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Current Density and Plasma Displacement Near Perturbed Rational Surface
[摘要] The current density in the vicinity of a rational surface of a force-free magnetic field subjected to an ideal perturbation is shown to be the sum of both a smooth and a delta-function distribution, which give comparable currents. The maximum perturbation to the smooth current density is comparable to a typical equilibrium current density and the width of the layer in which the current flows is shown to be proportional to the perturbation amplitude. In the standard linearized theory, the plasma displacement has an unphysical jump across the rational surface, but the full theory gives a continuous displacement.
[发布日期] 2010-10-10 [发布机构] 
[效力级别]  [学科分类] 原子、分子光学和等离子物理
[关键词] CURRENT DENSITY;DELTA FUNCTION;DISTRIBUTION;FORCE-FREE MAGNETIC FIELDS;MODE RATIONAL SURFACES;PLASMA Equilibrium;MHD - Toroidal;Magnetic Surfaces;Magnetic Islands [时效性] 
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