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TES-Based Light Detectors for the CRESST Direct Dark Matter Search

The CRESST experiment uses cryogenic detectors based on transition-edge sensors to search for dark matter interactions. Each detector module consists of a scintillating CaWO 4 crystal and a silicon-on-sapphire (SOS) light detector which operate in coincidence (phonon-light technique). The 40-mm-diam...

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Bibliographic Details
Published in:Journal of low temperature physics 2018-12, Vol.193 (5-6), p.1160-1166
Main Authors: Rothe, J., Angloher, G., Bauer, P., Bento, A., Bucci, C., Canonica, L., D’Addabbo, A., Defay, X., Erb, A., Feilitzsch, F. v., Ferreiro Iachellini, N., Gorla, P., Gütlein, A., Hauff, D., Jochum, J., Kiefer, M., Kluck, H., Kraus, H., Lanfranchi, J.-C., Langenkämper, A., Loebell, J., Mancuso, M., Mondragon, E., Münster, A., Pagliarone, C., Petricca, F., Potzel, W., Pröbst, F., Puig, R., Reindl, F., Schäffner, K., Schieck, J., Schipperges, V., Schönert, S., Seidel, W., Stahlberg, M., Stodolsky, L., Strandhagen, C., Strauss, R., Tanzke, A., Trinh Thi, H. H., Türkoğlu, C., Ulrich, A., Usherov, I., Wawoczny, S., Willers, M., Wüstrich, M.
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Language:English
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Summary:The CRESST experiment uses cryogenic detectors based on transition-edge sensors to search for dark matter interactions. Each detector module consists of a scintillating CaWO 4 crystal and a silicon-on-sapphire (SOS) light detector which operate in coincidence (phonon-light technique). The 40-mm-diameter SOS disks (2 g mass) used in the data taking campaign of CRESST-II Phase 2 (2014–2016) reached absolute baseline resolutions of σ = 4–7 eV. This is the best performance reported for cryogenic light detectors of this size. Newly developed silicon beaker light detectors (4 cm height, 4 cm diameter, 6 g mass), which cover a large fraction of the target crystal surface, have achieved a baseline resolution of σ = 5.8 eV. First results of further improved light detectors developed for the ongoing low-threshold CRESST-III experiment are presented.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-018-1944-x