期刊论文

Liu, Si;Xiao, Fuliang

英文

GEOPHYSICAL RESEARCH LETTERS

0094-8276

2020

47

16

e2020GL088421-null

10.1029/2020GL088421

This work is supported by the National Natural Science Foundation of China Grants 41531072, 41974212, and 41774194; the Specialized Research Fund for State Key Laboratories; and the Construct Program of the Key Discipline in Hunan Province; the Open Research Fund of the Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments (201909), Changsha University of Science and Technology. We acknowledge the University of Iowa as the source for the EMFISIS data (this acknowledgment does not imply endorsement of the publication by the University of Iowa or its researchers).

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Auroral kilometric radiations (AKR) are widely existing superluminous waves in the magnetosphere. Due to rarely available measurements of AKR magnetic field components, we derive the explicit expression of diffusion coefficients in terms of electric field components, which can be applied to various space plasma waves. Using Van Allen Probes data, we calculate diffusion coefficients with different harmonic orders for two AKR events. It is found that the first (higher) harmonic order contributes to diffusion coefficients at small (larger) pitch a...