Dominant Roles of High Harmonics on Interactions Between AKR and Radiation Belt Relativistic Electrons
Dominant Roles of High Harmonics on Interactions Between AKR and Radiation Belt Relativistic Electrons
复制标题
高次谐波对AKR与辐射带相对论电子相互作用的主导作用
DOI：
10.1029/2020gl088421
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发表时间：
2020-08
影响因子：
5.2
通讯作者：
Fuliang Xiao
中科院分区：
文献类型：
--
作者：
Sai Zhang;Xiongjun Shang;Yihua He;Si Liu;Fuliang Xiao
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 angles. The effect of higher harmonic orders becomes more significant as the electron energy increases. These results are contrary to the case of chorus wave, in which the first order usually contributes much to wave‐particle interactions. Estimations show that the phase space density of 0.5 MeV electrons can increase ∼10 times within 6 hr by AKR. This study is important for better modeling of AKR‐induced radiation belt electron dynamics.
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影响因子：
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通讯作者：
P. Pritchett;R. Strangeway;R. Ergun;C. Carlson
解释范艾伦辐射带中极光千米辐射的发生
影响因子：
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作者：
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影响因子：
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影响因子：
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通讯作者：
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