Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 19: Search for Dark Matter I

T 19.8: Vortrag

Montag, 31. März 2025, 18:30–18:45, VG 4.102

Results of the double-TES in the CRESST experiment — •Felix Dominsky — Max-Planck-Institut für Physik

CRESST is a leading direct dark matter search experiment that employs transition edge sensors (TES) to detect energy depositions in cryogenic target crystals. Like many experiments in this field, CRESST observes an excess of events near the detector threshold, commonly referred to as the low-energy excess (LEE). This phenomenon poses a significant challenge to the sensitivity of the experiment, particularly for light dark matter detection. To investigate the origin of the LEE, CRESST has developed the double-TES module, featuring two identical TESs on a single target crystal. A particle interaction in the bulk of the crystal is sensed in both TES, whereas events detected in only one TES can be excluded as valid particle interactions. This presentation will detail the operating principle of the double-TES and highlight new insights into the LEE derived from this technology.

Keywords: CRESST; TES; Dark Matter; Cryogenics; low energy excess