https://doi.org/10.1140/epjc/s10052-020-08781-3
Regular Article – Experimental Physics
Fabrication, characterization and analysis of a prototype high purity germanium detector for 
Ge-based neutrinoless double beta decay experiments
1
Institute of Physics, Jagiellonian University, 30-348, Kraków, Poland
2
Institute of Nuclear Physics Polish Academy of Sciences, 31-342, Kraków, Poland
Received:
23
February
2020
Accepted:
21
December
2020
Published online:
18
January
2021
Experiments searching for the neutrinoless double beta decay in Ge are currently achieving the lowest background level and, in connection with the excellent energy resolution of germanium detectors, they exhibit the best discovery potential for the decay. Expansion to a ton scale of the active target mass is presently considered – in this case on-site production of the detectors may be an option. In this paper we describe the fabrication and characterization procedures of a prototype detector with a small p+ contact, which enhances the abilities of the pulse shape discrimination – one of the most important tools for background reduction. Simulations of the shapes of pulses from the detector were carried out and tuned, taking the advantage of the fact that all the parameters of the Ge crystal, cryostat and of the spectroscopic chain were known. As a result, the pulse shape analyses performed on the simulated and measured data agree very well. The worked out method allows to optimize geometry and crystal parameters in terms of pulse shape analysis efficiency, before the actual production of the detectors.
© The Author(s) 2021
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