Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 10, Issue 1
Displaying 1-5 of 5 articles from this issue
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  • Motion of Electrons in Magnetic Bottle
    Shuji Fukui, Satio Hayakawa, Tadao Honzawa, Hiroyuki Nishimura, Haruo ...
    1963 Volume 10 Issue 1 Pages 1-21
    Published: 1963
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.10.1
    JOURNAL FREE ACCESS
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    The motion of a charged porticle injected in an axially symmetric magnetic bottle is investigated. The canonical formalism developed in a foregoing paper is applied to the case of an off-axis region, where the ratios of the gyroradius to the radius of curvature of the magnetic line of force and to the radial distance from the axis are considered to be small. An expansion of the Hamiltonian with respect to these ratios is performed, and use of the perturbation theory is made. The reroth order theory is readily soluble and coincides with the usual Alfven theory of the guiding center. The first order corrections are calculated in Born-Oppenheimer's approximation, and the change in the magnetic moment associated with the gyration is given explicitly. The result obtained is in good agreement with Kruskal's general consideration. The mirror points are not fixed but are shifted at eyery turn according with the gyration phase. Some remarks on the higher order corrections are also given.
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  • Gravitational Instability in a Plasma in a Magnetic Field
    I. Ideal Magnetohydrodynamics
    I. Kawakami, M. Sato
    1963 Volume 10 Issue 1 Pages 22-31
    Published: 1963
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.10.22
    JOURNAL FREE ACCESS
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  • Gravitational Instability in a Plasma in a Magnetic Field
    II. Effects of Finite Resistivity
    [in Japanese], [in Japanese]
    1963 Volume 10 Issue 1 Pages 32-46
    Published: 1963
    Released on J-STAGE: August 16, 2011
    DOIhttps://doi.org/10.1585/jspf1958.10.32
    JOURNAL FREE ACCESS
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    Effects of finite resistivity, η, on gravitational instability are investigated in magnetohydrodynamical approximation. It is shown that resistivity has a stabilizing effect on this instability. Main approximations used are : (1) small resistivity, v/L2<<ω0, where ν=c2η/4π, L=|B/∇B|≡LBor|ρ/∇ρ|≡Lρ, and ωo2=g (1/LB+1/Lρ); (2) strong mgnetic field, ωA>>ωo andP<<B2/8π where ωA is Alfvén frequency. Two cases are examined where plasma is partially ionized (v∞1/ρ) and fully ionized (v∞T-3/2).
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  • Effect of Collision on Recovery of Density Perturbation in Plasma
    Takayoshi Okuda
    1963 Volume 10 Issue 1 Pages 47-59
    Published: 1963
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.10.47
    JOURNAL FREE ACCESS
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    Dynamic response of plasma to a density perturbation is analysed in macroscopic approximation taking collision efiect into account. Ion motion cosidered to be slowest processes is concerned. An interesting result is that when quasi-steady approach is made use the response is not oscillatory, but the state approachs the equilibrium state with a time constant de-pending on the plasma density and the mobility.
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  • Hydromagnetic Waves in a Pinch Discharge Plasma.
    Yoshiei Nakano, Izumi Hayashi
    1963 Volume 10 Issue 1 Pages 60-84
    Published: 1963
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.10.60
    JOURNAL FREE ACCESS
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