Optimisation of TES design for the CRESST experiment
G. Angloher, S. Banik, A. Bento, A. Bertolini, R. Breier, C. Bucci, J. Burkhart, L. Burmeister, L. Canonica, E. Cipelli, S. Di Lorenzo, J. Dohm, F. Dominsky, A. Erb, E. Fascione, F. v. Feilitzsch, S. Fichtinger, D. Fuchs, V.M. Ghete, P. Gorla, P.V. Guillaumon, S. Gupta, D. Hauff
TL;DR
This paper presents optimization studies of W-TES sensors in the CRESST experiment, improving detector performance for low-mass dark matter detection at cryogenic temperatures.
Contribution
It investigates the effects of phonon collector properties on W-TES sensor performance, establishing new benchmarks for CRESST detectors.
Findings
Significant performance enhancement achieved.
Optimized phonon collector design improves signal-to-noise ratio.
New detector benchmarks established for dark matter detection.
Abstract
The CRESST experiment aims at the direct detection of sub-GeV dark matter particles via elastic scattering off nuclei in different target crystals at cryogenic temperatures. The advancement in W-TES sensors allowed the CRESST detectors to reach energy thresholds of 10 eV and lower, opening the way to the exploration of dark matter masses as low as 70 MeV/c2. This work presents optimisation studies of W-TESs aimed at further improving the signal-to-noise ratio and overall detector performance. In particular, we investigate the thickness, dimensions and material composition of phonon collectors and assess their impact on detector response. The results demonstrate a significant performance enhancement and establish new benchmarks for the sensors used within CRESST.
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