Particle acceleration and transport in solar flares

为了了解太阳耀斑中粒子加速和输运的机制，我们建立了一个基于漂移动力学理论的数值模型。在势场构型下，我们发现电子在闭合环的顶部和沿着开场线被加速。在考虑俯仰角散射的情况下，环顶电子的峰值高度取决于它们的能量。这一结果可以解释“环顶以上”硬X射线源的起源。另一方面，在更复杂的场形下，我们发现沿闭合场线的脉冲电子通量。

To understand the mechanism of particle acceleration and transport in solar flares, we develop a numerical model based on the drift-kinetic theory. Under a potential magnetic field configuration, we find that electrons are accelerated at the top of closed loops and along open field lines. With including the pitch-angle scattering, the peak height of loop-top electrons depends on their energy. This result can explain the origin of the "above-the-loop-top" hard X-ray sources. Under a more complicated field configuration, on the other hand, we find an impulsive electron flux along the closed field lines.