Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 28, Issue 5
Displaying 1-3 of 3 articles from this issue
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  • Experiment on the Amplifying Waves due to the Ion Beam-Plasma Interaction
    Sadao Nakamura, Tetumori Yuyama, Hiroshi Kubo, Kenji Mitani
    1972 Volume 28 Issue 5 Pages 251-264
    Published: 1972
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.28.251
    JOURNAL FREE ACCESS
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  • On steady Tokamak with Relativistic Electrons
    K. Ikuta
    1972 Volume 28 Issue 5 Pages 265-269
    Published: 1972
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.28.265
    JOURNAL FREE ACCESS
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    A simple method of maintaining a toroidal current in resistive plasmas is proposed. A high current relativistic electron ring with its major radius approximately equal to that of toroidal plasma and a Low intensity ion beam are injected into the plasma. The resultant increase in the plasma current compensates for the decay. of the current due to the plasma resistivity. It turns out that ion beam current required may be much smaller than that of the electron ring.
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  • Theory of Amplitude Modulation of Quasi-Monochromatic Nonlinear Plasma Wave
    Takehiko Suzuki, Yoshi H. Ichikawa
    1972 Volume 28 Issue 5 Pages 270-291
    Published: 1972
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.28.270
    JOURNAL FREE ACCESS
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    Theory of amplitude modulation of plasma wave is developed by applying the Karpman-Krushkal theory of quasi-monochromatic wave propagation in nonlinear-dispersive media to the Vlasov plasma. As a result of careful analysis of nonlinear resonant effect between wave and particles, it is shown that the modulation of complex amplitude A (x, t) of the potential wave in plasmas is described by the modified nonlinear Schrodinger equation i (∂/∂t+λ∂/∂x) A+p∂2/∂x2A+q|A|2A+s_??_/π∫|A (x', t)|2/x-x'dx'A+irA=0
    Where λ is the group velocity of the wave. The coefficients q and s involves contributios of the resonant interaction of particles and wave at the group velocity, while the coefficient r represents the linear Landau damping rate, and P ex presses the dispersion effect defined as (1/2) ∂λ/∂k.
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