Investigation of Atomic Collisional.Radiative Processes in Neutral Particle Beams and Its Application to Plasma Diagnostics

中性粒子束中原子碰撞辐射过程的研究及其在等离子体诊断中的应用

基本信息

批准号：
03680012
负责人：
ODA Toshiatsu
金额：
$ 1.15万
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：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

We investigated numerically the atomic collisional-radiative processes in neutral particle beam for plasma diagnostics in magnetic fusion plasmas 1. To make numerical studies on processes of excitation, ionization and radiation including laser-induced fluorescences in helium neutral particle beam injected into tokamak plasmas, we formulated a set of rate equations based on a collisional-radiative model. The proton-impact excitation, ionization and charge exchanges were taken into account as well as the electron-impact processes, and local selective excitations by pulse laser were also considered. The programing was made to numerically solve the simultaneous differential equations for the populations of helium excited states up to the principal quantum number n=5.A set of numerical solutions of the temporal and spatial changes of the populations was obtained in a tokamak plasma, and the result was shown to be useful for study of the atomic processes in the particle beam. 2. The Stark-Zeeman patterns of a laser-induced fluorescence line of the helium atom in the particle beam were calculated, the Stark effect being due to the vxB electric field in the tokamak magnetic field. The forbidden excitation due to the Stark effect from the triplet meta-stable state was the subject of calculation. For the lithium particle beam the polarization of the laser- induced fluorescence arising from the corresponding forbidden excitation was also studied. 3. The recombination processes of the helium atom were also investigated on the basis of a collisional-radiative model.

我们从数值上研究了中性粒子束中的原子碰撞辐射过程，用于磁融合等离子体中的血浆诊断1。以对激发，电离，电离和辐射过程进行数值研究，包括激光诱导的荧光，包括激光诱导的荧光中性粒子中性粒子束中性粒子，我们注射到托卡马克等离子体中，我们基于碰撞模型制定了一组速率方程。还考虑了质子影响激发，电离和电荷交换以及电子影响过程，还考虑了脉冲激光器的局部选择性激发。该编程是为了在数值上求解同时求解氦激发态的种群，直到主量子数n = 5.a，在tokamak plasma和该结果被证明可用于研究粒子束中的原子过程。 2。计算了粒子梁中氦原子的激光诱导的荧光线的鲜明模式，鲜明的效果是由于Tokamak磁场中的VXB电场引起的。由于三胞胎元稳定状态的鲜明效应引起的禁止激发是计算的主题。对于锂颗粒梁，还研究了激光诱导的荧光的极化，还研究了由相应的禁止激发产生的。 3。还根据碰撞模型研究了氦原子的重组过程。