Abstract: 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 presented. A prototype cryostat has been assembled and data acquired to evaluate its vacuum and thermal performance.
Revised: July 27, 2015 |
Published: April 1, 2013
Citation
Aalseth C.E., R. Bonicalzi, J.E. Fast, T.W. Hossbach, J.L. Orrell, C.T. Overman, and B.A. VanDevender. 2013.Cryostat for Ultra-low-energy Threshold Germanium Spectrometers.IEEE Transactions on Nuclear Science 60, no. 2:1168 -1174.PNNL-SA-88541.doi:10.1109/TNS.2012.2224669