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ELM elimination with Li powder injection in EAST discharges using the tungsten upper divertor

机译：使用钨上部分流器在EAST放电中通过锂粉注入消除ELM

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摘要

We report the first successful use of lithium (Li) to eliminate edge-localized modes (ELMs) with tungsten divertor plasma-facing components in the EAST device. Li powder injected into the scrape-off layer of the tungsten upper divertor successfully eliminated ELMs for 3-5 s in EAST. The ELM elimination became progressively more effective in consecutive discharges at constant lithium delivery rates, and the divertor D_α baseline emission was reduced, both signatures of improved wall conditioning. A modest decrease in stored energy and normalized energy confinement was also observed, but the confinement relative to H98 remained well above 1, extending the previous ELM elimination results via Li injection into the lower carbon divertor in EAST (Hu et al 2015 Phys. Rev. Lett. 114 055001). These results can be compared with recent observations with lithium pellets in ASDEX-Upgrade that failed to mitigate ELMs (Lang et al 2017 Nucl. Fusion 57 016030), highlighting one comparative advantage of continuous powder injection for real-time ELM elimination.
机译：我们报道了在EAST设备中首次成功使用锂（Li）消除了带有钨偏滤器等离子组件的边缘定位模式（ELM）。锂粉注入到钨上部分流器的刮除层中，在EAST中成功消除了3-5 s的ELM。在恒定的锂输送速率下，ELM消除在连续放电中逐渐变得更加有效，并且偏滤器D_α基准线的排放减少，这两个特征均改善了墙面调节性能。还观察到储能的适度下降和归一化的能量限制，但相对于H98的限制仍远高于1，该限制通过将锂注入到EAST的低碳分流器中扩展了先前的ELM消除结果（Hu等人2015 Phys.Rev。 Lett.114 055001）。这些结果可以与最近在ASDEX-Upgrade中使用锂颗粒的观察结果进行比较，但未能缓解ELM（Lang等人2017 Nucl.Fusion 57 016030），突出了连续粉末注射用于实时消除ELM的比较优势。

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  • 来源
    《Nuclear fusion》 |2018年第2期|024003.1-024003.7|共7页
  • 作者

    R. Maingi; J.S. Hu; Z. Sun; K. Tritz; G.Z. Zuo; W. Xu; M. Huang; X.C. Meng; J.M. Canik; A. Diallo; R. Lunsford; D.K. Mansfield; T.H. Osborne; X.Z. Gong; Y.F. Wang; Y.Y. Li;

  • 作者单位

    Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America;

    Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Johns Hopkins University, Baltimore, MD 21211, United States of America;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Department of Applied Physics, Hunan University, Changsha 410082, People's Republic of China;

    Oak Ridge National Laboratory, Oak Ridge, TN 37830, United States of America;

    Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America;

    Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America;

    Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America;

    General Atomics, San Diego, CA 92121, United States of America;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China;

  • 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

    edge localized modes; plasma wall interactions; lithium seeding; edge stability;

    机译：边缘局部化模式血浆壁相互作用;锂种子边缘稳定性;

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