Dortmund 2021 – wissenschaftliches Programm
T 97.10: Vortrag
Donnerstag, 18. März 2021, 18:15–18:30, Tv
Background Rejection with the Liquid Argon Instrumentation of LEGEND-200 — •Patrick Krause1, Maria Fomina2, Konstantin Gusev2, Jozsef Janiscko-Csathy1,3, Stefan Schönert1, Mario Schwarz1, Egor Shevchik2, and Christoph Wiesinger1 — 1Physik-Department, Technische Universität München, Garching — 2Joint Institute for Nuclear Research, Dubna, Russia — 3now at Semilab Semiconductor Physics Laboratory Co. Ltd., Budapest, Hungary
The LEGEND Collaboration aims to develop a phased, 76Ge-based double-beta decay experimental program with discovery potential at a half-life beyond 1028 years. The first Phase, LEGEND-200, targets a discovery potential of 1027 years by aiming at a background index of 2 · 10−4 cts/(keV·kg·yr). Based on the success in GERDA a liquid argon (LAr) detector system will be deployed. It will offer secondary event information which will allow the identification of background events. The system utilizes the property of LAr to scintillate upon the interaction with ionizing radiation. The emitted vacuum ultraviolet light is shifted to the optical spectrum and read out by silicon photomultipliers mounted at the end of optical fibers. The design of the LEGEND-200 LAr instrumentation will be presented and discussed with special emphasis on what was learned from the GERDA LAr instrumentation. This work has been supported in part by the BMBF Verbundforschung (05A20WO2).