Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 61, Issue 2
Displaying 1-3 of 3 articles from this issue
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  • Laser Fusion and Impact to Advanced Science and Technology
    Sadao Nakai
    1989 Volume 61 Issue 2 Pages 77-94
    Published: February 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.77
    JOURNAL FREE ACCESS
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    The recent progress of laser fusion is reviewed with the intensified scope into the engineering aspect in the research. The developments of technologies on (1) high power laser, (2) pellet fabrication, (3) computer simulation and (4) implosion diagnostics are remarkable and results in the progress of the implosion parameter. Their impacts to the advanced technologies in wide field are presented.
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  • Relativistic Astrophysical Plasmas
    Fumio Takahara
    1989 Volume 61 Issue 2 Pages 95-105
    Published: February 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.95
    JOURNAL FREE ACCESS
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    Selected theoretical topics in high energy astrophysics are discussed. Firstly an account is given of accretion disks around a massive black hole and radiation processes in hot thermal plasmas. Then recent studies on the effects of electron-positron pairs in relativistic thermal plasmas are summarized. Finally the diffusive mechanism of the particle acceleration by shock waves is presented. Each topic poses interesting problems to basic plasma physics.
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  • Toroidal Plasma Current Startup and Sustainment by RF in the WT-3 Tokamak
    Kazuo Ogura, Hitoshi Tanaka, Shunsuke Ide, Motomi Iida, Kazuaki Hanada ...
    1989 Volume 61 Issue 2 Pages 106-127
    Published: February 20, 1989
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.61.106
    JOURNAL FREE ACCESS
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    The toroidal plasma current is started up by rf power alone and is ramped up to above 20 kA in a low density plasma. The fraction εR of injected LHW power is converted into poloidal magnetic field energy and its maximum value is about 5 %. For high density cases, a quasi-steady state discharge is obtained and the figure of merit ηCD for steady current drive by LHW is about 0.04 × 1019 (A·m-2/W). The direct loss of fast electrons from the plasma is very large and results in the low εR and ηCD in our experiments.
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