Filament structures at the plasma edge on MAST
Filament structures at the plasma edge on MAST
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DOI：
10.1088/0741-3335/48/12b/s41
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发表时间：
2006-12-01
影响因子：
2.2
通讯作者：
Wilson, H. R.
中科院分区：
文献类型：
--
作者：
Kirk, A.;Ben Ayed, N.;Wilson, H. R.
托卡马克堆芯等离子体的边界，或刮除层，通常是其特征在于平均参数，如密度，温度和e-折叠长度表明扩散损失。然而，正如本文所示，局部化的边界结构在决定MAST上的L模式和边缘局部化模式（ELMs）的径向流出方面起着重要的作用。了解这些细丝的尺寸、极向和环形定位以及向外的径向范围是至关重要的，以便计算它们对未来装置中第一壁和偏滤器靶板上的功率负载的影响。在MAST的L-模式和ELMs上观察到的灯丝的空间和时间的演变进行了比较和对比，以面对已提出的预测灯丝的传播，特别是ELM能量损失的各种模型的预测。
The boundary of the tokamak core plasma, or scrape-off layer, is normally characterized in terms of average parameters such as density, temperature and e-folding lengths suggesting diffusive losses. However, as is shown in this paper, localized filamentary structures play an important role in determining the radial efflux in both L mode and during edge localized modes (ELMs) on MAST. Understanding the size, poloidal and toroidal localization and the outward radial extent of these filaments is crucial in order to calculate their effect on power loading both on the first wall and the divertor target plates in future devices. The spatial and temporal evolution of filaments observed on MAST in L-mode and ELMs have been compared and contrasted in order to confront the predictions of various models that have been proposed to predict filament propagation and in particular ELM energy losses.