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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster

HK 52.38: Poster

Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer

Monitoring the CBM-TRD Performance with a ⁵⁵Fe-Source — •Dennis Spicker for the CBM collaboration — Institut für Kernphysik, Goethe Uni Frankfurt

The Compressed Baryonic Matter (CBM) experiment at FAIR is designed to investigate the properties of strongly interacting matter at highest net-baryon densities. The Transition Radiation Detectors (TRD) main purpose is the identification of dielectrons in the low and intermediate mass region (up to m(J/Ψ) ). Another important contribution of the CBM-TRD is the measurement of the specific energy loss, in order to differentiate between nuclear fragments with the same m/Z -ratio but different Z.

In September 2017, test measurements were performed at DESY with four TRD chambers, equipped with full-size foam radiators, in an electron beam with 1 to 4 GeV momentum. The main goals of the test campaign were a performance test of the radiators, to measure spatial resolution, a test of the readout electronics and a calibration of the gas-gain for the new Xe/CO₂ mixture. For the latter, a ⁵⁵Fe source was placed in front of one detector.

For this contribution, analyses of ⁵⁵Fe spectra were performed, in order to determine the performance and energy resolution of the latest TRD chamber design.

Supported by the German BMBF-grant 05P15RFFC1