A mechanism for the reconnecting m=2 N=1 instability in q>1 shearless equilibrium

被引：2

作者：

Edery, D

Morera, JP

Litaudon, X

Moreau, D

机构：

[1] Association Euratom-CEA sur la Fusion, Centre d'Etudes de Cadarache

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1996年 / 38卷 / 06期

关键词：

D O I：

10.1088/0741-3335/38/6/003

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 model for the ballooning mode destabilization in the presence of a sufficiently large island is developed. This model may explain the fast MHD activity (sawtooth-like) observed on Tore Supra during LH current drive in shearless equilibrium regimes with a safety factor on axis of just less than two. A simple analytical stability criterion is derived which indicates whenever an equilibrium is stable or unstable against the ballooning mode. The model is supported by Tore Supra experimental data and may also apply in other tokamaks exhibiting nearly Bat q-profiles.

引用

页码：803 / 810

页数：8