Modeling of particle fueling process by hydrogen pellet injection and its experimental validation

弹丸注入是磁聚变堆最有前途的燃料技术。在这项研究中，弹丸烧蚀和密度均匀化过程进行了研究和建模，用于评估质量沉积配置文件的氢弹丸注入到大螺旋装置（LHD）。考虑到固体氢的烧蚀，致密的等离子体云的形成，和沉积云的漂移运动的模拟代码的开发。一个进展，已在验证开发的模型对实验结果。结果表明，模拟结果很好地再现了测量的烧蚀和沉积剖面的主要特征。

Pellet injection is the most promising technique for fueling magnetic fusion reactors. In this study, the pellet ablation and density homogenization processes have been investigated and modeled for evaluating mass deposition profiles of hydrogen pellets injected into the Large Helical Device(LHD). A simulation code that takes into account ablation of solid hydrogen, formation of dense plasma cloud, and drift motion of a deposited cloud was developed. A progress has been made in validating the developed model against the experimental results. It was shown that simulation results well reproduce main characteristics of the measured ablation and deposition profiles in the LHD.