Compressional ULF wave modulation of energetic particles in the inner   magnetosphere

doi:10.1002/2016JA022706

CORC > 北京大学 > 地球与空间科学学院

	Compressional ULF wave modulation of energetic particles in the inner magnetosphere
	Liu, H. ; Zong, Q.G. ; Zhou, X.Z. ; Fu, S. Y. ; Rankin, R. ; Wang, L.H. ; Yuan, C. J. ; Wang, Y. F. ; Baker, D. N. ; Blake, J. B. ; Kletzing, C. A.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2016
关键词	magnetosphere energetic particles relativistic electrons compressional ULF wave modulation mirror effect FREQUENCY GEOMAGNETIC-PULSATIONS DRIFT MIRROR INSTABILITY PC-5 ELECTRONS MECHANISM BEHAVIOR STORM
DOI	10.1002/2016JA022706
英文摘要	We present Van Allen Probes observations of modulations in the flux of very energetic electrons up to a few MeV and protons between 1200 and 1400UT on 19 February 2014. During this event the spacecraft were in the dayside magnetosphere at L approximate to 5.5. The modulations extended across a wide range of particle energies, from 79.80keV to 2.85MeV for electrons and from 82.85keV to 636.18keV for protons. The fluxes of /2 pitch angle particles were observed to attain maximum values simultaneously with the ULF compressional magnetic field component reaching a minimum. We use peak-to-valley ratios to quantify the strength of the modulation effect, finding that the modulation is larger at higher energies than at lower energies. It is shown that the compressional wave modulation of the particle distribution is due to the mirror effect, which can trap relativistic electrons efficiently for energies up to 2.85MeV and trap protons up to approximate to 600keV. Larger peak-to-valley ratios at higher energies also attributed to the mirror effect. Finally, we suggest that protons with energies higher than 636.18keV cannot be trapped by the compressional ULF wave efficiently due to the finite Larmor radius effect.; National Natural Science Foundation of China [41421003]; Major Project of Chinese National Programs for Fundamental Research and Development [2012CB825603]; NSERC; Canadian Space Agency; SCI(E); ARTICLE; qgzong@pku.edu.cn; 7; 6262-6276; 121
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/456986]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Liu, H.,Zong, Q.G.,Zhou, X.Z.,et al. Compressional ULF wave modulation of energetic particles in the inner magnetosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016.
APA	Liu, H..,Zong, Q.G..,Zhou, X.Z..,Fu, S. Y..,Rankin, R..,...&Kletzing, C. A..(2016).Compressional ULF wave modulation of energetic particles in the inner magnetosphere.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS.
MLA	Liu, H.,et al."Compressional ULF wave modulation of energetic particles in the inner magnetosphere".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS (2016).