Dynamic behavior of non diffusive transport of high density plasmoid in high temperature plasmas

为了研究球团烧蚀动力学，利用立体快速相机和束状光纤对固体氢烧蚀进行了补充观测。通过烧蚀氢球团在球团物质周围形成的球团等离子体，间歇性地从球团烧蚀位置分离出来，分离出来的等离子体在约束场中传输。分离等离子体在100 kHz时循环发展，在10 μs的寿命内沿与球团运动相反的方向，即向低磁场侧非扩散传输约15 cm。这一观察结果合理地解释了颗粒烧蚀位置与有效颗粒沉积剖面之间的差异。

A complementary observation of solid hydrogen ablation has been performed by using a stereo fast camera and bundled fiber optics in order to investigate the pellet ablation dynamics. The pellet plasmoid which is formed around the pellet substance by ablating hydrogen pellet, intermittently breaks away from the pellet ablating position and the breakaway plasmoid is transported across a confinement field. The breakaway plasmoid recurrently develops at 100 kHz and it is non-diffusively transported approximately 15 cm during its 10 severalμs lifetime in the opposite direction to the pellet motion, namely, toward the low magnetic field side. This observation gives a reasonable explanation for the difference between the pellet ablation position and the effective particle deposition profile.