TEMPERATURE EFFECTS ON THE CAPTURE COEFFICIENTS OF SIX COMMON GASES

Abstract

The effects of gas and cryosurface temperature on the capture coefficient of six gases are discussed. The gas temperature effect is interpreted by the critical velocity model, and the cryosurface temperature effect is qualitatively explained by the potential field model. The possible error involved when these results are extrapolated to higher gas temperatures is also discussed. Experimental results are presented for the cryopumping rates of nitrogen, argon, carbon monoxide, nitrous oxide, oxygen, and carbon dioxide over 10 to 25 K cryosurfaces and a gas temperature range of from 77 to 400 K.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1964
Accession Number
AD0600146

Entities

People

  • J. P. Dawson

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Carbon Dioxide
  • Carbon Monoxide
  • Chambers
  • Cryopumping
  • Dielectric Gases
  • Ionization Gages
  • Mass Spectrometers
  • Measurement
  • Monoxides
  • Nitrogen
  • Oxides
  • Oxygen
  • Partial Pressure
  • Pumping
  • Ultrahigh Vacuum
  • Vacuum Chambers
  • Vapor Pressure

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.