Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 68, Issue 5
Displaying 1-4 of 4 articles from this issue
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  • The Role of Vacuum Technology in Plasma Confinement Research and Fusion Reactor Development
    Yoshio Murakami
    1992 Volume 68 Issue 5 Pages 467-479
    Published: November 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.68.467
    JOURNAL FREE ACCESS
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    The role of vacuum technology in plasma confinement research and in fusion reactor development is briefly reviewed and discussed. Various wall materials and surface conditioning techniques have been developed since 1970's to solve the impurity and density control problems for pulse-operated plasma confinement devices. These works bring about a new domain in the vacuum technology. Although some special vacuum components and techniques have been applied to practical uses in the construction phase of large tokamak devices, the improved vacuum technology for heavier load operation is still needed to realize a steady-state fusion reactor.
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  • A Review of Textbooks on Plasma Physics
    Yukio Midzuno
    1992 Volume 68 Issue 5 Pages 480-487
    Published: November 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.68.480
    JOURNAL FREE ACCESS
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    Considerations are given of the nature of textbooks on the plasma physics and brief comments are added on some selected textbooks at hand.A list of textbooks which are written in English or Japanese is given at the end of the Review.
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  • Plasma Undulator
    Yasuo Suzuki
    1992 Volume 68 Issue 5 Pages 488-502
    Published: November 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.68.488
    JOURNAL FREE ACCESS
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    Two types of the undulator which is developed as a generator of the highly brilliant light for the synchrotron radiation sources and the free electron lasers, are newly proposed using the array of slender plasmas columns.One is the magnetic field type, in which the undulator force on the relativistic electron beam is generated with the electric current flowing through the plasma columns.The other is the electricfield type, in which the undulator force is generated with the periodic variation of the density between the slender plasma columns.The production methods and the stabilization ones of plasma columns are discussed.
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  • Physical Mechanism of Eψ-driven Current in Asymmetric Toroidal System
    Noriyoshi Nakajima, Masao Okamoto, Masami Fujiwara
    1992 Volume 68 Issue 5 Pages 503-510
    Published: November 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.68.503
    JOURNAL FREE ACCESS
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    Physical mechanism of the Eψ-driven neoclassical current which exists only in asymmetric toroidal systems is clarified.It is found that symmetry-breaking, violating the total angular momentum conservation, changes the direction of flow and heat flux to be damped by the parallel viscosities. The change in the direction depends on the collisionality through the gemetric factor which reflects symmetry-breaking. As a result, in contrast to symmetric toroidal systems, the flow and heat flux due to the radial electric field Eψ can be damped according to the collisionality in asymmetric toroidal systems.If dominant species such as electrons and primary ions have different collisionalities, there remains a difference between the flows due to Eψ, hence a parallel current proportional directly to the radial electric field, i.e., the Eψ-driven current, is generated in asmmetric toroidal systems in spite of the charge neutrality condition.
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