Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 12: Poster Session: Instrumentation and Applications

HK 12.40: Poster

Dienstag, 9. März 2004, 13:30–15:30, Foyer

Radiation tolerance of TRD readout electronics and its DCS — •Marc R. Stockmeier — Physikalisches Institut der Unversität Heidelberg, Philosophenweg 12, Heidelberg

The Transition Radiation Detector (TRD) is one of the main detector components of the ALICE experiment. One purpose is to use the TRD as a trigger on high momentum electrons. In order to guarantee a fast data retrieving the read out electronics are placed directly in the TRD chamber in the active area. The same is true for the Detector Control System (DCS) boards.

During the operation of the experiment the electronic components are irradiated mainly by secondary particles produced by nuclear reactions of the primary reaction products along their flight path. This radiation can damage the used electronics substantially. In order to check the degree of the radiation tolerance of different standard electronic parts several tests where performed at the Oslo Cyclotron Lab. Protons with an energy of 28.5 MeV are used to test the lectronic components of the DCS board and the readout board. Tests where performed with different proton currents starting from 10 pA, applying a total umber of protons above the expected 7· 10⁹ particles per cm² and 10 years of ALICE operation. The results of these test are going to be presented.