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Particle Acceleration at Coronal Mass Ejection-driven Shock Waves:Modeling of Enhancement in Low-energy Range of a Proton Flux

机译:冠状质量喷射驱动冲击波的粒子加速度:质子通量低能量范围内的增强建模

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We study time evolution of an energy spectrum of a proton flux in the range of 47 - 4750 keV for the energetic particle event occurred on 255 DOY in 1999.It is found that the energy spectrum in lower energy range,less than 0.5 MeV,enhanced faster,that is,the spectrum gets softer.We also analyze the magnetic field data to find energy dependence of a diffusion coefficient.We perform modeling this event by numerical simulations using Stochastic Differential Equation method.Our simulation results suggest that insufficiently accelerated particles may exist around 1 AU to explain the evolutionary behavior of the energy spectrum.
机译:我们在1999年255 doy中研究了47-4750kev的质子通量的能谱的时间演变为47-4750kev的电量粒子事件。较低能量范围内的能谱,小于0.5 meV,增强更快,即频谱变得更柔和。我们还分析磁场数据以找到扩散系数的能量依赖性。我们使用随机微分方程方法通过数值模拟进行建模这一事件。我们的仿真结果表明可能存在不充分加速的粒子大约1 AU解释能谱的进化行为。

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