Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Schwerionenkollisionen und QCD Phasen III

HK 23.7: Vortrag

Dienstag, 16. März 2010, 18:15–18:30, HG I

Construction and Calibration Status of the ALICE TRD — •Henriette Gatz, Björn Albrecht, and Matthias Walter — Westfälische Willhelms-Universität Münster

The Transition Radiation Detector (TRD) is part of the ALICE experiment at CERN, designed for particle identification, tracking and triggering. In the current LHC run, 7 of the 18 super-modules that comprise the TRD are installed. The remaining 11 are being assembled and tested at the University of Münster. As part of the quality assurance, several million cosmic events are recorded. Based on these data a first determination of calibration parameters is possible: e.g. the detector gain can be determined with a granularity of 4 pads, the misalignment of the TRD chambers with respect to the ideal position can be calculated and provided for the offline reconstruction. To evaluate the TRD trigger performance the position and angular resolution as well as the efficiency of the tracklet reconstruction implemented in the front end electronics are studied with these cosmic data as well as with Monte Carlo simulations.

*Supported by BMBF and EMMI.