Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 51, Issue 4
Displaying 1-3 of 3 articles from this issue
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  • Hall Effect in the Plasma Current Sheet
    Y. Yagi, N. Kawashima
    1984 Volume 51 Issue 4 Pages 255-264
    Published: May 20, 1984
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.51.255
    JOURNAL FREE ACCESS
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    We produce the plasma current sheet in the quadrupole magnetic field which is a basic configuration when magnetic field line reconnection is studied, and we investigate its basic properties. In this configuration, it is discerned that a finite Hall electric field and llall current exist and the Hall electric field is proportinal to (λi/λ) Ey E. (λi : ion inertia length, λ : one half of the thickness of the plasma current sheet, Ey : electric field along the main plasma current) These facts are important because they modify the equlibrium of the plasma current sheet and tearing mode instability.
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  • Heating in Toroidal Plasmas
    Shigetoshi Tanaka, Tsutomu Kuroda, Kazuo Odajima
    1984 Volume 51 Issue 4 Pages 265-288
    Published: May 20, 1984
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.51.265
    JOURNAL FREE ACCESS
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    Introductory explanation and present status on heating and non-inductive current drive in toroidal plasmas, mainly in tokamak plasmas, are described. All the methods of heating and current drive are presented, that is, the neutral beam injection and the radio-frequency (wave) heating. In the latter are included the electron cyclotron, the lower hybrid and the ion cyclotron range of frequency heatings.
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  • Three dimensional simulation of relaxation process in spheromak configuration
    Kozo Katayama, Tomoho Yamada, Makoto Katsurai
    1984 Volume 51 Issue 4 Pages 297-302
    Published: May 20, 1984
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.51.297
    JOURNAL FREE ACCESS
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    Relaxation processes toward the lower energy states in spheromak configurations were studied by means of three dimensional magnetohydrodynamic simulations. For the initial conditions, two cases of equilibrium states were given and the temporal evolutions of the instabilities were investigated in the nonlinear regime. In the first case, which has a high q-profile (1.7 at the magnetic axis), the poloidal flux amplification was observed through the development of a m=1, n=1 mode. This process can be explained by the Kadomtsev internal disruption model. In the second case, which has a low q-profile (0.12 at the magnetic axis), magnetic flux conversion from the poloidal to the toloidal direction toward the Taylor minimum energy state was observed through the development of a m=1, n=4 kink mode. It is expected that this process is related to the self-reversal mechanism in a reversed field pinch.
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