The CRESST-III experiment which is dedicated to low-mass dark matter search uses scintillating CaWO4 crystals operated as cryogenic particle detectors. Background discrimination is achieved by exploiting the scintillating light signal of CaWO4 and by a novel active detector holder presented in this paper. In a test setup above ground, a nuclear-recoil energy threshold of Eth=(190.6±5.2)eV is reached with a 24 g prototype detector, which corresponds to an estimated threshold of ∼50 eV when being operated in the low-noise CRESST cryostat. This is the lowest threshold reported for direct dark matter searches. For CRESST-III phase 1, ten such detector modules were installed in the cryostat which have the potential to improve significantly the sensitivity to scatterings of dark matter particles with masses down to ∼0.1 GeV/c2.
Strauss, R., Angloher, G., Bauer, P., Defay, X., Erb, A., Feilitzsch, F., et al. (2017). A prototype detector for the CRESST-III low-mass dark matter search. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 845(11 February 2017), 414-417 [10.1016/j.nima.2016.06.060].
A prototype detector for the CRESST-III low-mass dark matter search
Ferreiro Iachellini N.;
2017
Abstract
The CRESST-III experiment which is dedicated to low-mass dark matter search uses scintillating CaWO4 crystals operated as cryogenic particle detectors. Background discrimination is achieved by exploiting the scintillating light signal of CaWO4 and by a novel active detector holder presented in this paper. In a test setup above ground, a nuclear-recoil energy threshold of Eth=(190.6±5.2)eV is reached with a 24 g prototype detector, which corresponds to an estimated threshold of ∼50 eV when being operated in the low-noise CRESST cryostat. This is the lowest threshold reported for direct dark matter searches. For CRESST-III phase 1, ten such detector modules were installed in the cryostat which have the potential to improve significantly the sensitivity to scatterings of dark matter particles with masses down to ∼0.1 GeV/c2.
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