Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 43, Issue 4
Displaying 1-3 of 3 articles from this issue
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  • On the RF Plugging
    Shoji Kojima
    1980 Volume 43 Issue 4 Pages 411-413
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.43.411
    JOURNAL FREE ACCESS
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    This short note deals with the question whether an eigenmode of an electrostatic wave is excited in the rf plugging or not.
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  • Mechanism of R. F. plugging
    Tatsuo Shoji, Tetsuo Watari, Shinji Hiroe, Teruyuki Sato
    1980 Volume 43 Issue 4 Pages 415-431
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.43.415
    JOURNAL FREE ACCESS
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    Mechanism of radio-frequency plugging and heating are described in terms of the plasma impedance. It is shown theoretically that the rf plugging effect appears in the frequency region, where the capacity of rf electrodes decreases when the plasma is filled between them. The heating occurs inversely proportional to the resistance of the electrodes. These theoretical predictions are compared with the experimental observations, demonstrating a satisfactory agreement
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  • Positional Stability of Tokamak Plasma in a l=2, m=4 Helical Field
    K. Sakurai, S. Hirokura, S. Tanahashi
    1980 Volume 43 Issue 4 Pages 433-439
    Published: 1980
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.43.433
    JOURNAL FREE ACCESS
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    The decay index of the external magnetic field of JIPP T-II torus with l=2, m=4 helical windings is investigated. The horizontal displacement of the plasma column is measured as a function of the vertical magnetic field. A following relationship δBV/δΔ_??_lhBt/2πR, where lh is the rotational transform of the helical field, Bt is the toroidal magnetic field and R is the major radius of the plasma column, is experimentally confirmed. Although the value of the decay index is negative, for example n_??_-5, the plasma column is also positionally stable in the vertical direction. The results suggest that a concept of strong focusing may be applicable.
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