Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 43: Halbleiter: Belle, Germanium, Diamant

T 43.8: Talk

Tuesday, March 10, 2015, 18:30–18:45, G.10.05 (HS 7)

Optimization of the geometry of broad energy germanium detectors — •Marco Salathe — Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Broad energy germanium (BEGe) detectors are employed in many different scientific experiments and widely used in industrial applications. A circular contact is implanted on a base of the cylindrical shaped detector. This circular contact is used as a read out electrode and is surrounded by a passivated groove that separates it from the high voltage electrode, which spans over the remaining surface. The size of the read out electrode and the groove geometry are assumed to have a major impact onto the energy resolution, pulse shape discrimination and energy threshold.

To quantify the impact of the detectors geometry on its performance, the read out contacts size of two BEGe detectors was modified several times. The geometry of the detector was optimized prior to each reprocessing step through the use of simulations. For each configuration, the detectors performance was analysed through distinct measurements.

Some general consideration about analysis tools, simulation libraries and first results of this study will be presented in this talk.