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Physics of Plasmas / Volume 1 / Issue 2

Phys. Fluids B 1, 364 (1989); http://dx.doi.org/10.1063/1.859149 (11 pages)

Internal kink modes in the ion‐kinetic regime

F. Pegoraro1, F. Porcelli2, and T. J. Schep3

1Scuola Normale Superiore, 56100 Pisa, Italy
2Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
3FOM‐Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein, The Netherlands

(Received 13 June 1988; accepted 22 September 1988)

The m=1 kink mode is investigated in the high temperature regime where the width of the singular layer is determined by the mean ion gyroradius. This regime is reached in a number of present‐day fusion experiments with strong auxiliary heating. A dispersion relation that contains the full kinetic response of the ions is derived and analyzed. The growth rates are larger than the corresponding ones obtained from fluid theory. Diamagnetic stabilization is weaker than in the fluid case. Ion temperature gradients are shown to be stabilizing at low values of the diamagnetic frequency and destabilizing at large values.

KEYWORDS and PACS

Keywords

KINK INSTABILITY, HOT PLASMA, SINGULARITY, LARMOR RADIUS, THERMONUCLEAR REACTIONS, PLASMA HEATING, DISPERSION RELATIONS, IONS, INSTABILITY GROWTH RATES, TEMPERATURE GRADIENTS

PACS

  • 52.35.Py

    Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)

  • 52.30.Cv

    Magnetohydrodynamics (including electron magnetohydrodynamics)

  • 52.55.Fa

    Tokamaks, spherical tokamaks

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.859149

PUBLICATION DATA

ISSN

0899-8221 (print)  

For access to fully linked references, you need to log in.
    H. Altmann and the JET Team, in Plasma Physics and Controlled Nuclear Fusion Research, 1986 Proceedings of the 11th International Conference (IAEA, Vienna, 1987), Vol. I, p. 31.

    T. S. Hahm and L. Chen, Phys. Fluids 28, 3061 (1985PFLDAS000028000010003061000001).

    S. C. Cowley, R. M. Kulsrud, and T. S. Hahm, Phys. Fluids 29, 3230 (1986PFLDAS000029000010003230000001).

    F. Pegoraro and T. J. Schep, Phys. Fluids 24, 478 (1981PFLDAS000024000003000478000001).

    F. Pegoraro and T. J. Schep, Phys. Fluids 30, 3506 (1987PFLDAS000030000011003506000001).

    J. M. N. Bussac, R. Pellat, D. Ederly, and J. L. Soulé, Phys. Rev. Lett. 35, 1638 (1975).

    J. F. Drake and Y. C. Lee, Phys. Fluids 20, 1341 (1977PFLDAS000020000008001341000001).



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