Cryostat for Ultra-low-energy Threshold Germanium Spectrometers
  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. 
Craig E. Aalseth, Ricco M. Bonicalzi, James E. Fast, Todd W. Hossbach,   John L. Orrell, Cory T. Overman, Brent A. Vandevender
physics.ins-det nucl-ex