Gießen 2007 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Instrumentation und Anwendungen

HK 16.5: Talk

Tuesday, March 13, 2007, 15:15–15:30, B

Commissioning of the first ALICE TRD super module installed at CERN LHC — •David Emschermann for the ALICE TRD collaboration — Physikalisches Institut, Universität Heidelberg, Germany

The Transition Radiation Detector (TRD) is composed of 18 super modules arranged in a barrel geometry in the central part of the ALICE detector. Comprising a total of 540 large-area drift chambers mounted in six layers, it offers almost 1.2 million readout channels on a total area of roughly 750 m². The TRD trigger performs online tracking and electron identification in the challenging heavy ion collisions environment (as well as in pp collisions) within only 6 µ s after the interaction and thus requires excellent position resolution and pion rejection capability.

The first of the 18 TRD super modules was installed in the ALICE central barrel in October 2006. Two more super modules are scheduled for installation in May 2007, the remaining part being completed during 2008. We will highlight the detector performance of the TRD, including momentum dependence of position resolution, angle resolution and electron identification performance as measured during beam tests.

An overview on the commissioning of the detector with cosmic events will be given, focussing on the preparation for first beam in autumn 2007, with the start-up of the LHC.