Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
Volume 60, Issue 6
Displaying 1-3 of 3 articles from this issue
  • Kenji Watanabe
    1988 Volume 60 Issue 6 Pages 377-405
    Published: December 20, 1988
    Released on J-STAGE: August 16, 2011
    JOURNAL FREE ACCESS
    Trend of the tokamak reactor design works so far carried out is reviewed, and method of conceptual design for commercial fusion reactor is critically considered concerning the black-box concepts. System-framework of the engineering of magnetic fusion (commercial) reactor design is proposed as four steps. Based on it the next design studies are recommended in parallel approaches for making real-overcome of reactor material problem, from the view point of technological realization and not from the economical one. Real trials are involved.
    Download PDF (3359K)
  • Kiyoshi Maezawa
    1988 Volume 60 Issue 6 Pages 406-418
    Published: December 20, 1988
    Released on J-STAGE: March 04, 2011
    JOURNAL FREE ACCESS
    The basic properties of the solar wind and its interaction with the earth's magnetosphere are reviewed in comparison with recent spacecraft observations. It is emphasized that the plasma distribution function of the solar wind is grossly consistent with the idea that the solar wind can be treated macroscopically as a fluid, whereas the existence of high speed streams requires a heat source which is probably due to certain microscopic processes such as dissipations of MHD waves. The observation of solar wind interaction with the earth's magnetosphere suggests that the basic concept of magnetic field reconnection would be correct, but the theories should be modified to accomodate the complexity of the real flow configurations.
    Download PDF (1525K)
  • Osamu Fukumasa
    1988 Volume 60 Issue 6 Pages 419-435
    Published: December 20, 1988
    Released on J-STAGE: August 16, 2011
    JOURNAL FREE ACCESS
    Production of H- ions in a steady state hydrogen discharge plasma is discussed. According to the numerical calculation of a set of particle balance equations, H- ions are formed mainly by dissociative attachment of slow plasma electrons (i. e. electron temperature Te≅1eV) to highly vibrationally excited hydrogen molecules H2* (optimum vibrational level v “=7-9), and those H2* (v”) are produced mainly by collisional excitation due to fast primary electrons with energies in excess of 40 eV. On enhancement of H- yield, the effect of other H2* (v “) formation process caused by molecular ions or by atomic hydrogen is also discussed.
    Although H2* (v”) is essential to the H-formation, the optimum plasma conditions for the H2* (v″) production are not compatible with those for the H- formation. In order to clarify the effectiveness of a tandem two-chamber system, the relative H- yields for single-chamber and tandem two-chamber systems are compared.
    Download PDF (1510K)
feedback
Top