Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 22: Postersitzung
HK 22.57: Poster
Montag, 7. März 2005, 16:30–18:00, TU MA141
The ALICE TRD detector control system and readout electronics performance under test beam conditions — •Jorge Mercado — Physikalisches Institut der Universität Heidelberg, Germany
The ALICE experiment incorporates a transition radiation detector (TRD) designed to provide electron identification in the central barrel at momenta in excess of 2 GeV/c as well as fast (6 µs) triggering capability for high transverse momentum (pt ≥ 3 GeV/c) processes. With a total of 540 individual detectors (drift chambers) arranged in 6 radial layers, the TRD implements about 1.2 million analog channels which are digitised during the 2 µs drift time by the front-end electronics (FEE) mounted directly on the back of the detectors.
During late autumn 2004, a 6-layer stack equipped with final chamber prototypes as well as final FEE, was set up at the CERN PS secondary beam and tested up to 10 GeV/c in various orientations (relative to the beam) and momenta. For the first time, the whole FEE was configured and monitored via its devoted detector control system (DCS) under such conditions. Besides this, some features of the final upper communication layers were used successfully; namely, PVSS (Prozessvisualisierungs- und Steuerungs-System) running as DIM (Distributed Information Management) client and being able to provide dedicated commands. An overview of both, the TRD DCS and FEE performance during this beam time is given.