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Modification of divertor heat and particle flux profiles with applied 3D fields in NSTX H-mode plasmas

机译：在NSTX H型等离子体中应用3D场修改偏滤器热和粒子通量分布

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摘要

Externally imposed non-axisymmetric magnetic perturbations are observed to alter divertor heat and particle flux profiles in the National Spherical Torus Experiment (NSTX). The divertor profiles are found to have a modest level of multiple local peaks, characteristic of strike point splitting or the 'magnetic lobe' structure, even before the application of the 3D fields in some (but not all) NSTX discharges. This is thought to be due to the intrinsic error fields. The applied 3D fields augmented the intrinsic strike point splitting, making the amplitude of local peaks and valleys larger in the divertor profile and striations at the divertor surface brighter. The measured heat flux profile shows that the radial location and spacing of the striations are qualitatively consistent with a vacuum field tracing calculation. 3D field application did not change the peak divertor heat and particle fluxes at the toroidal location of measurement. Spatial characteristics of the observed patterns are also reported in the paper.
机译：在国家球形圆环实验（NSTX）中，观察到外部施加的非轴对称磁扰动会改变偏滤器的热量和粒子通量分布。即使在某些（但不是全部）NSTX放电中施加3D场之前，偏滤器的分布也具有适度的多个局部峰，具有击穿点分裂或“磁瓣”结构的特征。认为这是由于固有误差字段引起的。施加的3D场增强了固有的触击点分裂，使偏滤器轮廓中的局部峰和谷的振幅更大，并且偏滤器表面的条纹更亮。测得的热通量曲线表明，条纹的径向位置和间距与真空场跟踪计算在质量上是一致的。 3D现场应用并没有改变环形测量位置的峰值偏滤器热和颗粒通量。该论文还报道了观察到的模式的空间特征。

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  • 来源
    《Nuclear fusion》 |2010年第4期|p.14.1-14.7|共4页
  • 作者

    J.-W. Ahn; J.M. Canik; V.A. Soukhanovskii; R. Maingi; D.J. Battaglia;

  • 作者单位

    Oak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, TN 37831, USA Princeton Plasma Physics Laboratory, MS-15, Princeton, NJ 08543, USA;

    rnOak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, TN 37831, USA;

    rnLawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94551, USA;

    rnOak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, TN 37831, USA;

    rnOak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, TN 37831, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tokamaks, spherical tokamaks; power exhaust; divertors;

    机译：托卡马克;球形托卡马克;动力排气转向器;

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