Dust remobilization in fusion plasmas under steady state conditions
Dust remobilization in fusion plasmas under steady state conditions
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DOI：
10.1088/0741-3335/58/2/025009
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发表时间：
2015-08
影响因子：
2.2
通讯作者：
P. Tolias;S. Ratynskaia;M. De Angeli;G. De Temmerman;D. Ripamonti;G. Riva;I. Bykov;A. Shalpegin;L. Vignitchouk;F. Brochard;K. Bystrov;S. Bardin;A. Litnovsky
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文献类型：
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作者：
P. Tolias;S. Ratynskaia;M. De Angeli;G. De Temmerman;D. Ripamonti;G. Riva;I. Bykov;A. Shalpegin;L. Vignitchouk;F. Brochard;K. Bystrov;S. Bardin;A. Litnovsky
首次报道了等离子体力作用下尘埃再活化的实验和理论研究。分析了稳态条件下聚变装置再动员的主要理论问题。特别是，粘附力的主导作用是突出和通用的再动员条件直接解除，滑动，滚动制定。提出了一种新的实验技术，根据控制粘附的钨样品上的灰尘颗粒结合的灰尘沉积轮廓的详细映射之前和之后的等离子体暴露。介绍了在TEXTOR托卡马克和EXTRAP-T2 R反场箍缩装置上的原理验证实验。Pilot-PSI线性设备的多功能环境允许使用不同的磁场拓扑结构和不同的等离子体条件进行实验，并辅以相机观察。
The first combined experimental and theoretical studies of dust remobilization by plasma forces are reported. The main theoretical aspects of remobilization in fusion devices under steady state conditions are analyzed. In particular, the dominant role of adhesive forces is highlighted and generic remobilization conditions—direct lift-up, sliding, rolling—are formulated. A novel experimental technique is proposed, based on controlled adhesion of dust grains on tungsten samples combined with detailed mapping of the dust deposition profile prior and post plasma exposure. Proof-of-principle experiments in the TEXTOR tokamak and the EXTRAP-T2R reversed-field pinch are presented. The versatile environment of the linear device Pilot-PSI allowed for experiments with different magnetic field topologies and varying plasma conditions that were complemented with camera observations.