SMuK 2021 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Instrumentation VII

HK 23.1: Group Report

Thursday, September 2, 2021, 16:30–17:00, H2

Status of the CBM Time-of-Flight project — •Ingo Deppner and Norbert Herrmann for the CBM collaboration — Physikalisches Institut, Uni. Heidelberg

In order to provide an excellent particle identification (PID) of charged hadrons at the future high-rate Compressed Baryonic Matter (CBM) experiment the CBM-TOF group has developed a concept of a large-area Time-of-Flight (ToF) wall equipped with multi-gap resistive plate chambers (MRPC). The MRPC detectors reached by now the close to final design and were extensively tested in several beam campaigns at particle fluxes of up to a 25 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 is being used for physics research at two scientific pillars of the FAIR Phase-0 program. At STAR, the fixed- target program of the Beam Energy Scan II (BES-II) relies on 108 CBM MRPC detectors for forward PID at interaction rates of up to 2.5 kHz with 3 to 31.2 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 perspectives, these FAIR Phase-0 involvements allow for high rate detector tests and long term stability tests and will help gathering experience in operating the final CBM TOF wall. The current status of the CBM-TOF project and latest achievements from our Phase-0 involvements will be presented. The project is partially funded by BMBF contract 05P15VHFC1.