Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 104: Search for Dark Matter 5

T 104.5: Vortrag

Donnerstag, 24. März 2022, 17:20–17:35, T-H36

Development of a Cryogenic Alpha Screening Facility at TUM — •Angelina Kinast¹, Andreas Erb^1,2, Andreas Erhart¹, Fiona Hamilton¹, Margarita Kaznacheeva¹, Alexander Langenkämper¹, Tobias Ortmann¹, Luca Pattavina^1,3, Walter Potzel¹, Johannes Rothe¹, Nicole Schermer¹, Stefan Schönert¹, Raimund Strauss¹, Victoria Wagner¹, and Alexander Wex¹ — ¹Physik-Department E15, Technische Universität München, D-85748 Garching, Germany — ²Walther-Meißner-Institut für Tieftemperaturforschung, D-85748 Garching, Germany — ³INFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi, Italy

A precise measurement of the radio-purity levels of the CaWO₄ crystals used for Dark Matter search with the CRESST experiment and CEvNS measurements with the NUCLEUS experiment is fundamental for a better background understanding. The sensitivity of HPGe detectors is not sufficient to measure the excellent radio-purity levels of the CaWO₄ crystals produced in-house at the Technische Universität München (TUM). I report on a cryogenic alpha-screening facility developed at TUM, which is currently being commissioned, and will provide a method to determine the radiopurity of our CaWO₄ crystals by measuring the alpha-decays with high precision in the unique experimental environment of the shallow underground laboratory (UGL) at TUM. The research was supported by the DFG through the Excellence Cluster ORIGINS, the SFB1258 and the BMBF: 05A17WO4 and 05A17VTA.