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HK: Fachverband Hadronen und Kerne
HK 41: Accelerators and Instrumentation II
HK 41.1: Gruppenbericht
Dienstag, 17. März 2009, 16:30–17:00, H-ZO 90
The Transition Radiation Detector for ALICE at LHC — •Thomas Dietel — IKP Münster
The Transition Radiation Detector (TRD) for the ALICE experiment at the Large Hadron Collider (LHC) identifies electrons and performs online tracking in the challenging high multiplicity environment of heavy-ion collisions. A trigger decision based on the excellent position resolution and pion rejection capability can be provided within 6.5 microseconds after the interaction.
The TRD consists of 540 Xe gas-filled pad readout drift chambers with radiators, arranged in 18 super-modules in barrel geometry in the central part of the ALICE detector. The large active area of roughly 700 m2 is covered by almost 1.2 million readout channels.
For a period of six months, four installed super-modules of the detector were commissioned with cosmic radiation. A trigger on cosmics generated by the TRD at level 1 was implemented and successfully operated in conjunction with the other subdetectors of the central barrel. We will report on the performance and current understanding of the detector based on these data.