Low Radioactivity Techniques (LRT2022)

Detector characterization for the LEGEND-200 experiment

Jun 15, 2022, 3:11 PM

1m

Surbeck Ballroom (South Dakota Mines)

Poster Experiment Backgrounds, Models, Simulations LRT 2022 - poster session

Speaker

Valentina Biancacci (Università degli Studi di Padova & INFN Padova)

Description

The LEGEND collaboration is developing an experimental search for the neutrinoless double-beta ($0\nu \beta \beta$) decay of the isotope ${}^{76}$Ge. The first stage, LEGEND-200, is based on 200kg of ${}^{76}$Ge-enriched high-purity germanium detectors immersed in liquid argon. It is currently under construction at the Laboratori Nazionali del Gran Sasso in Italy.
Among others, novel inverted coaxial point-contact detectors provide the information to effectively discriminate against background events. Such background discrimination requires a precise understanding of the behavior of the germanium detectors, necessitating extensive detector characterization. The acceptance tests aim to verify the performance of the delivered detectors meets specifications and to determine their optimal operational parameters. Furthermore, one of the most important issues is the determination of the active volume of the detectors. It can be attained by studying the detector response when irradiated by radioactive sources.
The first results of the characterization program with an emphasis on active volumes are presented.

Presentation materials

2022-06-15-Biancacci-LRT2022.pdf