發(fā)布時間：2019-08-02 19:09

【摘要】：帶電粒子的擴(kuò)散機(jī)制一直被認(rèn)為是天體物理學(xué)的一個很重要的問題.最近,Matthaeus等人在2003年得出了帶電粒子垂直擴(kuò)散的非線性引導(dǎo)中心理論(NLGC),該理論采用平行擴(kuò)散系數(shù)作為一個輸入,這個NLGC理論與數(shù)值模擬結(jié)果符合得比較好.另外,Qin在2007年得到了非線性的平行擴(kuò)散理論(NLPA),這個理論如果與NLGC理論聯(lián)立可以得到擴(kuò)展的非線性引導(dǎo)中心理論(NLGC-E),該理論是兩個積分方程的形式并且可以用來同時求出平行和垂直擴(kuò)散系數(shù).NLGC理論中有一個系數(shù)a~2,通過與數(shù)值模擬結(jié)果比較選定最佳值為1/3.嘗試改變NLGC-E中的系數(shù)a~2,確定與模擬結(jié)果吻合最好的系數(shù)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，

本文編號：2522311