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Saturation level of Alfven waves driven by Kelvin-Helmholtz instability

文献类型：期刊论文

作者Chen, Ling1,2; Wu, Dejin1; Zhao, Guoqing1,3; Huang, Jing2
刊名CHINESE SCIENCE BULLETIN
出版日期2014-10-01
卷号59期号:28页码:3536-3542
关键词MHD Plasmas Sun: atmosphere Instability Waves
ISSN号1001-6538
英文摘要Alfv,n waves (AWs) can play an important role in the macroscopic dynamics as well as in the microscopic wave-particle interaction in various magneto-plasma environments. A very wide observed range of the relative amplitude of magnetic fluctuations of AWs from lower than 10(-3) in the terrestrial magnetosphere up to similar to 1 in the solar wind implies the complexity of saturation mechanisms of AWs. Taking account of the ion-neutral collision damping in a partially ionized plasma, the saturation level of AWs driven by the Kelvin-Helmholtz (K-H) instability is investigated in this paper. The intensified magnetic field due to the excited AWs may result in the saturation of the excited AWs when the growth rate is balanced by the damping rate. An equation determining the saturation level of the AWs is obtained. The results show that, for a fixed-frequency wave, the saturation level of the AWs considerably increases as the ionization degree increases as well as the sheared-flow velocity. On the other hand, for a fixed ionization degree the saturation level of the AWs slightly increases as the plasma beta increases but decreases as the wave frequency increases. These results have potential importance for us to estimate the saturation level of AWs in space and astrophysical plasmas.
WOS标题词Science & Technology
类目[WOS]Multidisciplinary Sciences
研究领域[WOS]Science & Technology - Other Topics
关键词[WOS]MULTICOMPONENT SOLAR-WIND ; FIELD-ALIGNED CURRENTS ; DIFFERENTIAL ION FLOW ; MAGNETOHYDRODYNAMIC WAVES ; CORONAL HOLES ; MHD WAVES ; PLASMA ; CONSEQUENCES ; DISSIPATION ; PROPAGATION
收录类别SCI
原文出处10.1007/s11434-014-0421-4
语种英语
WOS记录号WOS:000341837300004
公开日期2014-11-20
源URL[http://libir.pmo.ac.cn/handle/332002/10637]  
专题紫金山天文台_太阳和太阳系等离子体研究团组
作者单位1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Ling,Wu, Dejin,Zhao, Guoqing,et al. Saturation level of Alfven waves driven by Kelvin-Helmholtz instability[J]. CHINESE SCIENCE BULLETIN,2014,59(28):3536-3542.
APA Chen, Ling,Wu, Dejin,Zhao, Guoqing,&Huang, Jing.(2014).Saturation level of Alfven waves driven by Kelvin-Helmholtz instability.CHINESE SCIENCE BULLETIN,59(28),3536-3542.
MLA Chen, Ling,et al."Saturation level of Alfven waves driven by Kelvin-Helmholtz instability".CHINESE SCIENCE BULLETIN 59.28(2014):3536-3542.

入库方式： OAI收割

来源：紫金山天文台

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