Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Poster
HK 23.44: Poster
Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik
Development of a gas system for the Transition Radiation Detector of the CBM experiment — •Nikolai Podgornov1, James Ritman1,2, Peter Wintz2, and Felix Fidorra3 for the CBM collaboration — 1Ruhr-Universität Bochum — 2Forschungszentrum Jülich — 3Westfälische Wilhelms-Universität Münster
One of the crucial components of the Compressed Baryonic Matter (CBM) experiment is the Transition Radiation Detector (TRD), which is essential for identifying electrons with a momentum above p>1 GeV/c. A high detection efficiency of better than 90% is also required. The TRD uses a mixture of the noble gas xenon and the quenching gas CO2. Since xenon is an expensive gas, a critical part of the TRD is its gas system, which must maintain a stable and optimal gas mixture in a closed circuit. The design of this gas system also involves considerations of gas mixture purity, flow rates, and pressure stability to ensure efficient charged particle and transition radiation detection. To accurately identify electrons amidst a high background of other particles, the gas overpressure in the TRD must be precisely controlled and kept within a range of about 0.2 - 0.6 mbar. This report discusses the gas system requirements, the status of a gas system prototype, and plans for its development into a full-size system, including the design of the gas distribution and circulation system and the implementation of monitoring systems. My contribution to the prototype's development will also be presented. This includes testing stability under various conditions such as power failure, pump failure, and gas leaks, as well as testing the calibration procedure for gas pressure sensors.
Keywords: Compressed Baryonic Matter; Transition Radiation Detector; Gas system