Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 6, Issue 3
Displaying 1-3 of 3 articles from this issue
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  • Space Simulation Chamber
    Takashi MATUMOTO
    1963 Volume 6 Issue 3 Pages 74-88
    Published: March 20, 1963
    Released on J-STAGE: January 28, 2010
    DOIhttps://doi.org/10.3131/jvsj.6.74
    JOURNAL FREE ACCESS
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  • Performance of an Ultra-High Vacuum System Employing Sorption Pump and Getter-Ion Pump
    Zenjiro ODA, Tatsuo ASAMAKI
    1963 Volume 6 Issue 3 Pages 89-95
    Published: March 20, 1963
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.6.89
    JOURNAL FREE ACCESS
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    The performance of an experimental ultra-high vacuum system employing the combination of a sorption pump and a getter-ion pump is described. Measurements done on this system using dry air indicate that the most suitable pressure for switching-on the getter-ion pump is 12 × 10-2 mmHg, and for closing the valve for rough pumping is 57 × 10-3 mmHg. The start of getter-ion pump and its pumpdown characteristics are significantly affected by water vapor in the ambient, to which the system is exposed The warming up of the getter-ion pump during rough pumping or self-heating by pump current has a marked effect to improve the performance of the system. Some remarks are made on the merits of internal heater which is fitted into the getter ion pump.
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  • Studies of Melting by 60kW Electron Beam Furnace.
    Akio MATUZAWA, Masatoshi KOSAKI, Hiroyuki HIRUTA, Seiichiro KASHU, Chi ...
    1963 Volume 6 Issue 3 Pages 96-107
    Published: March 20, 1963
    Released on J-STAGE: January 28, 2010
    DOIhttps://doi.org/10.3131/jvsj.6.96
    JOURNAL FREE ACCESS
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    Some design features of a 60 kW remote controllable gun type electron beam furnace are described.
    Distance between the target crucible and the cathode was about 1.3 meter. This rather long distance prevents apparently contamination from the cathode materials by evaporation of sputtering. After 150 hrs of melting the cathode seemed slightly to be eroded by ionic bombardment but it could be put into further service.
    Various forms of tanalum, tungsten, and other refractory metals were melted satisfactorily by using the furnace.
    Optimization of operating variables for melting tantalum was also studied.
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