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HK: Physik der Hadronen und Kerne
HK 41: Heavy Ions V
HK 41.2: Vortrag
Donnerstag, 14. März 2002, 14:30–14:45, E
The ALICE Transition Radiation Detector — •Johannes P. Wessels — Physikalisches Institut, Universität Heidelberg
In this talk an overview of the ALICE Transition Radiation Detector (TRD) is presented. The ALICE TRD consists of 540 individual detector modules with a total of 1.2 million readout channels. It allows electron identification above a momentum of 1 GeV/c and it will be capable of providing a very fast and efficient trigger for electrons with large transverse momentum pt. The detector will operate in the very high multiplicity environment of heavy-ion collisions at the Large Hadron Collider (LHC), where rapidity densities of charged particles up to dN/dy=8000 are anticipated in collisions of Pb nuclei at √s=5.5 ATeV.
Along with a general overview of the detector, results from extensive in-beam tests with regard to transition radiation yield, pion rejection, and tracking performance will be presented. Using the experimental data the performance of the fast electron trigger has been simulated. Finally, the anticipated performance of the trigger for quarkonia measurements at central rapidity will be demonstrated.