大型螺旋装置外围等离子体中硼尘粒注入的自洽输运模拟

IF 1.3 4区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS
M. Shoji, G. Kawamura, R. Smirnov, Y. Tanaka, S. Masuzaki, F. Nespoli, E. Gilson, R. Lunsford
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引用次数: 0

摘要

利用三维边缘等离子体模拟代码(EMC3-EIRENE)和尘埃传输模拟代码(DUSTT)计算了大型螺旋装置(LHD)外围等离子体中从杂质粉末滴管滴下的硼尘埃粒子的运动轨迹和烧蚀位置。模拟结果表明,由于氢等离子体流的影响,硼尘埃粒子的轨迹在分流器上部发生偏转,等离子体密度较高时,等离子体层中尘埃粒子的烧蚀位置向环的外侧变化。通过自洽耦合两种代码,研究了硼离子流在分流器支腿中对偏转的影响。模拟预测,硼离子在分流板上溅射产生的硼离子不会影响烧蚀位置的变化。模拟结果还显示,在硼尘下降率增加的情况下,烧蚀位置会向内侧移动,并接近最后封闭通量面(LCFS),这是由于电子温度被下降的尘粒辐射冷却而降低,从而降低了分流器上部的等离子体流量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Self-consistent transport simulation of boron dust particle injection in the peripheral plasma in Large Helical Device

Self-consistent transport simulation of boron dust particle injection in the peripheral plasma in Large Helical Device

The trajectories and the ablation positions of boron dust particles dropped from an impurity powder dropper in the peripheral plasma in the Large Helical Device (LHD) were calculated using a three-dimensional edge plasma simulation code (EMC3-EIRENE) and a dust transport simulation code (DUSTT). The simulation shows that the trajectory of the boron dust particles is deflected at the upper divertor leg due to the effect of the hydrogen plasma flow, and the ablation positions of the dust particles in an ergodic layer change toward the outboard side of the torus for higher plasma densities. The effect of the boron ion flow in the divertor leg on the deflection is investigated by coupling the two codes self-consistently. The simulation predicts that the boron ions in the divertor leg, which are produced by sputtering on the divertor plates, which do not affect the change in the ablation positions. It also shows that the ablation positions move toward the inboard side and approach the Last Closed Flux Surface (LCFS) in case of increased boron dust drop rates, which is caused by the lowered plasma flow in the upper divertor leg due to the lowered electron temperature by radiation cooling by the dropped dust particles.

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来源期刊
Contributions to Plasma Physics
Contributions to Plasma Physics 物理-物理:流体与等离子体
CiteScore
2.90
自引率
12.50%
发文量
110
审稿时长
4-8 weeks
期刊介绍: Aims and Scope of Contributions to Plasma Physics: Basic physics of low-temperature plasmas; Strongly correlated non-ideal plasmas; Dusty Plasmas; Plasma discharges - microplasmas, reactive, and atmospheric pressure plasmas; Plasma diagnostics; Plasma-surface interaction; Plasma technology; Plasma medicine.
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