MAGNETIC SURFACE BREAKING IN 3-DIMENSIONAL L = 2 HELIOTRON TORSATRON EQUILIBRIA

被引:26
作者
HAYASHI, T
TAKEI, A
SATO, T
机构
[1] National Institute for Fusion Science
来源
PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1992年 / 4卷 / 06期
关键词
D O I
10.1063/1.860064
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
Magnetic surface breaking due to finite pressure effect is analyzed for three-dimensional magnetohydrodynamic equilibria of l = 2 heliotron/torsatron configuration. Characteristics of magnetic island formation are numerically studied in detail. Main results are as follows: (i) There exists a clear-cut boundary, which practically determines the position of the outermost closed surface. The boundary position shifts as beta increases, though not affected by the external axisymmetric fields. (ii) The clear-cut boundary is maintained for a higher beta plasma as the aspect ratio of the configuration increases. For a low aspect ratio configuration, however, high beta equilibria with clear surfaces can be obtained by controlling the external poloidal field, especially the vertical field. (iii) The external l = 1 field is particularly viable in controlling the breaking of magnetic surfaces.
引用
收藏
页码:1539 / 1546
页数:8
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