SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 62: Astroparticle Physics I
HK 62.3: Vortrag
Donnerstag, 23. März 2023, 14:45–15:00, SCH/A252
Towards the biggest germanium detectors ever grown — •Tommaso Comellato and Stefan Schönert — Technical University of Munich, Garching bei München, Germany
The Legend experiment searches for the neutrinoless double-beta decay of 76Ge, a second order weak process which, if observed, would provide evidence of beyond the standard model physics. It is presently being commissioned in the upgraded Gerda infrastructure at LNGS (Italy) and in its first stage it will operate 200 kg of High Purity Germanium (HPGe) detectors. The baseline detector geometry is the inverted coaxial, which combines the excellent pulse shape discrimination performance of previous generation experiments with a up to a factor 4 larger mass per detector. This yields as a result a reduction of a similar factor of backgrounds from close-by parts as cables and holders. In this talk, detailed field modeling of big detectors will be given, and preliminary results on the experimental characterization of one of them will be presented. This work has been supported in part by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No. 786430 - GemX)