Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Instrumentation XI

HK 41.1: Group Report

Wednesday, March 13, 2024, 15:45–16:15, HBR 19: C 5a

With mCBM towards the CBM experiment at FAIR — •Christian Sturm for the CBM collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH

The Compressed Baryonic Matter experiment (CBM) at FAIR is designed to measure nucleus-nucleus collisions at unprecedented interaction rates of up to 10 MHz which will allow study of extremely rare probes with high precision. To achieve this high rate capability, CBM will be equipped with fast and radiation-tolerant detector systems, readout by a free-streaming data acquisition system, transporting data with a bandwidth of up to 1 TB/s to a large scale computer farm for event reconstruction and first level event selection. The mCBM experiment, a CBM demonstrator and full-system test-setup was constructed 2017/18 at the SIS18 facility of GSI/FAIR, taking data within the FAIR Phase-0 program since 2019, to commission and optimize the complete CBM data chain under realistic experiment conditions. mCBM comprises prototypes and pre-series productions of all CBM detector systems with their read-out electronics, transporting synchronized data streams into the Green IT Cube of GSI/FAIR. To further validate CBM’s read-out and data processing concept, the production yield of rare Λ baryons is studied in nucleus-nucleus collisions serving as a benchmark observable, which will allow comparison with published data. Hence, latest results on Λ reconstruction as well as performance studies of the detector systems will be presented. Furthermore, detector upgrades and a first online system prototype for the upcoming 2024 beam campaign will be introduced.

Keywords: FAIR; CBM; nucleus-nucleus collisions; free-streaming DAQ / data transport; reconstruction of Lambda baryons