Resonant magnetic perturbations of edge-plasmas in toroidal confinement devices
Resonant magnetic perturbations of edge-plasmas in toroidal confinement devices
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DOI：
10.1088/0741-3335/57/12/123001
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发表时间：
2015-11
影响因子：
2.2
通讯作者：
T. Evans
中科院分区：
文献类型：
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作者：
T. Evans
在聚变级高性能等离子体放电中控制边界层是环向磁约束发电系统成功发展的关键。控制边界等离子体的一种有前途的方法是基于使用小的、外部施加的边缘谐振磁扰动（RMP）场（δb⊥≈10−4→10−3 T ?>）。托卡马克聚变研究的一个长期重点领域是寻找方法，包括使用非轴对称磁扰动来减少对壁面的强烈粒子和热通量。实验RMP研究已经从20世纪70年代对具有材料限制器的托卡马克的早期开创性工作发展到目前在高约束模式下运行的分离矩阵限制托卡马克的研究，其主要目的是减轻由于边缘局域模式（elm）引起的间歇性通量。与此同时，理论研究已经从分析模型发展到数值模拟，包括问题的完整3D复杂性。在2003年DIII-D托卡马克首次演示了ELM抑制之后，在理论、数值和实验边缘RMP研究方面，世界范围内的快速增长导致在ITER基线设计中增加了ELM控制线圈（Loarte et al . 2014 nuclear）。Fusion 54 033007)。本文综述了边缘RMP研究的概况，包括对早期理论和数值背景的总结，以及最近在边缘RMP场引发的托卡马克中改进的粒子和能量约束的实验结果。所涵盖的主题构成了开发更好地理解3D磁扰动物理所需的基本元素，这是为了充分利用边缘RMP场在聚变相关高性能，h模式，等离子体中的全部潜力所必需的。
Controlling the boundary layer in fusion-grade, high-performance, plasma discharges is essential for the successful development of toroidal magnetic confinement power generating systems. A promising approach for controlling the boundary plasma is based on the use of small, externally applied, edge resonant magnetic perturbation (RMP) fields (δb⊥ext≈10−4→10−3 T ?>). A long-term focus area in tokamak fusion research has been to find methods, involving the use of non-axisymmetric magnetic perturbations to reduce the intense particle and heat fluxes to the wall. Experimental RMP research has progressed from the early pioneering work on tokamaks with material limiters in the 1970s, to present day research in separatrix-limited tokamaks operated in high-confinement mode, which is primarily aimed at the mitigation of the intermittent fluxes due edge localized modes (ELMs). At the same time, theoretical research has evolved from analytical models to numerical simulations, including the full 3D complexities of the problem. Following the first demonstration of ELM suppression in the DIII-D tokamak during 2003, there has been a rapid worldwide growth in theoretical, numerical and experimental edge RMP research resulting in the addition of ELM control coils to the ITER baseline design (Loarte et al 2014 Nucl. Fusion 54 033007). This review provides an overview of edge RMP research including a summary of the early theoretical and numerical background along with recent experimental results on improved particle and energy confinement in tokamaks triggered by edge RMP fields. The topics covered make up the basic elements needed for developing a better understanding of 3D magnetic perturbation physics, which is required in order to utilize the full potential of edge RMP fields in fusion relevant high performance, H-mode, plasmas.