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- Title
Development of Active Gas-Gap Heat Switch for Double-Stage Adiabatic Demagnetization Refrigerators.
- Authors
Ishisaki, Y.; Henmi, K.; Akamatsu, H.; Enoki, T.; Ohashi, T.; Hoshino, A.; Shinozaki, K.; Matsuo, H.; Okada, N.; Oshima, T.
- Abstract
We designed and fabricated an active gas-gap heat switch (AGGHS), which ON/OFF the heat conduction between the 1st stage (0.05-2 K) and the 2nd stage (1-4 K) of a double-stage adiabatic demagnetization refrigerator (DADR). Our design geometrically separates two components which dominates the ON or OFF performance, and achieved heat conductivity of 6 mW/K (ON) or 4 μW/K (OFF) at 2 K. The ON/OFF is controlled by a heater attached to the charcoal box to adsorb/deadsorb He gas inside. We introduced the AGGHS to the DADR and successfully cooled the detector stage down to 60 mK, working properly more than a year.
- Subjects
ADIABATIC demagnetization; REFRIGERATORS; MICROFABRICATION; HEAT conduction; CHARCOAL; CALORIMETERS; HELIUM; GAS absorption &; adsorption
- Publication
Journal of Low Temperature Physics, 2012, Vol 167, Issue 5/6, p777
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-012-0594-7