Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Instrumentation XIII

HK 62.5: Vortrag

Freitag, 31. März 2017, 15:00–15:15, F 102

Construction of large full-size MWPC prototypes for the CBM-TRD — •Susanne Gläessel and Florian Roether for the CBM collaboration — Institut für Kernphysik

The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) will be dedicated to the exploration of the QCD phase-diagram in the region of high net-baryon densities. The Transition-Radiation Detector (TRD) has to provide efficient electron pion separation at high momenta and contribute to the identification of charged hadrons, in particular fragments, at high event rates of up to 10 MHz. Each layer of the TRD is composed of several Multi-Wire Proportional Chambers (MWPC).

The key challenge for the MWPC detector design is to deliver a fast detector response, i.e. short signal collection times, without significantly compromising on the TR-absorption capabilities. The best performance is achieved by adding a small drift region of only 5 mm thickness to the xenon gas volume.

For the first time, four large full-size prototypes for the outer detector area with dimensions of 95×95×4.95 cm3 have been built in a combined effort in Frankfurt and Münster and allow for an advanced evaluation of the detector performance including its tracking capabilities. The chamber construction and the implementation of the specific requirements of the experiment into the detector design and its mounting structure will be presented and discussed.

Supported by the German BMBF-grant 05P15RFFC1.

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