Effect of the relative flow velocity on the structure and stability of the magnetopause current layer
Effect of the relative flow velocity on the structure and stability of the magnetopause current layer
复制标题
相对流速对磁层顶电流层结构和稳定性的影响
DOI：
10.1029/93ja02358
复制
发表时间：
1994
影响因子：
--
通讯作者：
M. Ashour‐Abdalla
中科院分区：
文献类型：
--
作者：
M. Kuznetsova;M. Roth;Z. Wang;M. Ashour‐Abdalla
用Vlasov动力学方法研究了切变速度和切变磁场同时存在时磁层顶电流层的稳定性。提出了一个修正的Harris-Sester o平衡，即磁场和体积速度在同一空间尺度上改变方向，以解释MCL中心磁场的y分量的产生。在此平衡下，当剪切流(U)趋于离子漂移速度(Ud)时，By(0)可以达到Bz(∞)量级。剪切流引入的初始对称Harris位形的修正对等离子体与低频撕裂型电磁微扰的绝热相互作用以及MCL中心附近粒子的非绝热响应有很大影响。这导致撕裂模式的生长速度降低。
The Vlasov kinetic approach is used to study the stability of the magnetopause current layer (MCL) when a sheared flow velocity and a sheared magnetic field both exist simultaneously within it. A modified Harris-Sestero equilibrium where the magnetic field and bulk velocity are changing direction on the same spatial scale is suggested to illustrate the generation of a y component of the magnetic field in the center of the MCL. With this equilibrium it is shown that By(0) can be of the order of Bz(∞) when the value of the shear flow (U) tends to the ion drift velocity (Ud). The modifications of the initial symmetrical Harris configuration, introduced by the presence of a shear flow, strongly influence the adiabatic interaction of the plasma with low-frequency tearing-type electromagnetic perturbations as well as the nonadiabatic response of the particles near the center of the MCL. This results in a reduction of the growth rate of the tearing mode.
DOI：
10.1145/1874391.187410
发表时间：
1987-02
期刊：
ACM SIGSOFT Softw. Eng. Notes
影响因子：
--
作者：
Will Tribbey
通讯作者：
Will Tribbey