Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1995-07-24
Physics
High Energy Physics
High Energy Physics - Experiment
17 pages, latex, 21 figures, eps-format, appended
Scientific paper
The silicon detectors used in the H1-PLUG calorimeter have shown increasing aging effects during the '94 run period of the electron proton storage ring HERA. These effects were particularly manifest as degradation of the signal to noise level and the calibration stability. The reasons for this behaviour have been found to be correlated with radiation damage to the silicon oxide passivation edges of the detectors in strong and fluctuating increases of the leakage currents and in severe changes of the flat band voltages. Depletion voltages however are found to be stable and therefore bulk damage of the silicon can be excluded. A comparison with measurements made by thermoluminescence dosimeters as well as related laboratory experiments suggest that the aging is due to very low energetic electrons and photons.
Hildesheim W.
Seidel Martin
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