Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 48, Issue 3
Displaying 1-2 of 2 articles from this issue
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  • New all aluminum alloy ultrahigh vacuum system
    Hajime Ishimaru
    1982 Volume 48 Issue 3 Pages 293-315
    Published: 1982
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.48.293
    JOURNAL FREE ACCESS
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    Suitable aluminum alloy flange/gasket/bolt, nut and washer combinations, vacuum chambers, bellows, feedthroughs, windows, sputter ion pumps, metal valves and related aluminum alloy vacuum components are developed for the TRISTAN electron-positron storage accelerator in National Lab. for High Energy Physics Japan. Aluminum alloy are preferred as a material for the ultrahigh vacuum system of large storage accelerator and fusion machine because of its extremely low radioactivity and extremely low outgassing rate.
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  • Equilibrium and Stability of Snake Bumpy Torus
    Jiro Todoroki
    1982 Volume 48 Issue 3 Pages 317-332
    Published: 1982
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.48.317
    JOURNAL FREE ACCESS
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    Equilibrium and stability of a toroidal closed-line configuration with finite l=±1 distortion is investigated theoretically based on new ordering assumptions. A second order nonlinear differential equation describing equilibrium is derived, and its analytical solution is obtained for the parabolic pressure profile. As the plasma pressure increases, the cross section of the plasma column elongates to the vertical direction. The growth rate for m=1 displacement is given.
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