Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 44, Issue 6
Displaying 1-3 of 3 articles from this issue
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  • Plasma Confinement by Surface Magnetic Field
    Keiichi Takasugi, Hidenori Akiyama, Mutsuo Takai, Susumu Takeda
    1980 Volume 44 Issue 6 Pages 689-702
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.44.689
    JOURNAL FREE ACCESS
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    The mechanism of the plasma confinement by the surface magnetic field (SURMAC) is studied in a linear device. It is confirmed that the potential distribution produced by the charge separation is essential for the plasma confinement. The invasion distance of the plasma into the magnetic wall is much shorter than the local ion gyroradius. The end loss can be reduced by bending the SURMAC coil to have a small aperture at the both ends. The density decay is approximately explained by the ambipolar diffusion across the magnetic field and the end loss.
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  • The Application of Splittable Superconducting Coils to the Toroidal Type Fusion Reactors
    Makoto Katsurai
    1980 Volume 44 Issue 6 Pages 703-715
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.44.703
    JOURNAL FREE ACCESS
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    Various crucial design issues associated with the maintenance and repair of superconducting toroidal magnets in the commercial grade fusion reactors can be solved by providing toroidal coils with the practical splittability which enables in situ assembling and deassembling of whole Magnet systems without moving radiation shields. In this paper, based upon the D-shaped disk type coil with cold reinforcements for magnetic forces proposals for practical configurations of joints and Dewar vessels are made, and their technological features when utilized in Tokamak reactors are discussed.
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  • HEATING AND PARTICLE TRANSPORT DUE TO LOWER-HYBRID PARAMETRIC INSTABILITY
    Hiroshi Fujiyama, Yukio Watanabe, Masanori Akazaki
    1980 Volume 44 Issue 6 Pages 717-733
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.44.717
    JOURNAL FREE ACCESS
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    The lower-hybrid parametric resonant decay instability (decay into electrostatic lower-hybrid waves and backward ion-cyclotron waves) driven by a modulated electron beam is experimentally investigated.
    From the measurement of the phase difference between density-and potential-fluctuation of backward ion-cyclotron waves, it is clarified that the former leads the latter concomitant with the growth of instabilities. Also, it is experimentally verified that the increase of this phase difference is followed by the anomalous increase of plasma particle flux across a magnetic field over the classical Simon diffusion.
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