EFFECTS OF NET TOROIDAL CURRENT ON THE MERCIER CRITERION IN THE LARGE HELICAL DEVICE

被引：52
|
作者：
ICHIGUCHI, K [1 ]
NAKAJIMA, N [1 ]
OKAMOTO, M [1 ]
NAKAMURA, Y [1 ]
WAKATANI, M [1 ]
机构：
[1] KYOTO UNIV,PLASMA PHYS LAB,UJI,KYOTO 611,JAPAN
来源：
NUCLEAR FUSION | 1993年 / 33卷 / 03期
关键词：
D O I：
10.1088/0029-5515/33/3/I10
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 effects of the net toroidal current on the local ideal MHD stability or the Mercier criterion are investigated for a plasma in the heliotron/torsatron configuration by taking the Large Helical Device as an example. The three dimensional equilibrium code VMEC is used to study the local stability of equilibria with given net toroidal currents. It is found that a subtractive current that decreases the rotational transform improves the stability, while an additive current that increases the rotational transform reduces the stability. The change of the rotational transform at the magnetic axis due to the net toroidal current is the essential mechanism for the change of stability. Mercier stability diagrams are given for the configurations of the Large Helical Device in which the plasma position is shifted inward or outward.
引用
收藏
页码：481 / 492
页数：12
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