Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 193, Issue 5-6, Pages 1160-1166Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-018-1944-x
Keywords
Transition-edge sensor; Cryogenic light detector; Direct dark matter search
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Funding
- Max Planck Society
- STFC [ST/N000447/1] Funding Source: UKRI
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The CRESST experiment uses cryogenic detectors based on transition-edge sensors to search for dark matter interactions. Each detector module consists of a scintillating CaWO4 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 sigma = 4-7eV. 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 sigma = 5.8 eV. First results of further improved light detectors developed for the ongoing low-threshold CRESST-III experiment are presented.
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