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.

引用

页码：416 / 419

页数：4

共 8 条

[1] Excitation of ion-acoustic-like waves by subcritical currents in a plasma having equal electron and ion temperatures
Agrimson, E
D'Angelo, N
Merlino, RL
[J]. PHYSICAL REVIEW LETTERS, 2001, 86 (23) : 5282 - 5285
[2] KELVIN-HELMHOLTZ INSTABILITY IN A FULLY IONIZED PLASMA IN A MAGNETIC FIELD
DANGELO, N
[J]. PHYSICS OF FLUIDS, 1965, 8 (09) : 1748 - &
[3] Origin of low-frequency oscillations in the ionosphere
Gavrishchaka, VV
Ganguli, SB
Ganguli, GI
[J]. PHYSICAL REVIEW LETTERS, 1998, 80 (04) : 728 - 731
[4] Experimental studies of the physical mechanism determining the radial electric field and its radial structure in a toroidal plasma
Ida, K
[J]. PLASMA PHYSICS AND CONTROLLED FUSION, 1998, 40 (08) : 1429 - 1488
[5] KANEKO T, 2001, ANN REPORT NAT I FUS, P225
[6] TADA E, 2001, J PLASMA FUSION RES, V4, P524
[7] Experimental verification of the shear-modified ion-acoustic instability
Teodorescu, C
Reynolds, EW
Koepke, ME
[J]. PHYSICAL REVIEW LETTERS, 2002, 88 (18) : 4
[8] Control of radial potential profile and related low-frequency fluctuations in an ECR-produced plasma
Yoshinuma, M
Inutake, M
Hatakeyama, R
Kaneko, T
Hattori, K
Ando, A
Sato, N
[J]. PHYSICS LETTERS A, 1999, 255 (4-6) : 301 - 306

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