论文标题
使用Fokker-Planck动力学理论对非热颗粒进行建模
Modeling the Transport of Nonthermal Particles in Flares Using Fokker-Planck Kinetic Theory
论文作者
论文摘要
我们描述了一种新方法，用于建模从太阳能电晕加速区域的耀斑中加速的高能颗粒的运输，直到最终在耀斑脚点中进行热化。我们的技术在数值上求解了fokker-Planck方程，并包括与库仑相对应的力，其磁带碰撞在通量环中，具有不均匀的电离，同步加速器发射反应，磁性镜像和返回电流电场。我们对Fokker-Planck方程的解决方案包括二阶螺距角和动量扩散。它适用于任意质量和电荷的颗粒。通过跟踪碰撞，我们预测这些颗粒与环境恒星大气相互作用时产生的bremsstrahlung。可以将其直接与观测值进行比较，并用于限制加速的颗粒能分布。我们已经命名了我们的数值代码FP，并将其分发供一般使用。我们证明了它在几种测试案例中的有效性。
We describe a new approach for modeling the transport of high energy particles accelerated during flares from the acceleration region in the solar corona until their eventual thermalization in the flare footpoint. Our technique numerically solves the Fokker-Planck equation and includes forces corresponding to Coulomb collisions in a flux loop with nonuniform ionization, synchrotron emission reaction, magnetic mirroring and a return current electric field. Our solution to the Fokker-Planck equation includes second-order pitch angle and momentum diffusion. It is applicable to particles of arbitrary mass and charge. By tracking the collisions, we predict the bremsstrahlung produced as these particles interact with the ambient stellar atmosphere. This can be compared directly with observations and used to constrain the accelerated particle energy distribution. We have named our numerical code FP and have distributed it for general use. We demonstrate its effectiveness in several test cases.
