Characterization of 30 ${}^{76}$Ge enriched Broad Energy Ge detectors for GERDA Phase II

Abstract

The GERmanium Detector Array (GERDA) is a low background experiment located at the Laboratori Nazionali del Gran Sasso in Italy, which searches for neutrinoless double beta decay of ${}^{76}$Ge into ${}^{76}$Se+2e${}^{-}$. GERDA has been conceived in two phases. Phase II, which started in December 2015, features several novelties including 30 new Ge detectors. These were manufactured according to the Broad Energy Germanium (BEGe) detector design that has a better background discrimination capability and energy resolution compared to formerly widely-used types. Prior to their installation, the new BEGe detectors were mounted in vacuum cryostats and characterized in detail in the HADES underground laboratory in Belgium. This paper describes the properties and the overall performance of these detectors during operation in vacuum. The characterization campaign provided not only direct input for GERDA Phase II data collection and analyses, but also allowed to study detector phenomena, detector correlations as well as to test the strength of pulse shape simulation codes.

arXiv comment29 pages, 18 figures

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Cited by in corpus (9)

• Final Results of GERDA on the Search for Neutrinoless Double-$\beta$ Decay
• Final Results of GERDA on the Two-Neutrino Double-$\beta$ Decay Half-Life of ${}^{76}$Ge
• Pulse shape analysis in GERDA Phase II
• Neutrinoless Double Beta Decay with Germanium Detectors: 10${}^{26}$ yr and Beyond
• A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat
• Searching for ${}^{76}$Ge neutrinoless double beta decay with the CDEX-1B experiment
• Search for tri-nucleon decays of ${}^{76}$Ge in GERDA
• Investigation of ASIC-based signal readout electronics for LEGEND-1000
• Calibration of the GERDA experiment