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题名: On nonlinear decay of kinetic Alfven waves and application to some processes in space plasmas
作者: Zhao, J. S.1, 3; Wu, D. J.1; Lu, J. Y.2
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期: 2010-12-11
卷号: 115, 页码:A12227   
关键词: FIELD LINE RESONANCES ; ELECTRON ACCELERATION ; PARAMETRIC-EXCITATION ; WHISTLER WAVES ; MAGNETIZED PLASMA ; HEAVY-IONS ; MAGNETOSPHERE ; DENSITY ; TURBULENCE ; AURORA
学科分类: Astronomy & Astrophysics
DOI: 10.1029/2010JA015630
文章类型: Article
中文摘要: 摘要description
英文摘要: This paper considers the nonlinear decay of the kinetic Alfven waves (KAW) in the space plasmas. By using a two-fluid model, we obtain a nonlinear equation to investigate the resonant interaction among three kinetic Alfven waves. It is shown that the parametric instability of the kinetic Alfven wave becomes important when its perpendicular wavelength is the order of the ion acoustic gyroradius or the electron inertial length. We give a detailed discussion for the KAW decay in the plasma inertial range and show that (1) the reverse decay of the kinetic Alfven wave is stronger than its parallel decay for the arbitrary wavelength range; (2) the reverse decay is lager than the parallel decay for small angles of two perpendicular wave vectors of the decay waves, and these two decays are zero for large angles; (3) both growth rates depend on the choice of the wave number range of the decay waves; and (4) there exists two forbidden regions for the KAW decay. In this paper, we also discuss the nonlinear decay of the kinetic Alfven waves in the auroral zone and show that the parametric instability can occur there and may play an important role in forming two reverse electron streaming fluxes in the electron acceleration region.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: FIELD LINE RESONANCES ; ELECTRON ACCELERATION ; PARAMETRIC-EXCITATION ; WHISTLER WAVES ; MAGNETIZED PLASMA ; HEAVY-IONS ; MAGNETOSPHERE ; DENSITY ; TURBULENCE ; AURORA
收录类别: SCI
语种: 英语
WOS记录号: WOS:000285256600002
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/1089
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.China Meteorol Adm, Natl Ctr Space Weather, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China

Recommended Citation:
Zhao J. S.; Wu D. J.; Lu J. Y..On nonlinear decay of kinetic Alfven waves and application to some processes in space plasmas ,JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS  ,2010,115():A12227   
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文件名: 2010001On nonlinear decay of kinetic Alfvén waves and application to some processes in space plasmas.pdf
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