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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Formation of the inner electron radiation belt by enhanced large-scale electric fields
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Formation of the inner electron radiation belt by enhanced large-scale electric fields

机译：内部电子辐射带的形成增强大规模电场

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A two-dimensional bounce-averaged test particle code was developed to examine trapped electron trajectories during geomagnetic storms with the assumption of conservation of the first and second adiabatic invariants. The March 2013 storm was selected as an example because the geomagnetic activity Kp index sharply increased from 2 + to 7- at 6:00 UT on 17 March. Electron measurements with energies between 37 and 460 keV from the Magnetic Electron Ion Spectrometer (MagEIS) instrument onboard Van Allen Probes (VAP) are used as initial conditions prior to the storm onset and served to validate test particle simulations during the storm. Simulation results help to interpret the observed electron injection as nondiffusive radial transport over a short distance in the inner belt and slot region based on various electric field models, although the quantitative comparisons are not precise. We show that electron drift trajectories are sensitive to the selection of electric field models. Moreover, our simulation results suggest that the actual field strength of penetration electric fields during this storm is stronger than any existing electric field model, particularly for L ≤ 2.
机译：一个二维bounce-averaged测试粒子代码检查俘获电子开发的在地磁风暴的轨迹假设第一和守恒第二个绝热不变量。被选为一个例子,因为Kp地磁活动指数大幅增加从2 + 6点7 - UT 3月17日。测量与37 - 460 keV能量从磁电子离子谱仪(MagEIS)车载范艾伦辐射探测工具(VAP)作为初始条件前粒子风暴爆发,验证测试模拟在暴风雨中。帮助解释观察到的电子注入作为nondiffusive径向传输短基于距离内部辐射带和槽地区在不同的电场模型,虽然定量比较不精确。这个电子漂移轨迹很敏感电场模型的选择。我们的模拟结果表明,实际的渗透电场的场强在这风暴比任何现有的电场模型,特别是对L≤2。

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