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Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 13, Issue 1
Displaying 1-2 of 2 articles from this issue
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  • The Use of Plasmas and Ion Beams in Vacuum Systems
    L. Holland
    1970 Volume 13 Issue 1 Pages 6-22
    Published: January 20, 1970
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.13.6
    JOURNAL FREE ACCESS
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  • Measurement of Outgassing Rates from Materials by differential pressure rise method
    Nagamitu YOSHIMURA, Hisashi OIKAWA, Osamu MIKAMI
    1970 Volume 13 Issue 1 Pages 23-28
    Published: January 20, 1970
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.13.23
    JOURNAL FREE ACCESS
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    This paper deals with the differential pressure rise method employed to measure the outgassing rates. With this method, measurement errors due to outgassing from the test-dome surface, gas absorption of the test-dome surface and the pumping of the ionization gauge used can be considerably reduced.
    Auxiliary experiments were carried out to determine the pumping speed of the gauge used. Under some assumptions, errors, introduced in the outgassing rates measured with the differential pressure rise method, were discussed. For the examples of outgassing datas measured with this method, ones of Viton 'A', Teflon, steatite and porous alumina are presented in this paper. For the standpoint of simplicity and accuracy, it can be concluded that the differential pressure rise method is highly suitable for outgassing measurement at room temperature in respect of nonmetallic materials.
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