Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 78: Experimental Techniques in Astroparticle Physics 3
T 78.6: Talk
Wednesday, March 23, 2022, 17:30–17:45, T-H37
Development of an Organic Plastic Scintillator based Muon Veto Operating at Sub-Kelvin Temperatures for the NUCLEUS Experiment — •Andreas Erhart1,2, Victoria Wagner1, Ludwig Klinkenberg1, Thierry Lasserre2, David Lhuillier2, Claudia Nones2, Tobias Ortmann1, Luca Pattavina1, Rudolph Rogly2, Johannes Rothe1, Vladimir Savu2, Nicole Schermer1, Raimund Strauss1, and Matthieu Vivier2 — 1Physik-Department, Technische Universität München, D-85748 Garching — 2IRFU, CEA, Université Paris Saclay, F-91191 Gif-sur-Yvette
The NUCLEUS experiment aims to measure coherent elastic neutrino nucleus scattering of reactor anti-neutrinos using cryogenic calorime- ters. Operating at an overburden of 3m.w.e., muon-induced back- grounds are expected to be dominant. It is therefore essential to de- velop an efficient muon veto, with a detection efficiency of more than 99%. A novel concept has been investigated, featuring a plastic scin- tillator based muon veto operating inside the NUCLEUS cryostat at sub-Kelvin temperatures. The required investigation of the detector's low temperature behavior led to the first reported measurements of organic plastic scintillators at sub-Kelvin temperatures. The function- ality of the principal scintillation process has thereby been confirmed. A disc-shape muon veto equipped with wavelength shifting fibers and a silicon photomultiplier has been developed. The research was sup- ported by the DFG through the Excellence Cluster ORIGINS and the SFB1258, and the ERC Starting Grant 2018 "NU-CLEUS".