Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 4, Issue 7
Displaying 1-3 of 3 articles from this issue
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  • Review of Physical Absorption of Gases
    Hiroshi NAKAGAWA
    1961 Volume 4 Issue 7 Pages 266-277
    Published: July 20, 1961
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.4.266
    JOURNAL FREE ACCESS
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  • A Getter Pump with Evaporation Source made of Titanium Carbide
    Saburo TABATA, Minoru IWATA
    1961 Volume 4 Issue 7 Pages 278-283
    Published: July 20, 1961
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.4.278
    JOURNAL FREE ACCESS
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    A TiC getter pump with evaporation source of TiC heater was made in order to evacuate a coating apparatus of mirror of 2.0m diameter.
    According to previous report the TiC bars were inserted into the ordinary alumina crucible which was a reservoir of molton metal. This time Ti is used in a wire form and is fed constantly onto a TiC heater. The conclusions are as follows.
    1) TiC is useful as Ti evaporating heater.
    2) When an oil diffusion pump was operated as a fore pump, the compound rate of exhaustion was, greatly affected by back diffusion of oil vapour. When the valve between the oil diffusion pump and the getter pump was appropriately opened, the rate of exhaustion was increased to a value 25 times as great as the rate when the valve was fully opened.
    3) A getter pump is not only useful for very high vacuum apparatuses with metal seals, but also, the conventional vacuum apparatus with synthetic rubber seals.
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  • On the Electron Emission Regulator Circuits with Saturable Reactor
    Fusafumi NAKAO, Isao TAKESHITA
    1961 Volume 4 Issue 7 Pages 284-290
    Published: July 20, 1961
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.4.284
    JOURNAL FREE ACCESS
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    The design and performance of emission regulator circuits for ionization gauges with saturable reactors are described.
    The simplified circuit uses a SiC varistor in place of VR-tubes or Zener diodes.
    Its stability is such that a line voltage variation of 5 volts does not change the electron emission by more than one part in 500.
    Another circuit which has the higher loop gain shows the change by less than one part in 5000 when the change in line voltage is 5 volts.
    The slightly modified circuit of this type can be used for the ion source of mass spectrometer.
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