Kinetic Alfven turbulence below and above ion cyclotron frequency

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	Kinetic Alfven turbulence below and above ion cyclotron frequency
	Zhao, J. S.1,2; Voitenko, Y. M.3; Wu, D. J.1; Yu, M. Y.4,5,6
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2016
卷号	121 期号:1 页码:5-18
关键词	MHD turbulence Sun: corona solar wind
英文摘要	Alfvenic turbulent cascade perpendicular and parallel to the background magnetic field is studied accounting for anisotropic dispersive effects and turbulent intermittency. The perpendicular dispersion and intermittency make the perpendicular-wave-number magnetic spectra steeper and speed up production of high ion cyclotron frequencies by the turbulent cascade. On the contrary, the parallel dispersion makes the spectra flatter and decelerate the frequency cascade above the ion cyclotron frequency. Competition of these factors results in spectral indices distributed in the interval [-2, -3], where -2 is the index of high-frequency space-filling turbulence and -3 is the index of low-frequency intermittent turbulence formed by tube-like fluctuations. Spectra of fully intermittent turbulence fill a narrower range of spectral indices [-7/3, -3], which almost coincides with the range of indexes measured in the solar wind. This suggests that the kinetic-scale turbulent spectra are mainly shaped by the dispersion and intermittency. A small mismatch with measured indexes of about 0.1 can be associated with damping effects not studied here.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SOLAR-WIND TURBULENCE ; 1 AU ; PLASMA TURBULENCE ; ACCRETION FLOWS ; WAVES ; SCALES ; RANGE ; EXCITATION ; CLUSTER
收录类别	SCI
语种	英语
WOS记录号	WOS:000371146900001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16153]
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, Key Lab Planetary Sci, Nanjing, Jiangsu, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China 3.Belgian Inst Space Aeron, Space Phys Div, Solar Terr Ctr Excellence, Brussels, Belgium 4.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310003, Zhejiang, Peoples R China 5.Zhejiang Univ, Dept Phys, Hangzhou 310003, Zhejiang, Peoples R China 6.Ruhr Univ Bochum, Inst Theoret Phys 1, Univ Str 150, Bochum, Germany
推荐引用方式 GB/T 7714	Zhao, J. S.,Voitenko, Y. M.,Wu, D. J.,et al. Kinetic Alfven turbulence below and above ion cyclotron frequency[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016,121(1):5-18.
APA	Zhao, J. S.,Voitenko, Y. M.,Wu, D. J.,&Yu, M. Y..(2016).Kinetic Alfven turbulence below and above ion cyclotron frequency.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,121(1),5-18.
MLA	Zhao, J. S.,et al."Kinetic Alfven turbulence below and above ion cyclotron frequency".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 121.1(2016):5-18.