Study of high density plasmoid dynamics by high speed imaging spectroscopy measurement

为了研究用于核聚变反应堆的固体氢球补给的弹丸等离子体动力学物理，用高速成像光谱学方法成功地测量了等离子体中的内部分布。在该光谱系统中，使用了带五臂的光纤显微镜。研究了等离子体中电子密度分布随时间的变化规律。比较了不同背景等离子体下等离子体中的电子密度。通过内部测量的观察有助于理解弹丸烧蚀的机理。

To investigate the physics of pellet plasmoid dynamics for the establishment of solid hydrogen pellet refuelling towards a nuclear fusion reactor, internal distribution measurements in the plasmoid by high-speed imaging spectroscopy have been successfully developed. In this spectroscopic system, a fiber scope with five-arms is used. The time dependence of electron density distribution in the plasmoid is investigated. The electron density in the plasmoid is compared at different background plasmas. The observations by the internal measurements contribute to the understanding of pellet ablation mechanism.