Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 13, Issue 6
Displaying 1-3 of 3 articles from this issue
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  • Calibration Systems and Standard for Vacuum Gauges
    Katsuya NAKAYAMA
    1970 Volume 13 Issue 6 Pages 195-203
    Published: June 20, 1970
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.13.195
    JOURNAL FREE ACCESS
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  • PbO Thin Films Evaporated in Vacuum
    Yoichi MURAYAMA, Kunihiro KASHIWAGI
    1970 Volume 13 Issue 6 Pages 204-209
    Published: June 20, 1970
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.13.204
    JOURNAL FREE ACCESS
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    PbO Thin films were prepared by evaporating powder of yellow PbO in vacuum. The evaporation was carried out in an ordinary evacuation unit by heating and flashing methods. Slide glasses and the cleavage faces of NaCl were used as substrates at various temperature. The structure of films were investigated by X-ray and electron diffraction analyses. The orthorhombic PbO was observed in film deposited at high substrate temperature and slow evaporation rate in high vacuum, while the tetragonal PbO was observed in case of low substrate temperature and fast evaporation rate in low vacuum. The optical and electrical properties of films were dependent on the crystal structure.
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  • An Electron Emission Regulator and a Filament Protector for an Ionization Gauge
    Kazutoshi NAGAI
    1970 Volume 13 Issue 6 Pages 210-214
    Published: June 20, 1970
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.13.210
    JOURNAL FREE ACCESS
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    A transistorized electron emission regulator and a transistorized filament protector for an ionization gauge have been studied. This electron emission regulator having a current path from filament of the ionization gauge to ground through base-emitter junction of a transistor, electron emission current of the gauge modulates the collector current of the transistor, and this modulated collector current regulates the heating current for the gauge filament. On the other hand, this filament protector is a type to detect voltage increase across the filament when vacuum pressure increases. These circuits are smallsized, of light weight and inexpensive, and moreover are seldom out of order because they are very simple.
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