The CAGE Scanner: Developing PSD Techniques for LEGEND-1000
ORAL
Abstract
The LEGEND experiment is searching for 0νββ decay in high-purity germanium detectors enriched in 76Ge. LEGEND-1000, a next-generation ton-scale experiment, targets a sensitivity that would fully cover the inverted mass hierarchy parameter space, reaching discovery sensitivity to half lives exceeding 1028 years. To achieve sufficiently low background for this search, LEGEND combines the passive shielding of the underground laboratory of LNGS, a liquid argon scintillation detector, and powerful HPGe pulse shape discrimination (PSD) techniques. This talk will discuss preliminary results from the Collimated Alphas, Gammas, and Electrons (CAGE) Scanner, a test stand at UW that aims to better understand surface events in germanium detectors, which are a leading background risk, and the development of new pulse shape parameters designed to effectively mitigate this background source.
*This work is supported by the U.S. DOE and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak RDA; the Swiss SNF; the UK STFC; the Russian RFBR; the Canadian NSERC and CFI; the LNGS and SURF facilities.
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Presenters
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Grace Song
- University of Washington