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Title: Plasma current resonance in asymmetric toroidal systems

The well-known singularity in the magnetic differential equation for plasma current in an asymmetric toroidal confinement system is resolved by including in the pressure tensor corrections stemming from finite Larmor radius. The result provides an estimate of the amplitude of spikes in the parallel current that occur on rational magnetic surfaces. Resolution of the singularity is shown to depend on both the ambipolarity condition—the requirement of zero surface-averaged radial current—and the form of the magnetic differential equation near the rational surface.
Authors:
 [1] ;  [2]
  1. Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)
  2. Plasma Science and Fusion Center, Massachusetts Institute of Technology, 167 Albany Street, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
22490169
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; ASYMMETRY; CORRECTIONS; DIFFERENTIAL EQUATIONS; ELECTRIC CURRENTS; LARMOR RADIUS; MODE RATIONAL SURFACES; PLASMA CONFINEMENT; RESONANCE; SINGULARITY; TENSORS; TOROIDAL CONFIGURATION