Imprints of impulse-excited hydromagnetic waves on electrons in the Van   Allen radiation belts

doi:10.1002/2015GL064988

CORC > 北京大学 > 地球与空间科学学院

	Imprints of impulse-excited hydromagnetic waves on electrons in the Van Allen radiation belts
	Zhou, Xu-Zhi ; Wang, Zi-Han ; Zong, Qiu-Gang ; Claudepierre, Seth G. ; Mann, Ian R. ; Kivelson, Margaret G. ; Angelopoulos, Vassilis ; Hao, Yi-Xin ; Wang, Yong-Fu ; Pu, Zu-Yin
刊名	GEOPHYSICAL RESEARCH LETTERS
	2015
关键词	ULF waves drift resonance radiation belt wave-particle interaction wave growth Van Allen Probes FREQUENCY GEOMAGNETIC-PULSATIONS CHARGED-PARTICLE BEHAVIOR FIELD LINE RESONANCES ALFVEN WAVES ULF WAVES MAGNETOSPHERE ENHANCEMENTS EXCITATION
DOI	10.1002/2015GL064988
英文摘要	Ultralow frequency electromagnetic oscillations, interpreted as standing hydromagnetic waves in the magnetosphere, are a major energy source that accelerates electrons to relativistic energies in the Van Allen radiation belt. Electrons can rapidly gain energy from the waves when they resonate via a process called drift resonance, which is observationally characterized by energy-dependent phase differences between electron flux and electromagnetic oscillations. Such dependence has been recently observed and interpreted as spacecraft identifications of drift resonance electron acceleration. Here we show that in the initial wave cycles, the observed phase relationship differs from that characteristic of well-developed drift resonance. We further examine the differences and find that they are imprints of impulse-excited, coupled fast-Alfven waves before they transform into more typical standing waves. Our identification of such imprints provides a new understanding of how energy couples in the inner magnetosphere, and a new diagnostic for the generation and growth of magnetospheric hydromagnetic pulsations.; NSFC [41421003, 41474140]; SCI(E); EI; ARTICLE; xuzhi.zhou@gmail.com; 15; 6199-6204; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417176]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhou, Xu-Zhi,Wang, Zi-Han,Zong, Qiu-Gang,et al. Imprints of impulse-excited hydromagnetic waves on electrons in the Van Allen radiation belts[J]. GEOPHYSICAL RESEARCH LETTERS,2015.
APA	Zhou, Xu-Zhi.,Wang, Zi-Han.,Zong, Qiu-Gang.,Claudepierre, Seth G..,Mann, Ian R..,...&Pu, Zu-Yin.(2015).Imprints of impulse-excited hydromagnetic waves on electrons in the Van Allen radiation belts.GEOPHYSICAL RESEARCH LETTERS.
MLA	Zhou, Xu-Zhi,et al."Imprints of impulse-excited hydromagnetic waves on electrons in the Van Allen radiation belts".GEOPHYSICAL RESEARCH LETTERS (2015).