Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 22: Postersitzung

HK 22.56: Poster

Montag, 7. März 2005, 16:30–18:00, TU MA141

Developments in the simulation of the ALICE Transition Radiation Detector from the analysis of beam test data — •Bogdan Vulpescu — Physikalisches Institut der Universität, Heidelberg, Germany

The ALICE detector is described and simulated with a modular software at the level of its sub-detectors, with specific geometry design, signal formation, read-out data structure and tracking algorithm. Each module is plugged to an event reconstructor, collecting the summary information necessary for track recognition and particle identification.

The Transition Radiation Detector (TRD) plays an essential role in the high-level trigger of ALICE. By fast tracking of the high momentum particles and by performing a separation of the rare electrons from the more numerous pions in nucleus-nucleus collisions, the TRD will enhance the signals allowing in-depth studies of quarkonia and jets.

We will present the important feedback of the beam test data analysis on the detector simulations, obtained during runs at the CERN PS secondary beam with small chamber prototypes, as well as first conclusions from a practically final configuration of real size, real electronics stack of 6 TRD chambers. The on-line tracking was trained on data at momenta from 2 to 10 GeV/c, in various orientations of the beam relative to the chamber stack, covering to a large extent the incidence of the 540 single chambers of the TRD.

This work is supported by BMBF.