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Two-dimensional structures in a plane perpendicular to the magnetic field, of the low-frequency turbulence in a toroidal plasma, have been studied. The probability distribution functions for the densi...
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Effect of a nonuniform resistive wall on the stability of tokamak plasmas

Phys. Plasmas 1, 2931 (1994); doi:10.1063/1.870533

Issue Date: September 1994

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Richard Fitzpatrick
Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712
The effect of a nonuniform resistive wall on the stability of plasma magnetohydrodynamical (MHD) modes is examined. For the case of a tokamak plasma interacting with a wall possessing toroidally nonuniform electrical resistance, the kink mode dispersion relation is found to reduce to a surprisingly simple form, provided that the scale of variation of the resistance is sufficiently large. The influence of a wall with toroidal gaps on tokamak plasma stability is investigated in some detail. Under some circumstances, kink modes are found to ``explode'' through the gaps with ideal growth rates. A similar investigation is made for a modular wall constructed of alternate thick and thin sections. Physics of Plasmas is copyrighted by The American Institute of Physics.
History: Received 22 February 1994; accepted 12 May 1994
Permalink: http://link.aip.org/link/?PHPAEN/1/2931/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.35.Py
    The physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Plasma macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, RayleighTaylor)
  • 52.55.Fa
    The physics of plasmas and electric discharges Plasma equilibrium and confinement Tokamaks
  • 52.40.Hf
    The physics of plasmas and electric discharges Plasma interactions Solidplasma interactions; wall effects; probes; sheaths
  • 52.30.Jb
    The physics of plasmas and electric discharges Plasma flow; magnetohydrodynamics Resistive MHD effects
  • YEAR: 1994

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ISSN:
1070-664X (print)   1089-7674 (online)
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REFERENCES (33)
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