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

被引：20
|
作者：
Fitzpatrick, Richard [1 ]
机构：
[1] Univ Texas, Inst Fus Studies, Dept Phys, Austin, TX 78712 USA
来源：
PHYSICS OF PLASMAS | 2007年 / 14卷 / 06期
关键词：
D O I：
10.1063/1.2747624
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：
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. (c) 2007 American Institute of Physics.
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页数：8
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