Title :
A 20 mK temperature sensor
Author :
Wang, N. ; Sadoulet, B. ; Shutt, T. ; Beeman, Jeffrey ; Haller, E.E. ; Lange, A. ; Park, I. ; Ross, R. ; Stanton, C. ; Steiner, H.
Author_Institution :
California Univ., Berkeley, CA, USA
Abstract :
The authors report tests of a 20-mK temperature sensor made of neutron-transmutation-doped (NTD) germanium, which they have developed for use as a phonon detector in a dark matter search. Current-voltage, responsivity, and AC measurements have been made, and the minimum detectable energy has been estimated. They have found that NTD germanium thermistors around 20 mK have resistances that are a strong function of temperature and have sufficient sensitivity to eventually reach a base line RMS energy fluctuation of 6 eV at 25 mK. The authors consider that further work is needed to understand the extreme sensitivity of the thermistors to bias power.<>
Keywords :
resistance thermometers; temperature measurement; thermistors; 20 mK; 20 mK temperature sensor; AC measurements; I-V measurements; base line RMS energy fluctuation; dark matter search; neutron transmutation doped Ge; phonon detector; responsivity; thermistors; Current measurement; Detectors; Electrical resistance measurement; Energy measurement; Fluctuations; Germanium; Phonons; Temperature sensors; Testing; Thermistors;
Journal_Title :
Nuclear Science, IEEE Transactions on
