Energy filter effect for solar wind particle entry to the plasma sheet via flank regions during southward interplanetary magnetic field
文献类型：期刊论文
| 作者 | Zhou, X. Z. ; Pu, Z. Y. ; Zong, Q. G. ; Xie, L. |
| 刊名 | Journal of Geophysical Research-Space Physics
 |
| 出版日期 | 2007 |
| 卷号 | 112期号:A6页码:A06233 |
| 关键词 | kelvin-helmholtz instability tangential discontinuity geotail observations magnetosphere magnetopause magnetotail boundary model ions |
| ISSN号 | 0148-0227 |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | Several mechanisms have been used to explain solar wind plasma entry into the plasma sheet in the magnetotail. In this paper, we focus on the gradient drift entry (GDE) process in the equatorial flanks of the magnetosphere, based on the magnetopause picture of a tangential discontinuity with a small tangential electric field as was suggested by Alfven (1968). We discuss the GDE efficiency in different conditions using the adiabatic theory. It can be clearly shown that the GDE efficiency is much lower during southward interplanetary magnetic field (IMF), with a strong energy filter effect for incoming solar wind particles. Given a typical condition, a critical energy for particle entry is calculated to be several kiloelectron volts. Only those particles with higher energy can penetrate the magnetopause, a condition which can be also proved by test particle simulations. The lower efficiency than that during northward IMF during periods of southward IMF is in agreement with the different properties of the plasma sheet observed, i.e., hot and tenuous when the IMF is southward, cold and dense for northward IMF. |
| 收录类别 | SCI |
| 原文出处 | http://www.agu.org/pubs/crossref/2007/2006JA012180.shtml |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1688]  |
| 专题 | 国家空间科学中心_其他部室 |
| 推荐引用方式 GB/T 7714 | Zhou, X. Z.,Pu, Z. Y.,Zong, Q. G.,et al. Energy filter effect for solar wind particle entry to the plasma sheet via flank regions during southward interplanetary magnetic field[J]. Journal of Geophysical Research-Space Physics,2007,112(A6):A06233. |
| APA | Zhou, X. Z.,Pu, Z. Y.,Zong, Q. G.,&Xie, L..(2007).Energy filter effect for solar wind particle entry to the plasma sheet via flank regions during southward interplanetary magnetic field.Journal of Geophysical Research-Space Physics,112(A6),A06233. |
| MLA | Zhou, X. Z.,et al."Energy filter effect for solar wind particle entry to the plasma sheet via flank regions during southward interplanetary magnetic field".Journal of Geophysical Research-Space Physics 112.A6(2007):A06233. |
入库方式： OAI收割
来源：国家空间科学中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。