New Design of an Adiabatic Demagnetization Cryostat for Space Application

  • Junya Yamamoto
  • Akio Sato
  • Masashi Sahashi
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 33)


Developing a cooling method of far-infrared detectors in micro-gravity circumstances in the 0.1 K region, we have designed a new adiabatic demagnetization cryostat and improved a fabrication method of magnetic salt. The cryostat was designed for laboratory use (under 1 G), however most thermal conditions were planned for use in space. An optical window was prepared for the real combination with detector element. The measured heat leak was about 130 mW which enabled us to operate the cryostat more than 50 hours. Low operating current superconducting magnet which was indirectly cooled by liquid helium, was mounted on the cryostat. The magnetic field of 3 T was obtained by current of 11.5 A. The success of the magnet guaranteed the system to work in space where fluid interfaces are not clear. Manganese ammonium alum was grown from the saturated solution and purified.


Noise Equivalent Power Thermal Boundary Resistance Helium Bath Hermetic Seal Cryogenic Engineer 
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  1. 1.
    J. V Radostitz, I. G. Nolt, P. Kittel, and R. J. Donnelly, Portable He detector cryostat for the far infrared, Rev. Sci. Instrum. 49:89 (1978).Google Scholar
  2. 2.
    A. R. Urbach and P. V. Mason, IRAS cryogenic system flight performance report, “Advance in Cryogenic Engineering,” Vol. 29, Plenum, New York (1984), p. 658.Google Scholar
  3. 3.
    J. Yamamoto, A ‘He cryostat using a charcoal adsoption pump for a far-infrared detector, Japan. J. Appl. Phys. 14: 1807 (1975).CrossRefGoogle Scholar
  4. 4.
    R. D. Britt and P. L. Richards, An adiabatic demagnetization refrigerator for bolometers, Int. J. Infrared and Millimeter Waves 2: 1083 (1981).CrossRefGoogle Scholar
  5. 5.
    P. Kittel, Temperature stability limits for an isothermal demagnetization refrigerator, “Advance in Cryogenic Engineering,” Vol. 29, Plenum, New York (1934), p. 613.Google Scholar
  6. 6.
    J. Yamamoto, Improvement in the heat transfer of a gas filled thermal switch, “Advance in Cryogenic Engineering,” Vol. 29, Plenum, New York (1934), p. 299.Google Scholar
  7. 7.
    Crystal Growth,” B. R. Pamplin, ed., Pergamon Press, London (1975), p. 560.Google Scholar

Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Junya Yamamoto
    • 1
  • Akio Sato
    • 2
  • Masashi Sahashi
    • 2
  1. 1.Low Temperature CenterOsaka UniversitySuita, OsakaJapan
  2. 2.Toshiba Research and Development CenterKawasaki, KanagawaJapan

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