Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight-to-Dawn Sector

doi:10.1029/2019GL085499

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DOI	10.1029/2019GL085499
	Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight-to-Dawn Sector
	Kasahara, S.1; Miyoshi, Y.2; Kurita, S.2; Yokota, S.3; Keika, K.1; Hori, T.2; Kasahara, Y.4; Matsuda, S.5; Kumamoto, A.6; Matsuoka, A.5; Seki, K.1; Shinohara, I 5
	2019-11-23
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:22 页码:12685-12692
文章类型	Article
语种	英语
国家	Japan
英文摘要	Drastic variations of radiation-belt/ring current electrons are the result of competing processes of acceleration, transport, and loss. For subrelativistic energetic electrons (10-100 keV), one of the promising loss mechanisms is precipitation into the atmosphere due to pitch angle scattering by whistler mode chorus waves. The efficiency of the scattering has yet to be quantified by direct observations, however. Using in situ measurements by the ERG (Arase) spacecraft in the midnight-to-dawn sector at and around the magnetic equator, we demonstrate that the full filling of energetic electron loss cones occurs commonly, associated with typical-amplitude (greater than 50 pT) chorus waves. The spatial distribution of the loss cone filling indicates that the efficient scattering is limited to \|MLAT\|< 10 degrees.
英文关键词	strong diffusion loss cone precipitation wave-particle interaction
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000498020600001
WOS关键词	PULSATING AURORA ; RADIATION BELT ; FINE-STRUCTURE ; SCATTERING ; STORM
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/225081
专题	环境与发展全球科技态势
作者单位	1.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo, Japan; 2.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan; 3.Osaka Univ, Grad Sch Sci, Toyonaka, Osaka, Japan; 4.Kanazawa Univ, Grad Sch Nat Sci & Technol, Kanazawa, Ishikawa, Japan; 5.JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan; 6.Tohoku Univ, Grad Sch Sci, Sendai, Miyagi, Japan
推荐引用方式 GB/T 7714	Kasahara, S.,Miyoshi, Y.,Kurita, S.,et al. Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight-to-Dawn Sector[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(22):12685-12692.
APA	Kasahara, S..,Miyoshi, Y..,Kurita, S..,Yokota, S..,Keika, K..,...&Shinohara, I.(2019).Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight-to-Dawn Sector.GEOPHYSICAL RESEARCH LETTERS,46(22),12685-12692.
MLA	Kasahara, S.,et al."Strong Diffusion of Energetic Electrons by Equatorial Chorus Waves in the Midnight-to-Dawn Sector".GEOPHYSICAL RESEARCH LETTERS 46.22(2019):12685-12692.