Velocity shear instabilities in the multicomponent plasma sheet region
文献类型：期刊论文
| 作者 | Lu L(路立) ; Liu ZX(刘振兴) ; Li, Z. Y. |
| 刊名 | Physics of Plasmas
 |
| 出版日期 | 2000 |
| 卷号 | 7期号:3页码:1014-1019 |
| 关键词 | o+ ions ionospheric oxygen cdaw-6 event march 22 magnetotail density |
| ISSN号 | 1070-664X |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | In the presence of ionospheric O+ ions, the velocity shear instability of ultralow frequency surface wave in the plasma sheet is investigated. By considering protons and O+ ions flow in the same macrospeed and keeping the velocity curl term in the magnetohydrodynamic equations, the general dispersion relation of surface wave perturbation was obtained. It is found that the velocity shear instability tends to happen in a range of wavelengths around a certain point, which was called the resonant point. At the resonant point, even in absence of velocity shear, the damping eigen-oscillations, which are caused by the dissipation, as well as the inhomogeneities of magnetic field and plasma density, coupled with the disturbed Alfven wave and fed the energy into the disturbed wave through Alfven resonance. The velocity shear makes the range of unstable wavelengths enlarge around the resonant point and even enhanced the coupling at the short wavelength side of the resonant point. The presence of ionospheric O+ ions could obviously enhance the coupling. These results may be helpful in understanding magnetic pulsation (Pc5) and vertical plasma cooling in the plasma sheet, as well as substorm processes. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/992]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Lu L,Liu ZX,Li, Z. Y.. Velocity shear instabilities in the multicomponent plasma sheet region[J]. Physics of Plasmas,2000,7(3):1014-1019. |
| APA | 路立,刘振兴,&Li, Z. Y..(2000).Velocity shear instabilities in the multicomponent plasma sheet region.Physics of Plasmas,7(3),1014-1019. |
| MLA | 路立,et al."Velocity shear instabilities in the multicomponent plasma sheet region".Physics of Plasmas 7.3(2000):1014-1019. |
入库方式： OAI收割
来源：国家空间科学中心
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