Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 45: Instrumentation and Applications VI

HK 45.9: Vortrag

Donnerstag, 11. März 2004, 18:45–19:00, C

Test Results of First ALICE TRD Series Production Chambers — •David Emschermann — Physikalisches Institut, Universität Heidelberg, Germany

The ALICE Transition Radiation Detector (TRD) consists of 540 individual detector chambers covering a total area of roughly 750 m². They are arranged in a six layer barrel geometry in the central part of the ALICE detector. The TRD chambers are built in 12 different dimensions ranging from 97 x 108 x 12.5 cm³ to 120 x 145 x 12.5 cm³, housing either 1728 or 2304 individual channels. The readout electronics will be mounted directly on the backside of the chamber allowing for real time data processing. The series production of TRD chambers has started end of 2003 and will run in 4 production sites for about two years.

First measurements of mass production chambers equipped with final electronics will be presented. They include mechanical tolerances, gas tightness, dark currents at operating voltage and voltage stability, gas gain and its uniformity over the detector surface. These data form part of the ALICE detector construction database.