SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 11: Neutrinos, Dark Matter I

T 11.6: Talk

Monday, March 20, 2023, 17:45–18:00, POT/0051

Vibration decoupling in the COSINUS underground facility — •Moritz Kellermann for the COSINUS collaboration — Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München

COSINUS is a direct dark matter detection experiment that will utilize cryogenic calorimeters based on sodium iodide (NaI) to resolve the tension between the positive dark matter signal measured by DAMA/LIBRA and the null-result by other experiments. Currently, a modern cryogenic facility is set up at the Laboratori Nazionali del Gran Sasso (LNGS) and is expected to begin operation within 2023. The facility includes a large clean room area on top of a 270 cubic meter water tank equipped with ~30 Photo Multiplier Tubes (PMTs) acting as an active muon veto. Detectors will be mounted in a custom-made dry dilution refrigerator with a base temperature of 9 mK. A lifting system will lower the refrigerator into a passive copper shielding within the water tank. To reach the thermal stability necessary for operating cryogenic calorimeters in a dry dilution refrigerator, a multi-stage passive vibration-decoupling system is currently being tested. This contribution will present the COSINUS facility and the planned vibration decoupling system.