Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 110: Experimentelle Techniken der Astroteilchenphysik 3
T 110.1: Gruppenbericht
Dienstag, 5. März 2013, 16:45–17:05, HSZ-101
HEROICA: a test facility for the characterization of BEGe detectors for the Gerda experiment — •Raphael Falkenstein — Eberhard Karls Universität Tübingen, Germany
The Gerda experiment is designed to search for neutrinoless double beta (0νββ) decay of 76Ge. It uses bare, enriched Germanium diodes that are operated in liquid argon. Currently, Phase I is running at Laboratori Nazionali del Gran Sasso in Italy. For Phase II, ∼20 kg of Broad Energy Germanium (BEGe) detectors enriched in 76Ge at 86% level will be additionally deployed. These detectors allow for advanced pulse shape discrimination techniques, to suppress the background, which will be necessary to reach the goal of Phase II with a background index of 10−3 cts/(keV· kg· yr) in the Region of Interest.
The HEROICA project aims for acceptance tests and the characterization of the BEGe detectors. In this talk, the infrastructure of the Belgian HADES underground test facility, as well as the full test protocol for the characterization campaign of the enrBEGe detectors, is described. This test protocol includes the determination of important detector parameters, such as energy resolution, depletion voltage, dead-layer thickness and uniformity, active volume, as well as pulse shape discrimination parameters.
This work was partly supported by the German BMBF.