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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Instrumentation XII

HK 53.1: Gruppenbericht

Donnerstag, 21. März 2019, 14:00–14:30, HS 12

Status of the CBM Time-of-Flight system — •Ingo Deppner and Norbert Herrmann — Physikalisches Institut, Uni Heidelberg

To provide particle identification (PID) of charged hadrons at the future high-rate Compressed Baryonic Matter (CBM) experiment the collaboration has developed a large-area Time-of-Flight (ToF) wall equipped with multi-gap resistive plate chambers (MRPC). The MRPC detectors were designed and tested in beam to maintain an efficiency of at least 95varying particle fluxes of up to a few kHz/cm². Prior to its destined operation at the Facility for Antiproton and Ion Research (FAIR) - starting in 2025 - this high-rate timing MRPC technology will be used for physics research at two scientific pillars of the FAIR Phase-0 program: the end-cap TOF upgrade of the STAR experiment at RHIC and the mTOF wall of the mCBM experiment at SIS18. At STAR, the fixed- target program of the Beam Energy Scan II (BES-II) will rely on 108 CBM MRPC detectors for forward PID at interaction rates of up to 2 kHz with 2.9 to 30.3 AGeV Au beams. At mCBM, high-performance benchmark runs of Λ production at top SIS18 energies (1.5/1.9 AGeV for Au/Ni beams) and CBM design interaction rates of 10 MHz will become feasible with a PID backbone consisting of 25 CBM MRPC detectors. Apart from the physics perspective, these pre-FAIR involvements will help gathering experience in operating the final CBM TOF wall with about 1500 MRPC detectors and 110,000 readout channels. The project is partially funded by BMBF 05P15VHFC1.