A Helium3 Refrigerator

  • C. J. Rauch
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 6)


Temperatures in the neighborhood of 1.25°K are conveniently obtained by reducing the pressure on a liquid He4 bath in an appropriate dewar system. Below this temperature. the vapor pressure of the saturated liquid is so small that limitations on lowering the temperature are imposed by a rapid decrease in the pumping speed of the vacuum pumps. For He3 the vapor pressure for a given temperature is much larger than for He4 and will enable one to obtain temperatures in the neighborhood of 0.35°K.


Vapor Pressure Data Saturated Liquid Density Ultimate Temperature Mercury Diffusion Evaporator Pressure 
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Copyright information

© Springer Science+Business Media New York 1961

Authors and Affiliations

  • C. J. Rauch
    • 1
  1. 1.Lincoln LaboratoryMassachusetts Institute of TechnologyLexingtonUSA

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