Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 61, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • Physics of Ultra High-Density Plasmas
    Hiroo Totsuji
    1989 Volume 61 Issue 4 Pages 207-228
    Published: April 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.207
    JOURNAL FREE ACCESS
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    A brief review is given on theoretical approaches to physical properties of high-density plasmas which are expected to be realized in the inertial confinement fusion experiments.
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  • Introduction to Superconducting Magnet Technology
    Kaoru Yamafuji
    1989 Volume 61 Issue 4 Pages 229-240
    Published: April 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.229
    JOURNAL FREE ACCESS
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    The present series of articles provide a brief review on the present status of superconducting magnet technology for nuclear fusion experimental facilities. In this article, a brief introduction is presented on basic studies for electromagnetic properties of multifilamentary superconducting wires.
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  • High Frequency Range Lower-Hybrid Current Drive on the WT-3 Tokamak
    Motomi Iida, Shunsuke Ide, Hitoshi Tanaka, Kazuo Ogura, Kazuaki Hanada ...
    1989 Volume 61 Issue 4 Pages 241-257
    Published: April 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.241
    JOURNAL FREE ACCESS
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    The lower-hybrid current drive (LHCD) experiments with a high frequency range such as ω= (2-3) × (ΩeΩi) 1/2 on the WT-3 tokamak are reported. Experimental results on current sustainment and ramp-up in the low density region are basically consistent with the predictions based on the quasi-linear theory with the finite fast electron confinement time. But the density limit for LHCD is lower than that expected from ω2-scaling. It seems that the density limit is given by ωpe2/Ωe2=1 for the high frequency range. It is concluded that increase of ω is not effective to increase the density limit for LHCD in the high frequency range.
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  • Increasing Phenomena of Microwave Powers Passed Through Radio Frequency Discharge Plasma
    Haruo Nagahama, Teruo Takamoto
    1989 Volume 61 Issue 4 Pages 258-275
    Published: April 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.258
    JOURNAL FREE ACCESS
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    Usually, microwave powers passed through conductive plasmas made with inductively coupled R. F. discharges are reduced. But, it has been observed that transmitted powers through transient stages at the transitions from weak glow-like to intense arclike R. F. discharges are increased. It has been proved experimentally that incident waves interact with oscillations excited in the transient stages and transmitted waves become beat waves of incident waves and excited oscillations. As a result, transmitted waves are amplified through these interactions. Considering incident waves and excited oscillations as the sources of energy supply, ampifications of transmitted waves have been calculated theoretically. Experimental results have been able to explain with these calculations.
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