Calculated and Observed Pumping Speeds of a Shielded Cryogenic Pumping Surface

  • F. C. Hurlbut
  • R. J. Mansfield
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 8)


The design of cryogenic pumping systems for large space environment simulators involves a trade-off between refrigeration capacity requirement and pumping performance. The low-temperature (about 20°K) surfaces needed to condense nitrogen and oxygen must be shielded from thermal radiation to minimize the load on their refrigeration system, but the shielding surfaces also cause a significant reduction in pumping capability, as measured by the pumping speed of the system for “permanent” gases.


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  1. 1.
    S. N. Foner, F. A. Mauer, and L. H. Bolz, J. Chem. Phys., Vol. 31, No. 2 (Aug. 1959).Google Scholar
  2. 2.
    D. C. Hamilton and W. R. Morgan, “Radiant-Interchange Configuration Factors,” NACA Tech, Note 2836 (Dec. 1952).Google Scholar
  3. 3.
    R. J. Mansfield and F. C. Hurlbut, “Computation of Pumping Speed of a Cryogenic Pumping Module by the Multiple-Reflection Method.” General Electric Co. (MSVD) Technical Information Series (to be published).Google Scholar

Copyright information

© Springer Science+Business Media New York 1963

Authors and Affiliations

  • F. C. Hurlbut
    • 1
  • R. J. Mansfield
    • 2
  1. 1.University of CaliforniaBerkeleyUSA
  2. 2.General Electric CompanySchenectadyUSA

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