Signal Readout Electronics for LEGEND-200

Abstract

LEGEND (Large Enriched Germanium Experiment for Neutrinoless Double-Beta Decay) is a ton-scale experimental program to search for neutrinoless double beta ($0 \nu \beta \beta$) decay using high-purity germanium detectors enriched in the isotope $^{76}$Ge. An observation of $0 \nu \beta \beta$ decay would unequivocally prove the existence of lepton number violation and provide insight into the nature of neutrino masses. On-site construction for the first 200-kg phase (LEGEND-200) of the experiment will start at the Gran Sasso underground laboratory (Laboratory Nazionali del Gran Sasso, Italy) in mid-2020. In order to achieve a sensitivity of $10^{27}$ years on the $0 \nu \beta \beta$ half-life, ultra-clean low-noise signal readout electronics are essential as they impact both the background budget of the experiment and the efficiency of background rejection. In this contribution, the current status of the signal readout electronics for LEGEND-200 is presented.