ICHEP 2022

Calibration of the LEGEND-200 experiment

8 Jul 2022, 19:05

1h 25m

Bologna, Italy

Poster Neutrino Physics Poster Session

Speaker

Yannick Mueller (Physik-Institut, University of Zurich)

Description

LEGEND is the successor of the GERDA and the MAJORANA DEMONSTRATOR experiments searching for neutrinoless double beta decay with high-purity germanium detectors enriched in the isotope ${}^{76}$Ge. Its first phase, currently under commissioning at Laboratori Nazionali del Gran Sasso, will reach a half-life sensitivity of ~10${}^{27}$ yr to this lepton-number violating process by employing 200 kg of Ge crystals. A later phase, with 1000 kg of enriched detectors, will extend the sensitivity to beyond 10${}^{28}$ yr. In this poster presentation, the details of the calibration of the LEGEND-200 experiment are presented. Radioactive ${}^{228}$Th sources will be deployed into the liquid-argon cryostat regularly with a calibration system; positioning the sources next to the detector array with a vertical precision of a few mm. Known $\gamma$-ray energies are used to calibrate the energy scale of the detectors, to measure their energy resolutions, and to monitor the stability of these parameters.

Presentation materials

2022-07-08-Mueller-ICHEP2022-Bologna.pdf