Craig E. Aalseth, Ricco M. Bonicalzi, James E. Fast, Todd W. Hossbach, John L. Orrell, Cory T. Overman, Brent A. Vandevender
This paper presents progress on the development of a cryostat intended to improve upon the low-energy threshold (below 0.5 keV) of p-type point contact germanium gamma-ray spectrometers. Ultra-low energy thresholds are important in the detection of low-energy nuclear recoils, an event class relevant to both dark matter direct detection and measurement of coherent neutrino-nucleus scattering. The cryostat design, including a thermal and electrical-field model, is given. A prototype cryostat has been assembled and data acquired to evaluate its vacuum and thermal performance.
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http://arxiv.org/abs/1210.2347
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