Vorschau

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Abstract

The subject of this thesis is the development of a modern time-offlight detector, a MRPC (Multi-gap Resistive Plate Chamber) for the Compressed Baryonic Matter (CBM) experiment. The main goal of CBM is the investigation of the phase diagram of strongly interacting matter in the region of the highest baryon densities. In order to measure the necessary observables with unprecedented precision an excellent particle identification is required. The key element providing hadron identification in heavy ion reaction at incident energies between 2 and 35 AGeV is a 120 m2 large Time-of-Flight (ToF) wall composed of MRPCs. The ToF-wall is subdivided in a high rate, an intermediate rate and a low rate region. In this thesis we present a full-size demonstrator for the intermediate rate region and for the low rate region. In-beam and cosmic ray tests demonstrated that these fully differential prototypes fulfill the necessary requirements which are a counter time resolution of about 50 ps, an efficiency above 95 %, a rate capability of about 1 kHz/cm2 and a granularity between 25 - 50 cm2. Based on these counters the so-called “outer ToF-wall” was designed in this work.