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T: Fachverband Teilchenphysik

T 15: Neutrinos, Dark Matter III

T 15.5: Vortrag

Montag, 20. März 2023, 17:30–17:45, POT/0006

Commissioning of the Liquid Argon Instrumentation of LEGEND-200 — •Rosanna Deckert, Patrick Krause, Laszlo Papp, Luigi Pertoldi, and Stefan Schönert — Technische Universität München

LEGEND (Large Enriched Germanium Experiment for Neutrinoless β β Decay) is a ton-scale experiment to search for neutrinoless double beta (0 ν β β) decay using high-purity germanium detectors enriched in ⁷⁶Ge. An observation of 0νββ decay would prove the existence of lepton number violation and provide insight into the nature of neutrino masses. The first phase of the experiment LEGEND-200 will deploy 200 kg of enriched material and aims for a sensitivity of 10²⁷ years on the 0 ν β β decay half-life. To achieve this, the germanium detectors are operated in liquid argon instrumented as an active detector to detect the scintillation light produced by backgrounds from trace radioactive contaminants. Commissioning of the liquid argon instrumentation, consisting of wavelength-shifting fibers, a wavelength-shifting reflector and silicon photomultipliers, took place during 2022 at the Laboratori Nazionali del Gran Sasso. In this talk, some of the main outcomes of the commissioning are presented.

This research is supported by the BMBF through the Verbundforschung 05A20WO2 and by the DFG through the Excellence Cluster ORIGINS and the SFB1258.