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Magnetohydrodynamic stabilization of an axisymmetric mirror plasma with a magnetic divertor is studied. An equation is found for the flute modes, which includes the stabilizing influence of ion temper...
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Isothermal tokamak
An isothermal tokamak, Isomak, is investigated to demonstrate that nearly exact, rigidly toroidally rotating Maxwellian solutions exist for both the ions and the electrons. For the ions this Maxwellia...

The influence of the ion polarization current on magnetic island stability in a tokamak plasma

Phys. Plasmas 13, 122507 (2006); doi:10.1063/1.2402914

Published 19 December 2006

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R. Fitzpatrick, F. L. Waelbroeck, and F. Militello
Institute for Fusion Studies, Department of Physics, University of Texas at Austin, Austin, Texas 78712
The influence of the ion polarization current on the stability of a constant-psi magnetic island in a tokamak plasma is investigated numerically using a reduced two-fluid model in two-dimensional slab geometry. The polarization current is found to be negligibly small when the island is either too narrow or too wide. However, under certain circumstances, there exists an intermediate regime in which the polarization current is appreciable, and has a stabilizing influence on the island. This effect may account for the metastable nature of neoclassical tearing modes in tokamak plasmas. ©2006 American Institute of Physics
History: Received 8 September 2006; accepted 8 November 2006; published 19 December 2006
Permalink: http://link.aip.org/link/?PHPAEN/13/122507/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.30.Ex
    Two-fluid and multi-fluid plasmas
  • 52.55.Tn
    Ideal and resistive plasma MHD modes; kinetic modes
  • YEAR: 2006

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