Low-Cost, Compact Dilution Refrigerator: Operation from 200 to 20 mK

  • P. R. Roach
  • K. E. Gray
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 33)

Abstract

We have developed a self-contained (portable) 3He-4He dilution refrigerator which has been operated below 0.020 K without the use of external pumps or gas handling system. Using charcoal pumps for all pumping, the system requires, besides the usual liquid helium and nitrogen baths, only modest electronics for heaters and thermometers. This device has the advantages of low cost and simple operation and does not require extensive maintenance or operator expertise. The refrigerator can operate below 0.020 K for more than 10 hours before the charcoal pumps need to be recycled.

Keywords

Helium Charcoal 

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References

  1. 1.
    O. V. Lounasmaa, “Principles and Methods Below 1 K”, Academic Press, London (1974), Chap. 3.Google Scholar

Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • P. R. Roach
    • 1
  • K. E. Gray
    • 1
  1. 1.Materials Science DivisionArgonne National LaboratoryArgonneUSA

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