磁层内高能电子的theIMPTAM-VERB耦合模型模拟
Simulations of the inner magnetospheric energetic electrons using theIMPTAM-VERB coupled model
摘要：
在这项研究中，我们提出的内部磁层粒子传输和加速模型（IMPTAM）和多功能电子辐射带（VERB-3D）代码之间的耦合的初步结果。IMPTAM跟踪电子的10 - 100 keV的能量从等离子体片（L = 9 Re）的内部L-壳层区域。IMPTAM模拟的通量演化用于VERB代码（假设偶极近似）的低能量和外部L* 计算边界，以执行高能电子的辐射带模拟。该模型在2013年3月17日的风暴中进行了为期六天的测试。进行了四种不同的模拟，并将其结果与范艾伦探测器和GOES的卫星观测结果进行了比较。耦合的IMPTAM-VERB模式再现了整个研究风暴的电子通量的演变和风暴时间特征，与卫星数据一致（约0.5个数量级）。包括在L* = 6.6的低能量人口的动态增加通量更接近的心脏地带，并在VERB模拟在所有能量有很强的影响。然而，列入磁层顶损失导致急剧的通量下降，甚至低于L* = 3。低能量电子的动力学（最大值）10 keV）不影响能量>= 900 keV的电子通量。由于IMPTAM-VERB耦合模式仅由太阳风参数和Dst、Kp指数驱动，因此适合作为预报工具。在这项研究中，我们表明，估计电子动力学与卫星数据无关的模型是可能的，非常准确。
英文摘要：
In this study, we present initial results of the coupling between the Inner Magnetospheric Particle Transport and Acceleration Model (IMPTAM) and the Versatile Electron Radiation Belt (VERB-3D) code. IMPTAM traces electrons of 10 - 100 keV energies from the plasma sheet (L = 9 Re) to inner L-shell regions. The flux evolution modeled by IMPTAM is used at the low energy and outer L* computational boundaries of the VERB code (assuming a dipole approximation) to perform radiation belt simulations of energetic electrons. The model was tested on the March 17th, 2013 storm, for a six-day period. Four different simulations were performed and their results compared to satellites observations from Van Allen probes and GOES. The coupled IMPTAM-VERB model reproduces evolution and storm-time features of electron fluxes throughout the studied storm in agreement with the satellite data (within ~0.5 orders of magnitude). Including dynamics of the low energy population at L* = 6.6 increases fluxes closer to the heart of the belt and has a strong impact in the VERB simulations at all energies. However, inclusion of magnetopause losses leads to drastic flux decreases even below L* = 3. The dynamics of low energy electrons (max. 10s of keV) do not affect electron fluxes at energies >= 900 keV. Since the IMPTAM-VERB coupled model is only driven by solar wind parameters and the Dst and Kp indexes, it is suitable as a forecasting tool. In this study, we demonstrate that the estimation of electron dynamics with satellite-data-independent models is possible and very accurate.
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