EDGE MICROTEARING AND DRIFT INSTABILITIES IN DIII-D TOKAMAK PLASMAS

被引：13
|
作者：
LAU, YT
机构：
[1] Laboratory for Plasma Research, University of Maryland, College Park, MD
来源：
NUCLEAR FUSION | 1990年 / 30卷 / 05期
关键词：
D O I：
10.1088/0029-5515/30/5/013
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：
Microtearing modes are shown to be more unstable for H-mode profiles than for L-mode profiles of plasma near the edge of DIII-D. This indicates that microtearing is not responsible for the L-H transition. This result is mainly attributed to the large H-mode density gradient which outweighs the stabilizing effect of magnetic shear. A similar result is obtained for drift instabilities, for which two modes are found near the edge. The characteristics of the microtearing modes and the experimentally observed quasicoherent fluctuations are very similar, suggesting that they are closely related. © 1990 IOP Publishing Ltd.
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收藏
页码：934 / 938
页数：5
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