Solitons in a Convective Motion of a Low-β Plasma
Solitons in a Convective Motion of a Low-β Plasma
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低β等离子体对流运动中的孤子
DOI：
10.1143/jpsj.46.983
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发表时间：
1979
影响因子：
1.7
通讯作者：
Kunihiko Watanabe
中科院分区：
文献类型：
--
作者：
K. Nozaki;T. Taniuti;Kunihiko Watanabe
本文研究了在垂直于外加磁场的平面内，由小尺度对流胞组成的包络孤立涡作为非线性薛定谔方程的包络孤立子在低β的非均匀有界等离子体中传播。研究结果进一步表明，调制不稳定性在一定波数下共振增强，有质动力激发大尺度涡。讨论是基于长谷川和米马的模式方程，即地转涡旋方程，并指出了由Rossby波的纬向流的产生。
The present paper shows that in a plane normal to an applied magnetic field, envelope solitary vortices comprising convective cells of small scale propagate through a nonuniform bounded plasma of low β as envelope solitons of a nonlinear Schrodinger equation. It is shown further that the modulational instability is enhanced resonantly for certain wavenumbers and vortices of large scale is excited by the ponderomotive force. Discussions are based on the model equation of Hasegawa and Mima that is the geostrophic vortex equation, and a generation of zonal flows by the Rossby wave is noted.