Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Instrumentation und Anwendungen II

HK 19.2: Talk

Tuesday, March 11, 2008, 08:45–09:00, 2D

A low-voltage dcs-board power-control-system for the ALICE TRD — •Michael Neher for the ALICE-TRD collaboration — Physikalisches Institut, Heidelberg

The Transition Radiation Detector for ALICE consists of 540 drift chambers arranged in 18 supermodules. The readout electronics of each chamber is controlled by a detector control system (dcs) board. A power distribution box provides dcs-power to all 30 chambers in a supermodule, whereby 4 doubly redundant power control units independently switch power for each of the 18 distribution boxes.

Control and monitoring of the hardware is fully implemented as a detector oriented hierarchy of objects behaving as finite state machines. PVSS II is used in the supervisory layer. Communication to the hardware is realized by a distribution information management server.

We report on the completed production of 18 power distribution boxes for the full TRD and focus on its finalized control system. Applications at the supermodule construction site at University of Munster, a recent test beam at the CERN Proton Synchrotron and during a data run with cosmic events with the ALICE detector are presented.