Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 41: Accelerators and Instrumentation II
HK 41.3: Vortrag
Dienstag, 17. März 2009, 17:15–17:30, H-ZO 90
Development of a transition radiation detector for a high counting rate environment — •Mariana Petris — NIPNE, 407 Atomistilor St.P.O.B.MG-6, Bucharest - Magurele, Romania
The development of a Transition Radiation Detector (TRD) for a high counting rate environment, required by the next generation of experiments in hadron physics, as CBM experiment at the future facility FAIR, GSI-Darmstadt is a major technical challenge. The expected particle rates for CBM-TRD subdetector used for identification of high energy electrons and tracking of all charged particles, in particular at small polar angles, are up to 105 particles·cm−2·s−1 for 107 interactions·s−1 of minimum bias Au+Au collisions at 25 A*GeV.
A first TRD prototype with high granularity for a high counting rate environment was designed, built and successfully tested. In order to increase the conversion efficiency of the transition radiation in a single TRD layer a second prototype with a new configuration was built and tested. Results of the in-beam investigations of the rate capability and electrons - pions rejection factor as a function of number of layers are presented. The performance of this new type of TRD recommends this architecture of TRD as a solution for high counting rate environments and high pion efficiency TRD with reduced number of channels and material budget, at a given granularity.
Based on these results, for small polar angles region, a real size prototype is proposed.