近磁尾中超细电子流片的数值模拟

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, FLUIDS & PLASMAS
O. V. Mingalev, P. V. Setsko, M. N. Melnik, I. V. Mingalev, Kh. V. Malova, E. E. Grigorenko, L. M. Zelenyi
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引用次数: 0

摘要

本文描述了具有给定磁场法向分量的电流片的准稳态结构的数值模拟,该电流片由薄离子电流片及其嵌入的超薄电子电流片组成。这些薄片是MMS卫星任务在地球近磁尾的中性薄片上在磁层亚暴的风暴前阶段定期观测到的。本文提出了一种新的稳态电流片的数值模型,该模型具有瞬态离子居群和形成电流片的电子的动力学描述,在考虑电子实际电荷质量比的情况下,采用稳态情况下的特征法求解了Vlasov方程,并在速度空间的规则网格上计算了分布函数。利用该模型得到了超薄电流片的平面对称构型,并与MMS卫星观测结果进行了定性和定量分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical Simulation of the Super Fine Electron Current Sheet in the Near Magnetotail

Numerical Simulation of the Super Fine Electron Current Sheet in the Near Magnetotail

Numerical Simulation of the Super Fine Electron Current Sheet in the Near Magnetotail

The paper describes the numerical simulation of quasi-stationary configurations of current sheets with a given normal component of the magnetic-field, which consists of a thin ion current sheet and its embedded super thin electron current sheet. These sheets were regularly observed during the pre-storm phase of magnetospheric substorms by the MMS satellite mission in the neutral sheet of the near magnetotail of the Earth. A new numerical model is proposed of a stationary current sheet with kinetic description of transient ion populations and electrons forming it, for which the Vlasov equations are solved by the method of characteristics for stationary case and the distribution functions are calculated on regular grids in velocity space, the real charge-to-mass ratio for electrons being taken into account. This model was used to obtain planar symmetric configurations of the super thin current sheet, which agree qualitatively and quantitatively with MMS spacecraft observations.

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来源期刊
Plasma Physics Reports
Plasma Physics Reports 物理-物理:流体与等离子体
CiteScore
1.90
自引率
36.40%
发文量
104
审稿时长
4-8 weeks
期刊介绍: Plasma Physics Reports is a peer reviewed journal devoted to plasma physics. The journal covers the following topics: high-temperature plasma physics related to the problem of controlled nuclear fusion based on magnetic and inertial confinement; physics of cosmic plasma, including magnetosphere plasma, sun and stellar plasma, etc.; gas discharge plasma and plasma generated by laser and particle beams. The journal also publishes papers on such related topics as plasma electronics, generation of radiation in plasma, and plasma diagnostics. As well as other original communications, the journal publishes topical reviews and conference proceedings.
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