Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves

doi:10.1063/1.4914852

CORC > 北京大学 > 地球与空间科学学院

	Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves
	Li, Jinxing ; Bortnik, Jacob ; Xie, Lun ; Pu, Zuyin ; Chen, Lunjin ; Ni, Binbin ; Tao, Xin ; Thorne, Richard M. ; Fu, Suiyan ; Yao, Zhonghua ; Guo, Ruilong
刊名	等离子体物理学
	2015
DOI	10.1063/1.4914852
英文摘要	Test particle simulation is a useful method for studying both linear and nonlinear wave-particle interactions in the magnetosphere. The gyro-averaged equations of particle motion for first-order and other cyclotron harmonic resonances with oblique whistler-mode waves were first derived by Bell [J. Geophys. Res. 89, 905 (1984)] and the most recent relativistic form was given by Ginet and Albert [Phys. Fluids B 3, 2994 (1991)], and Bortnik [Ph.D. thesis (Stanford University, 2004), p. 40]. However, recently we found there was a (- 1) l - 1 term difference between their formulas of perpendicular motion for the lth-order resonance. This article presents the detailed derivation process of the generalized resonance formulas, and suggests a check of the signs for self-consistency, which is independent of the choice of conventions, that is, the energy variation equation resulting from the momentum equations should not contain any wave magnetic components, simply because the magnetic field does not contribute to changes of particle energy. In addition, we show that the wave centripetal force, which was considered small and was neglect in previous studies of nonlinear interactions, has a profound time derivative and can significantly enhance electron phase trapping especially in high frequency waves. This force can also bounce the low pitch angle particles out of the loss cone. We justify both the sign problem and the missing wave centripetal force by demonstrating wave-particle interaction examples, and comparing the gyro-averaged particle motion to the full particle motion under the Lorentz force. ? 2015 AIP Publishing LLC.; SCI(E); EI; 0; ARTICLE; lijx@pku.edu.cn; xielun@pku.edu.cn; 5; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/328273]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Li, Jinxing,Bortnik, Jacob,Xie, Lun,et al. Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves[J]. 等离子体物理学,2015.
APA	Li, Jinxing.,Bortnik, Jacob.,Xie, Lun.,Pu, Zuyin.,Chen, Lunjin.,...&Guo, Ruilong.(2015).Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves.等离子体物理学.
MLA	Li, Jinxing,et al."Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves".等离子体物理学 (2015).