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Gram-scale cryogenic calorimeters for rare-event searches
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abstract
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 Al$_2$O$_3$ device achieved an energy threshold of (${19.7\pm0.1}$) eV, the lowest value reported for a macroscopic calorimeter.
Forward citations
Cited by 3 Pith papers
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Prospect of the NUCLEUS Experiment at Chooz for Coherent Elastic Neutrino-Nucleus Scattering and New Physics Searches
Assuming the low-energy background can be eliminated, a 7-gram NUCLEUS detector at Chooz is projected to see coherent neutrino-nucleus scattering at 4.7σ in one year and to set competitive bounds on new neutrino interactions.
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Sub-keV Electron Recoil Calibration for Macroscopic Cryogenic Calorimeters using a Novel X-ray Fluorescence Source
A two-stage X-ray fluorescence source provides calibration lines from 677 eV to 8 keV, revealing a nonlinear response in a gram-scale cryogenic calorimeter.
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Neutrino NSI in archaeological Pb
RES-NOVA with a 0.1 keV threshold and 1 ton·yr exposure could probe neutrino non-standard interactions beyond current global constraints, especially in the eτ sector.
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