Köln 2004 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 12: Poster Session: Instrumentation and Applications
HK 12.42: Poster
Tuesday, March 9, 2004, 13:30–15:30, Foyer
Detector Control System for the ALICE Time Projection Chamber — •Ulrich Frankenfeld1, G. Augustinski1, P. Braun-Munzinger1, H.W. Daues1, C. Garabatos1, P. Glässel2, J. Hehner1, R. Renfordt3, H. Sann1, H.R. Schmidt1, H. Stelzer1, D. Vranic 1, and B. Windelband 2 — 1Gesellschaft für Schwerionenforschung , Darmstadt — 2Universität Heidelberg — 3Institut für Kernphysik, Universität Frankfurt
The Time Projection Chamber (TPC) is the main tracking detector of the ALICE Experiment at the CERN Large Hadron Collider (LHC). The Detector Control System (DCS) of the TPC controls the subsystems: high voltage (108 channels), low voltage (72 channels), gas system, cooling system (40 circuits), laser system, front-end electronic (216 read-out boards) and the drift voltage of the field cage. Its functionality includes: switching the subsystems on/off , monitoring and logging of relevant detector parameters, stabilizing of the temperature in the sensitive volume of the detector and reporting and logging of alarm conditions. The TPC Control is part of the hierarchical Control System of Alice. During normal operation the shift crew controls the detector at the highest level (Experiment Control System). No specialized knowledge about the sub-detectors is required. This implies that the DCS has to have the appropriate functionality built in, for example setting the voltages in the right order. A Finite State functionality has been implemented into the DCS of the TPC. The architecture and test results of a prototype Control System of the TPC will be presented.