Relativistic electron dynamics produced by azimuthally localized   poloidalmode ULF waves: Boomerang-shaped pitch angle evolutions

doi:10.1002/2017GL074006

CORC > 北京大学 > 地球与空间科学学院

	Relativistic electron dynamics produced by azimuthally localized poloidalmode ULF waves: Boomerang-shaped pitch angle evolutions
	Hao, Y. X. ; Zong, Q.G. ; Zhou, X.Z. ; Rankin, R. ; Chen, X. R. ; Liu, Y. ; Fu, S. Y. ; Spence, H. E. ; Blake, J. B. ; Reeves, G. D.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2017
关键词	CHARGED-PARTICLE BEHAVIOR ALLEN PROBES OBSERVATIONS FREQUENCY GEOMAGNETIC-PULSATIONS FIELD
DOI	10.1002/2017GL074006
英文摘要	We present an analysis of "boomerang-shaped" pitch angle evolutions of outer radiation belt relativistic electrons observed by the Van Allen Probes after the passage of an interplanetary shock on 7 June 2014. The flux at different pitch angles is modulated by Pc5 waves, with equatorially mirroring electrons reaching the satellite first. For 90 degrees pitch angle electrons, the phase change of the flux modulations across energy exceeds 180 degrees and increasingly tilts with time. Using estimates of the arrival time of particles of different pitch angles at the spacecraft location, a scenario is investigated in which shock-induced ULF waves interact with electrons through the drift resonance mechanism in a localized region westward of the spacecraft. Numerical calculations on particle energy gain with the modified ULF wavefield reproduce the observed boomerang stripes and modulations in the electron energy spectrogram. The study of boomerang stripes and their relationship to drift resonance taking place at a location different from the observation point adds new understanding of the processes controlling the dynamics of the outer radiation belt.; National Natural Science Foundation of China [41421003]; Major Project of Chinese National Programs for Fundamental Research and Development [2012CB825603]; Canadian Space Agency; National Science and Engineering Research Council of Canada; SCI(E); ARTICLE; 15; 7618-7627; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471445]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Hao, Y. X.,Zong, Q.G.,Zhou, X.Z.,et al. Relativistic electron dynamics produced by azimuthally localized poloidalmode ULF waves: Boomerang-shaped pitch angle evolutions[J]. GEOPHYSICAL RESEARCH LETTERS,2017.
APA	Hao, Y. X..,Zong, Q.G..,Zhou, X.Z..,Rankin, R..,Chen, X. R..,...&Reeves, G. D..(2017).Relativistic electron dynamics produced by azimuthally localized poloidalmode ULF waves: Boomerang-shaped pitch angle evolutions.GEOPHYSICAL RESEARCH LETTERS.
MLA	Hao, Y. X.,et al."Relativistic electron dynamics produced by azimuthally localized poloidalmode ULF waves: Boomerang-shaped pitch angle evolutions".GEOPHYSICAL RESEARCH LETTERS (2017).