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

球团注入是最有前途的磁聚变反应堆燃料技术。在这项研究中，研究了球团烧蚀和密度均匀化过程，并建立了模型，以评估注入大螺旋装置（LHD）的氢球团的质量沉积曲线。开发了考虑固体氢烧蚀、致密等离子体云形成和沉积云漂移运动的模拟程序。在用实验结果验证所建立的模型方面取得了进展。结果表明，模拟结果较好地再现了LHD内实测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.