Gram-scale cryogenic calorimeters for rare-event searches

The energy threshold of a cryogenic calorimeter can be lowered by reducing its size. This is of importance since the resulting increase in signal rate enables new approaches in rare-event searches, including the detection of MeV mass dark matter and coherent scattering of reactor or solar neutrinos....

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Bibliographic Details
Published in:Physical review. D 2017-07, Vol.96 (2), Article 022009
Main Authors: Strauss, R., Rothe, J., Angloher, G., Bento, A., Gütlein, A., Hauff, D., Kluck, H., Mancuso, M., Oberauer, L., Petricca, F., Pröbst, F., Schieck, J., Schönert, S., Seidel, W., Stodolsky, L.
Format: Article
Language:English
Subjects:
Aluminum oxide
Coherent scattering
Dark matter
Scaling laws
Searching
Solar neutrinos
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Summary:The energy threshold of a cryogenic calorimeter can be lowered by reducing its size. This is of importance since the resulting increase in signal rate enables new approaches in rare-event searches, including the detection of MeV mass dark matter and coherent scattering of reactor or solar neutrinos. A scaling law for energy threshold vs detector size is given. We analyze the possibility of lowering the threshold of a gram-scale cryogenic calorimeter to the few eV regime. A prototype 0.5 g Al2O3 device achieved an energy threshold of Eth=(19.7±0.9)  eV, the lowest value reported for a macroscopic calorimeter.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.96.022009