A SIMPLE-MODEL FOR DRIVEN ISLANDS IN TOKAMAKS

被引:41
作者
JENSEN, TH
LEONARD, AW
HYATT, AW
机构
[1] General Atomics, San Diego
来源
PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1993年 / 5卷 / 04期
关键词
D O I
10.1063/1.860913
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 problem modeled is that of a surface of magnetic islands, which, because of flow of plasma relative to the islands, is exposed to a viscous force. Such a model is needed for describing the effects of error fields on a rotating plasma or to describe the effects of deliberately imposed, moving island surfaces on the plasma. The latter may be a useful tool to establish desirable rotation velocity profiles in tokamak plasmas, possibly resulting in better confinement. The model described is simple in that results may be obtained analytically and comprehensive in that it can account both for ''locking'' circumstances, under which plasma inside islands is almost at rest in the island frame, and ''slipping'' circumstances under which plasma slips rapidly in and out of islands. It can also account for discontinuous transitions between ''locking'' and ''slipping'' circumstances.
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页码:1239 / 1247
页数:9
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