对高能粒子扩散理论NLGC-E的系数研究
发布时间：2019-08-02 19:09
【摘要】：带电粒子的扩散机制一直被认为是天体物理学的一个很重要的问题.最近,Matthaeus等人在2003年得出了带电粒子垂直扩散的非线性引导中心理论(NLGC),该理论采用平行扩散系数作为一个输入,这个NLGC理论与数值模拟结果符合得比较好.另外,Qin在2007年得到了非线性的平行扩散理论(NLPA),这个理论如果与NLGC理论联立可以得到扩展的非线性引导中心理论(NLGC-E),该理论是两个积分方程的形式并且可以用来同时求出平行和垂直扩散系数.NLGC理论中有一个系数a~2,通过与数值模拟结果比较选定最佳值为1/3.尝试改变NLGC-E中的系数a~2,确定与模拟结果吻合最好的系数值.
[Abstract]:The diffusion mechanism of charged particles has always been considered to be a very important issue in Astrophysics. Recently, Matthaeus et al., in 2003, obtained the nonlinear guiding center theory of vertical diffusion of charged particles (NLGC), which uses parallel diffusion coefficient as an input, and this NLGC theory is in good agreement with the numerical simulation results. In addition, Qin obtained the nonlinear parallel diffusion theory (NLPA), in 2007, which can be used to obtain the extended nonlinear guiding center theory (NLGC-E) if it is combined with the NLGC theory. This theory is in the form of two integral equations and can be used to calculate the parallel and vertical diffusion coefficients at the same time. There is a coefficient a 鈮，
本文编号：2522311
[Abstract]:The diffusion mechanism of charged particles has always been considered to be a very important issue in Astrophysics. Recently, Matthaeus et al., in 2003, obtained the nonlinear guiding center theory of vertical diffusion of charged particles (NLGC), which uses parallel diffusion coefficient as an input, and this NLGC theory is in good agreement with the numerical simulation results. In addition, Qin obtained the nonlinear parallel diffusion theory (NLPA), in 2007, which can be used to obtain the extended nonlinear guiding center theory (NLGC-E) if it is combined with the NLGC theory. This theory is in the form of two integral equations and can be used to calculate the parallel and vertical diffusion coefficients at the same time. There is a coefficient a 鈮，
本文编号：2522311
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