Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 62: Search for Dark Matter III

T 62.9: Vortrag

Mittwoch, 2. April 2025, 18:15–18:30, VG 4.102

Pulse Shape Studies on the COSINUS prototypes with BAT — •Sarah Braun for the COSINUS collaboration — MPP Munich

The Cryogenic Observatory for SIgnatures seen in Next generation Underground Searches (COSINUS) experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS), Italy, will provide a model-independent cross-check of the DAMA/LIBRA experiment's findings of modulation signals consistent with the expected dark matter signal. It utilizes ultrapure NaI crystals operated at cryogenic temperatures, enabling a dual-channel readout of scintillation and phonon signals to discriminate different particle interactions.

This contribution focuses on fitting different pulse shape models to the COSINUS detector prototypes, using the Bayesian Analysis Toolkit (BAT) in Julia. Franz Pröbst's model for cryogenic detectors has proven effective when applied to the CRESST experiment detectors. This study explores whether similar success can be achieved with COSINUS prototypes using a remoTES. The overall objective is to understand the detector parameters and their effect on the performance, to guide and accelerate our detector R&D strategy.

Keywords: COSINUS; Dark Matter; Pulse Shape; Bayes; R&D