Control of parallel and perpendicular flow shears and related low-frequency plasma instabilities

被引:0
作者
Kaneko, T [1 ]
Tada, E [1 ]
Tsunoyama, H [1 ]
Hatakeyama, R [1 ]
机构
[1] Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan
来源
PLASMA PHYSICS | 2003年 / 669卷
关键词
D O I
暂无
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 two plasma sources using a concentrically three-segmented plasma (ion) emitter are developed, with which the parallel and perpendicular flow shears can be controlled, respectively. In the case of parallel flow-shear experiments, the drift-like, ion-acoustic-like, Kelvin-Helmholtz, and their coupled instabilities are found to be excited by the parallel flow shear. In the case of perpendicular flow-shear experiments, on the other hand, the drift-like instability which exists in the edge (density-gradient) region is suppressed by the perpendicular flow shear in the central region. These results show the importance of combined effects of radial density gradient and parallel/perpendicular flow shears on the low-frequency instabilities in magnetized plasmas.
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页码:416 / 419
页数:4
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