Theory and Simulation Study of Transport Processes in Magnetized Plasmas

磁化等离子体输运过程的理论与仿真研究

基本信息

批准号：
01580012
负责人：
NISHIKAWA Kyoji
金额：
$ 1.54万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

The purpose of the present research is to study the particle and energy transport of a magnetically confined plasma across the magnetic field over a macroscopic scale based on the particle kinetic theory. One useful method for this purpose is to use the particle simulation technique. To this end, the macroscale particle code which is applicable to study nonuniform and nonlinear plasma behaviors over a long time and large space scales has been developed. The development of the macroscale particle simulation code was started in 1984 and was completed in the fiscal year 1989 for the case of a plasma in nearly uniform density and magnetic field profile. In the fiscal year 1990, an improvement of this code was carried out with the aim to make it applicable to study of macroscopic and kinetic nonlinear phenomena in non-uniform high temperature plasmas. Namely, there are three requisits : 1) t he characteristic time scale be much larger than the electronic time scales (DELTAt>>omega_<CA>^<-1>, omega_<PA>^<-1>) ; 2) strong nonuniformity of the density and magnetic field be treated ; 3) arbitrary plasma shapes such as torus, noncirculer cross sections be treated. Of these, condition 1) was already satisfied, so the code was improved to satisfy condition 2) in 1990. Further improvement and applications to real systems are left to future work which will be conducted at the newly established National Institute for Fusion Science.As for the analytical work, a general expression for the particle drift flux across an arbitrary shape of magnetic field due to the ponderomotive force of high frequency electromagnetic fields was derived based on the single particle picture and was shown to be consistent with the flux based on the fluid picture. The nonambipolr flux which causes a radial electric field was derived.

本研究的目的是基于粒子动力学理论，研究磁性狭窄的等离子体在磁场上的粒子和能量转运。用于此目的的一种有用的方法是使用粒子模拟技术。为此，很长一段时间以来，它适用于研究非均匀和非线性等离子体行为的宏观粒子代码，并且已经开发出较大的空间尺度。宏观粒子仿真代码的发展始于1984年，并于1989财政年度完成，以几乎均匀的密度和磁场曲线的等离子体为例。在1990财政年度，进行了该代码的改进，目的是使其适用于研究非均匀高温等离子体中的宏观和动力学非线性现象。也就是说，有三个要求：1）特征时间尺度比电子时间尺度大得多（deltat >> omega_ <ca>^<-1>，omega_ <pa>^<-1>）; 2）处理密度和磁场的强均匀性； 3）请处理任意血浆形状，例如圆环，非电路横截面。其中，条件1）已经满足，因此改进了条件以满足条件2）在1990年满足条件。进一步的改进，对实际系统的应用将留给未来的工作，将在新成立的国家融合科学研究所进行，这将在分析工作中进行。作为分析工作的一般表达，是粒子漂移的一般表达，这是跨越了磁场的粒子范围，这是由于高频磁场的磁场，这是高频的磁场，并且是高频电子的磁场，并且是高频电子的磁场。与基于流体图片的通量一致。得出了引起径向电场的非bambipolr通量。