Bernstein‐Greene‐Kruskal analysis of electrostatic solitary waves observed with Geotail
Bernstein‐Greene‐Kruskal analysis of electrostatic solitary waves observed with Geotail
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使用 Geotail 观测到的静电孤立波的 Bernstein-Greene-Kruskal 分析
DOI：
10.1029/97ja02033
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发表时间：
1997
影响因子：
--
通讯作者：
Y. Omura
中科院分区：
文献类型：
--
作者：
V. L. Krasovsky;H. Matsumoto;Y. Omura
分析了Geotail探测器在磁尾观测到的宽带静电噪声谱高频分量中的静电孤立波。本文基于Bernstein-Greene-Kruskal（BGK）方法，给出了作为Vlasov-Poisson方程定常解的ESW的一般描述。结果表明，局部扰动的结构和基本参数之间的关系主要是由共振和非共振等离子体屏蔽的聚束电子被捕获的潜在脉冲在等离子体中移动。发现了脉冲的典型宽度与其漂移速度和脉冲幅度的关系，这可以看作是局域扰动的非线性色散关系。理论结果与Geotail数据和粒子模拟进行了比较。
Electrostatic solitary waves (ESW) relevant to the high-frequency component of broadband electrostatic noise spectra observed by Geotail spacecraft in the magnetotail are analyzed. A general description of the ESW, as stationary solutions of Vlasov-Poisson equations, is developed on the basis of the Bernstein-Greene-Kruskal (BGK) technique. It is shown that the structure and relationships among basic parameters of a localized perturbation are primarily determined by resonant and nonresonant plasma screenings of bunched electrons trapped by a potential pulse moving in a plasma. The dependence of the typical width of the pulse on its drift velocity and pulse amplitude is found, which can be treated as a nonlinear dispersion relation for the localized perturbation. The theoretical results are compared with the Geotail data and a particle simulation.