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Edge localized mode control experiments on MAST using resonant magnetic perturbations from in-vessel coils

机译:MAST的边缘局部模式控制实验,使用了来自船内线圈的共振磁扰动

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Edge localized mode (ELM) control has been investigated on MAST with a set of in-vessel coils producing n = 3 perturbations. In spite of a broad enough region where the Chirikov parameter is above 1, according to the criterion employed for the design of the ITER ELM control coils, no effect was seen on type I ELMs. The behaviour on MAST is different from that in DIII-D in this respect. The coils do have an effect, however, on Ohmic L-mode plasmas and plasmas just above the L–H transition. In the former, they induce a density pump-out, modify the turbulence characteristics and edge radial electric field and produce a strike point splitting, while in the latter they can trigger ELMs in ELM-free plasmas.
机译:边缘定位模式(ELM)控制已在MAST上进行了研究,带有一组产生n = 3个扰动的置入线圈。尽管Chirikov参数大于1的区域足够宽,但根据ITER ELM控制线圈设计所采用的标准,对I型ELM没有影响。在这方面,MAST上的行为与DIII-D中的行为不同。但是,线圈确实会对欧姆L型等离子体和刚好位于L–H跃迁上方的等离子体产生影响。在前者中,它们引起密度泵出,改变湍流特性和边缘径向电场并产生击穿点分裂,而在后者中,它们可以触发不含ELM的等离子体中的ELM。

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