Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 21, Issue 9
Displaying 1-3 of 3 articles from this issue
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  • On the Energy Spread of T-F Emitted Electrons
    Hiroshi ADACHI
    1978 Volume 21 Issue 9 Pages 293-306
    Published: September 20, 1978
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.21.293
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Construction of Sputter Ion Source and Application to IMA Analysis
    Tohru ISHITANI, Hifumi TAMURA, Ichiro KANOMATA
    1978 Volume 21 Issue 9 Pages 307-314
    Published: September 20, 1978
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.21.307
    JOURNAL FREE ACCESS
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    This paper describes a sputter ion source which makes use of secondary ions emitted from ion-bombarded solids, so which gives ion beam of any element in solid state. As a preliminary application, this source has been used as an ion source of IMA. Two samples of GaAs and AgAu-alloy were analyzed under the bombardment of alkali-metal ion beam of 10 to 60 nA and about 1 mm in diameter. It was shown that the alkali-metal ion bombardment gives more current of negative secondary ions for elements with strong electron affinity than that given by O2+ ion bombardment.
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  • Friction Welding of Ultrahigh Vacuum Transition between Aluminium Alloy and Stainless Steel
    Hajime ISHIMARU, Torazo NAIKI, Satio SETO
    1978 Volume 21 Issue 9 Pages 315-322
    Published: September 20, 1978
    Released on J-STAGE: September 29, 2009
    DOIhttps://doi.org/10.3131/jvsj.21.315
    JOURNAL FREE ACCESS
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    Friction welding has been developed at KEK to join aluminium alloy vacuum chambers to stainless steel vacuum components of an electron storage ring. The stainless steel surface is electroplated with silver to a thickness of 10 μm before welding. Additional procedures such as complicated pre-treatment for electroplating, various heat treatment and various cleaning procedures are not required. Fabricated transitions up to 100 mm in diameter have been obtained. Some units have been tested for mechanical and vacuum leak properties as beam ducts. It has been found that the strength of the bonding plane is very strong and fracture of the tensile specimens occurs not at the bonded plane but at the aluminium alloy part, and that vacuum leak does not occur for heat cycles up to 200°C. Welds torerate thermal shock to liquid nitrogen temperature and remain leak-tight.
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