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Title: Analytical theory of the shear Alfvén continuum in the presence of a magnetic island

The effect of a magnetic island chain on the shear Alfvén continuum is calculated analytically. Using a WKB approximation of the linearized ideal MHD equations, the island is shown to cause an upshift in the continuum accumulation point frequency. This minimum of the frequency spectrum is shifted from the rational surface to the island separatrix. The structure of the eigenmodes is also presented.
Authors:
;  [1]
  1. Departments of Physics and Engineering Physics, University of Wisconsin-Madison, Madison, WI 53706 (United States)
Publication Date:
OSTI Identifier:
22408325
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 4; 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; ALFVEN WAVES; ANALYTICAL SOLUTION; MAGNETIC ISLANDS; MAGNETOHYDRODYNAMICS; MODE RATIONAL SURFACES; SHEAR; SPECTRA; WKB APPROXIMATION