Ion phase space vortices in 3 spatial dimensions
Ion phase space vortices in 3 spatial dimensions
复制标题
3 个空间维度的离子相空间涡旋
DOI：
10.1209/epl/i2001-00290-6
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发表时间：
2001
期刊：
影响因子：
1.8
通讯作者：
J. Trulsen
中科院分区：
文献类型：
--
作者：
L. Daldorff;Patrick Guio;S. Børve;H. Pécseli;J. Trulsen
用三维数值模拟方法观察了孤立离子相空间涡旋的形成和传播。代码允许外部施加恒定磁场。假设电子在任何时候都是等温和玻尔兹曼分布的，这意味着泊松方程在目前的问题中是非线性的。离子相空间涡是由离子-离子两流不稳定性的非线性饱和形成的，在边界处注入离子束或短离子爆发激发。我们考虑了有限光束直径和外加磁场强度的影响。
The formation and propagation of isolated ion phase space vortices are observed in a 3-dimensional numerical simulation. The code allows for an externally applied constant magnetic field. The electrons are assumed to be isothermal and Boltzmann distributed at all times, implying that Poisson's equation becomes nonlinear for the present problem. Ion phase space vortices are formed by the nonlinear saturation of the ion-ion two-stream instability, excited by injecting an ion beam or short ion-bursts at the boundary. We consider the effects of finite beam diameters and the intensity of an externally imposed magnetic field.