Gettering of Residual Gas and the Adsorption of Hydrogen on Evaporated Molybdenum Films at Liquid-Nitrogen Temperatures

  • A. L. Hunt
  • C. C. Damm
  • E. C. Popp
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 8)


It has been established that evaporated molybdenum films at room temperature are effective adsorbers of hydrogen and most residual gases in ultrahigh-vacuum systems [1]. Preliminary experiments indicated additional adsorption was possible if the molybdenum was evaporated onto a liquid-nitrogen-cooled surface[2]. The objectives of the present experiments were: (1) to ascertain the magnitude of the pressure reduction due to adsorption in a baked vacuum system as compared with an unbaked system; (2) to identify the gaseous components adsorbed; and (3) to measure the pumping speed of hydrogen on molybdenum films at room and liquid-nitrogen temperatures.


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Copyright information

© Springer Science+Business Media New York 1963

Authors and Affiliations

  • A. L. Hunt
    • 1
  • C. C. Damm
    • 1
  • E. C. Popp
    • 1
  1. 1.Lawrence Radiation LaboratoryUniversity of CaliforniaLivermoreUSA

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