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

被引：58

作者：

Fitzpatrick, R. ^{[1
]}

Waelbroeck, F. L. ^{[1
]}

Militello, F. ^{[1
]}

机构：

[1] Univ Texas, Inst Fus Studies, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICS OF PLASMAS | 2006年 / 13卷 / 12期

关键词：

D O I：

10.1063/1.2402914

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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. (c) 2006 American Institute of Physics.

引用

页数：9

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