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Measurements of fast-ion transport by mode-particle resonances on DIII-D

机译:在DIII-D上通过模式粒子共振测量快速离子传输

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摘要

Magnetohydrodynamic (MHD) instabilities in tokamak plasmas manifest in a variety of ways, characterized by different scale lengths and mode frequencies. MHD activity can cause significant degradation of plasma performance due to transport of particles, energy and current. Among the many different types of MHD, arguably fishbones, sawteeth and Alfven eigenmodes (AEs) are observed to cause the largest fluxes of superthermal ions. DIII-D's expansive suite of diagnostics makes it possible to rigorously characterize these instabilities and study their interaction with fast ions. This review paper first presents an overview of the recent additions to DIII-D's collection of fast-ion diagnostics. The extended diagnostic capabilities are employed in a series of experiments to investigate fast-ion dynamics in the presence of fishbones, sawteeth and AEs. Results from these seemingly unrelated studies are highlighted, and they reveal that mode-particle resonances play the central role in the observed deterioration of fast-ion confinement.
机译:托卡马克等离子体中的磁流体动力学(MHD)不稳定性以多种方式表现出来,其特征在于不同的标度长度和模式频率。由于颗粒,能量和电流的传输,MHD活性可能导致等离子体性能显着下降。在许多不同类型的MHD中,可以观察到鱼骨,锯齿和Alfven本征模式(AE)引起最大的超温离子通量。 DIII-D广泛的诊断套件可对这些不稳定性进行严格表征,并研究其与快速离子的相互作用。这篇综述文章首先概述了DIII-D快速离子诊断试剂的最新添加。扩展的诊断能力用于一系列实验中,以研究鱼骨,锯齿和AE的存在下的快速离子动力学。这些看似无关的研究结果得到了强调,它们揭示了模式粒子共振在观察到的快速离子限制的恶化中起着核心作用。

著录项

  • 来源
    《Nuclear fusion》 |2012年第10期|p.103022.1-103022.10|共10页
  • 作者单位

    Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA;

    Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA;

    CompX, Del Mar, CA 92014, USA;

    Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA;

    General Atomics, San Diego, CA 92186, USA;

    General Atomics, San Diego, CA 92186, 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
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