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Observation of the bulk ion density peaking in a discharge with an impurity hole in the LHD

机译:观察LHD中带有杂质孔的放电中的体离子密度峰值

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摘要

Radial profiles of bulk ion and impurity ions density are simultaneously measured and quantified using charge exchange spectroscopy and peaking parameter, C_v. The peaking parameter is positive for inward and negative for outward convection in a plasma with an impurity hole in the Large Helical Device. Following the formation of an impurity hole associated with the transition from L-mode to ion ITB plasma, the bulk ion becomes peaked by the inward convection (C_v > 0), while impurities (helium and carbon) become hollow due to the outward convection (C_v < 0). In contrast to the ion ITB plasma, in the L-mode plasma the impurity profiles are peaked (C_v > 0), where the bulk ion density profile remains flat (C_v ~ 0). Understanding of the impurity behavior in the ion ITB plasma could lead to a self cleaning plasma reactor concept, with an efficient impurity exhaust.
机译:使用电荷交换光谱法和峰化参数C_v同时测量和量化体离子和杂质离子密度的径向分布。在大型螺旋装置中带有杂质孔的等离子体中,峰化参数对于向内对流为正,对于向外对流为负。在形成与L型跃迁到离子ITB等离子体相关的杂质孔之后,体离子通过向内对流(C_v> 0)达到峰值,而杂质(氦气和碳)由于向外对流而变成空心( C_v <0)。与离子ITB等离子体相反,在L型等离子体中,杂质分布达到峰值(C_v> 0),在该峰处,总体离子密度分布保持平坦(C_v〜0)。了解离子ITB等离子体中的杂质行为可能会导致自清洁等离子体反应器概念的产生,并有效地排出杂质。

著录项

  • 来源
    《Nuclear fusion》 |2017年第7期|1-7|共7页
  • 作者单位

    Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

    Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands;

    National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan;

  • 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

    LHD; charge exchange spectroscopy; helium exhaust; impurity transport; impurity hole;

    机译:LHD;电荷交换光谱氦气排放杂质传输杂质孔;

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