Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 58, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • F-Θ Pumping
    Sadao Masamune
    1987 Volume 58 Issue 4 Pages 317-331
    Published: October 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.317
    JOURNAL FREE ACCESS
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    F-Θ pumping is a scheme for dc current drive for the Reversed Field Pinch (RFP). It utilizes the modulated toroidal and poloidal electric fields with proper phasing. The dynamics of the plasma depends upon the MHD processes. We start with the description of RFP, including the magnetic helicity, relaxation, and dynamo effect. Modeling of the F-Θ pumping follows, and the experimental results in the ZT-40M are shown. Application of this scheme to tokamaks is also discussed.
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  • Implosion by Ion Beam
    Keishiro Niu
    1987 Volume 58 Issue 4 Pages 332-342
    Published: October 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.332
    JOURNAL FREE ACCESS
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    This paper shows the typical target structure of the inertial confinement fusion by using the ion beams as the energy diver, and its optimized parameters. The phenomenon occuring at the fuel implosion in the target, from which the thermonuclear fusion output energy of 2.5 GJ is released, is analyzed, and the requirements for the driver beam are summarized.
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  • Adiabatic Lapse Rate and Temperature Profile of Tokamak Plasma
    Tihiro Ohkawa
    1987 Volume 58 Issue 4 Pages 343-349
    Published: October 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.343
    JOURNAL FREE ACCESS
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    The role of the longitudinal invariance in the trapped particle instabilities is considered. The breaking of the invariance leads to the stochastic orbits and the transport. The temperature profile that minimizes the change in the longitudinal invariant on the average is conjectured to minimize the transport rate. The profile corresponds to the adiabatic lapse rate of a one-dimensional gas.
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  • Topological Considerations on Plasma Confinement and on Related Problems in Quantum Theory
    Hiroshi Ito
    1987 Volume 58 Issue 4 Pages 350-356
    Published: October 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.350
    JOURNAL FREE ACCESS
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    When the toroidal current flows along a multiply connected region as the inside of a toroidal vessel used like a tokamak, the magnetic flux enclosed by this current loop is possibly kept constant while it may be lost in time and become unstable for the case of a spheromak whose current exists in a singly connected region. By the same kind of topological consideration, the constancy of a closed line integral of momentum, Bohr condition in quantum theory suggests to us that this contour exists in some multiply connected region. For special cases, Bohr condition reduces to interference condition of light.
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