中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Kinetic Alfven waves driven by velocity shear

文献类型:期刊论文

作者Wang, X. Y. ; Liu, Z. X. ; Li, Z. Y. ; Zhang, X. B.
刊名Physics of Plasmas
出版日期1998
卷号5期号:4页码:836-840
ISSN号1070-664X
关键词period magnetic pulsations excitation turbulence aurora
通讯作者北京8701信箱
英文摘要Considering the effect of the finite ion gyroradius, the kinetic Alfven wave in an anisotropic medium driven by a parallel velocity flow was investigated and the full dispersion relation was given. Zn deducing the dispersion relation, the coupling between electrostatic and electromagnetic oscillations, effects of the resonant electrons and the longitudinal motion of ions are considered. Based on the analytical and numerical calculations, two instability boundaries are found. They are 1<(k(perpendicular to)dV(0)/dx)/k(z) omega(ci)upsilon(A)(2)/(T-i/m(i)). Resonant electrons serve as the main energy source in these two regimes, while the ion longitudinal motion only suppresses the mode in the second regime. In the boundary layer of the magnetopause, the temperature anisotropy also modifies the instability by lowering the frequency and reducing the growth rate, The above results shaw that the low-frequency Alfven waves with the scale of perpendicular wavelengths greater than the ion gyroradius in the magnetopause can be efficiently driven by a velacity-sheared flow.
学科主题空间物理
收录类别SCI
原文出处://000073057600002
语种英语
源URL[http://ir.cssar.ac.cn/handle/122/983]  
专题国家空间科学中心_空间科学部
推荐引用方式
GB/T 7714
Wang, X. Y.,Liu, Z. X.,Li, Z. Y.,et al. Kinetic Alfven waves driven by velocity shear[J]. Physics of Plasmas,1998,5(4):836-840.
APA Wang, X. Y.,Liu, Z. X.,Li, Z. Y.,&Zhang, X. B..(1998).Kinetic Alfven waves driven by velocity shear.Physics of Plasmas,5(4),836-840.
MLA Wang, X. Y.,et al."Kinetic Alfven waves driven by velocity shear".Physics of Plasmas 5.4(1998):836-840.

入库方式: OAI收割

来源:国家空间科学中心

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