ON THE STABILITY OF SHEAR-ALFVEN VORTICES

被引：8

作者：

JOVANOVIC, D ^{[1
]}

HORTON, W ^{[1
]}

机构：

[1] UNIV TEXAS, INST FUS STUDIES, AUSTIN, TX 78712 USA

来源：

PHYSICS OF PLASMAS | 1994年 / 1卷 / 08期

关键词：

D O I：

10.1063/1.870588

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：

Linear stability of shear-Alfven vortices is studied analytically, using the Lyapunov method. Vortices belonging to the drift mode, which is a generalization of the standard Hasegawa-Mima vortex to the case of large parallel phase velocities, are proved to be unstable. In the case of the convective-cell mode, short perpendicular-wavelength perturbations are stable for a broad class of vortices. Eventually, instability of convective-cell vortices may occur on the perpendicular scale comparable with the vortex size, but it is followed by a simultaneous excitation of coherent structures with a better localization than the original vortex.

引用

页码：2614 / 2622

页数：9

共 24 条

[1]

ANTONOVA RA, 1983, JETP LETT+, V37, P651

[2] THEORY OF SHEAR ALFVEN VORTEX IN CURRENT-CARRYING PLASMA [J].