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首页> 外文期刊>Journal of nuclear science and technology >Modeling of Neutral Transport in Linear Divertor Plasma Using First Flight Collision Probability Method
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Modeling of Neutral Transport in Linear Divertor Plasma Using First Flight Collision Probability Method

机译：基于第一飞行碰撞概率方法的线性分流器等离子体中性传输模型

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摘要

A hybrid model of diffusion and first flight collision probability (FFCP) for two-dimensional (2-D) neutral transport has been developed to analyze neutral behavior in linear gas divertors. In the model, the axial transport of the neutrals is described by the diffusion approximation, while the FFCP model is applied to the radial neutral transport. The model is applied to the analysis of PISCES-A experiments for the model validation. Calculated density profiles of atomic and molecular hydrogen are qualitatively in good agreement with the experimental results. The molecular density sharply decreases near the ionization region where the electron density profile has the maximum. This sharp decrease in the molecular density leads to the atomic density peak. In addition, a sensitivity study of the wall reflection condition suggests that the wall recombination of atoms and the reemission as molecules are important processes to interpret the experimental results.
机译：建立了二维（2-D）中性传输的扩散和第一飞行碰撞概率（FFCP）的混合模型，以分析线性气体分流器的中性行为。在该模型中，中性点的轴向传输通过扩散近似来描述，而FFCP模型则用于径向中性传输。该模型应用于PISCES-A实验分析以进行模型验证。定性地计算出的原子氢和分子氢的密度分布与实验结果吻合良好。在电子密度分布最大的电离区域附近，分子密度急剧下降。分子密度的急剧下降导致原子密度峰。此外，对壁反射条件的敏感性研究表明，原子的壁重组和分子的重新发射是解释实验结果的重要过程。

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