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Vacuum Pumping with Cryogenic Fluids

  • W. W. Balwanz
  • J. M. Singer
  • N. P. Frandsen
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 6)

Abstract

High pumping rate systems have been utilized for a number of years for simulating altitudes of 30 miles or less. The simulation of appreciably higher altitudes with high gas release rates is not practical unless new and improved pumping techniques are utilized, Studies of various techniques are being conducted in an effort to find better methods for space simulation, Pumping methods of interest are enumerated in Table I.
Table I

Pumping Methods

1.

Mechanical displacement

a. Rotary pumps

b. Blowers

2.

Momentum transfer

a. Diffusion pumps

b. Jet ejectors

3.

Chemical or electric bond attachment

a. Two-phase or cryogenic pumps

b. Ion pumps

c. Getters

d. Combustion

e. Adsorption

4.

Matrix trapping

a. Interment

b. Absorption

Keywords

Liquid Helium Liquid Hydrogen Cold Wall Inlet Port Diffusion Pump 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1961

Authors and Affiliations

  • W. W. Balwanz
    • 1
  • J. M. Singer
    • 1
  • N. P. Frandsen
    • 1
  1. 1.U.S. Naval Research LaboratoryUSA

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