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首页> 外文期刊>Plasma physics and controlled fusion >Impact of magnetic perturbation coils on the edge radial electric field and turbulence in ASDEX Upgrade
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Impact of magnetic perturbation coils on the edge radial electric field and turbulence in ASDEX Upgrade

机译：ASDEX升级中的磁扰线圈对边缘径向电场和湍流的影响

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摘要

The impact of applied magnetic perturbations (MPs) on tokamak edge parameters has been investigated in ASDEX Upgrade low collisionallity L-mode discharges using a flexible set of in-vessel saddle coils (capable of generating n = 0, 1, 2 and 4 toroidal modes) and an extensive set of high resolution edge diagnostics. Doppler reflectometry is used principally to probe the MP field penetration and structure via the radial electric field E-r and density fluctuation delta n(e) behaviour. Different MP response behaviour are observed for the near scrape-off-layer, SOL, (where E-r flattens) and in the confinement region (where the negative E-r well reverses). The radial structure of E-r and delta n(e) are particularly sensitive to the degree of MP resonance with the edge rational field-lines. Specifically, the edge turbulence is enhanced for strongly resonant MPs and reduced when non-resonant. The toroidal structure of the MP response has also been probed for various MP configurations by rotating the MP field toroidally and is found to be different for the edge and near SOL regions.
机译：已在ASDEX升级版中通过使用一组灵活的船内鞍形线圈（能够产生n = 0、1、2和4环形模式）研究了施加的磁扰动（MPs）对托卡马克边缘参数的影响）和广泛的高分辨率边缘诊断程序。多普勒反射仪主要用于通过径向电场E-r和密度波动delta n（e）行为来探测MP场的穿透和结构。对于接近刮擦层SOL（E-r变平）和限制区域（负E-r井反转），观察到不同的MP响应行为。 E-r和delta n（e）的径向结构对MP与边缘有理力场线的共振程度特别敏感。具体地说，对于强烈共振的MP，边缘湍流得到增强，而在非共振时，边缘湍流则减小。还已通过旋转MP场环形检测了MP响应的环形结构的各种MP构造，发现其边缘和SOL区域不同。

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