Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Instrumentation VIII

HK 29.4: Talk

Tuesday, March 12, 2024, 18:45–19:00, HBR 19: C 5a

Commissioning of the First Gas System Line for the CBM-TRD — •Fidorra Felix for the CBM collaboration — Institut für Kernphysik, Münster

The Compressed Baryonic Matter (CBM) experiment is a fixed target heavy-ion experiment which is currently under construction at FAIR, GSI Darmstadt. It will explore the QCD phase diagram at high net-baryon densities. The Transition Radiation Detector (TRD) of the CBM experiment is based on Multi Wire Proportional Chambers (MWPCs) filled with Xe/CO2 85:15 as detector gas. This talk reports on the commissioning of the first regulated line of the gas system for the CBM-TRD. During operation, the gas flow through the chambers has to be regulated such that the relative pressure in the detector volume stays within -0/+1 mbar. To ensure the gas quality, also continuous monitoring of O₂, CO₂ and H₂O content will be included. A part of the gas system, as, e.g., the main regulation valves, the circulation pump and the PLC layer will be located in a service level above the experiment. The first gas line, including already the final tube lengths has been set up in the laboratories in Münster for characterisation of, e.g., the timing characteristics of the pressure control and for commissioning. This talk will be about the concept, the construction, the operation status of the gas system and a tightness measurement of the first final TRD MWPC. This work is supported by BMBF grant 05P21PMFC1.