论文标题
磁化湍流中的第一原理费米加速度
First-principles Fermi acceleration in magnetized turbulence
论文作者
论文摘要
这项工作提供了E. fermi在磁性水力动力（MHD）湍流中的颗粒加速度模型的具体实现，将能量速率连接到磁场线速度的梯度，在湍流间歇性的多帧图中，它在磁场线的速度中进行了特征。然后，它在动量空间中得出一个传输方程以进行分配函数。该描述被证明是通过强大的MHD湍流的大规模数值模拟来证实的。目前的一般框架可用于在各种环境中建模粒子加速度。
This work provides a concrete implementation of E. Fermi's model of particle acceleration in magnetohydrodynamic (MHD) turbulence, connecting the rate of energization to the gradients of the velocity of magnetic field lines, which it characterizes within a multifractal picture of turbulence intermittency. It then derives a transport equation in momentum space for the distribution function. This description is shown to be substantiated by a large-scale numerical simulation of strong MHD turbulence. The present, general framework can be used to model particle acceleration in a variety of environments.
