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Interaction of scrape-off layer currents with magnetohydrodynamical instabilities in tokamak plasmas

Phys. Plasmas 14, 062505 (2007); doi:10.1063/1.2747624

Published 28 June 2007

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Richard Fitzpatrick
Institute for Fusion Studies, Department of Physics, University of Texas at Austin, Austin, Texas 78712
A simple theoretical model is developed which describes how current eddies are excited in the scrape-off layer (SOL) of a large-aspect-ratio, low-beta, circular cross-section tokamak by time-varying magnetohydrodynamical instabilities originating from within the plasma. This model is used to study the interaction of SOL currents with tearing modes and resistive wall modes in a typical tokamak plasma. SOL currents are found to be fairly effective at braking the rotation of tearing modes, and to have a significant destabilizing effect on resistive wall modes. ©2007 American Institute of Physics
History: Received 9 January 2007; accepted 17 May 2007; published 28 June 2007
Permalink: http://link.aip.org/link/?PHPAEN/14/062505/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.40.Hf
    Plasma–material interactions; boundary layer effects
  • 52.25.Fi
    Plasma transport properties
  • 52.30.Cv
    Plasma magnetohydrodynamics including electron magnetohydrodynamics
  • 52.35.Py
    Plasma macroinstabilities (hydromagnetic) e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor instabilities, etc
  • 52.55.Fa
    Tokamaks
  • YEAR: 2007

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PUBLICATION DATA

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