories of up to 800 charged particles per nuclear collision at interaction rates up to 10 MHz. In order to guarantee the required performance over the full lifetime of the experiment, the detector system has to have a low material budget, a high granularity, a high signal-to-noise (SNR) ratio, and a high radiation tolerance. As a result of optimisation studies, the STS consists of double-sided silicon microstrip sensors, which have to provide readout with SNR>10, even after irradiation with the expected lifetime fluence of 10¹⁴ n/cm² 1 MeV equivalent.

The STS will be located in the gap of a superconducting dipole magnet comprising 8 tracking stations, which consist of 896 modules mounted on 106 ladders. The readout features self-triggering front-end electronics that streams data to a computing farm for online analysis.

Recent progress with detector design, component development towards start of series production, and the mSTS detector demonstrator during the mCBM campaign at GSI’s SIS18 accelerator will be covered in this talk.