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A study of X-divertor in NSTX-U with SOLPS simulations

机译:用SOLPS模拟研究NSTX-U中的X偏向器

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摘要

The X-divertor (XD) geometry in NSTX-U is demonstrated, via SOLPS simulations, to perform better than the standard divertor (SD); in particular, it allows detachment at a lower upstream density and stabilizes the detachment front near the target, away from the main X-point. Consequently a stable detached operation becomes possible-the localization near the plate allows a vast reduction of heat fluxes without degrading the core plasma. Indeed, it is confirmed by our simulation that at similar states of detachment the XD outperforms the SD by reducing the heat fluxes to the target and maintaining higher upstream temperatures, resulting in scrape-off layers that are more favorable for advanced tokamak operation. These advantages are attributed to the unique geometric characteristics of XD-poloidal flaring near the target.
机译:通过SOLPS仿真,证明了NSTX-U中的X偏滤器(XD)几何性能优于标准偏滤器(SD);特别是,它允许以较低的上游密度进行分离,并使目标附近的分离前沿稳定在远离主X点的位置。因此,稳定的分离操作成为可能-板附近的定位可在不降低核心等离子体的情况下大幅减少热通量。实际上,通过我们的仿真已确认,在相似的分离状态下,XD会通过降低流向目标的热通量并保持较高的上游温度来胜过SD,从而产生更有利于先进托卡马克运行的刮除层。这些优点归因于目标附近XD极向展开的独特几何特征。

著录项

  • 来源
    《Nuclear fusion》 |2018年第3期|036015.1-036015.6|共6页
  • 作者单位

    Institute for Fusion Studies, The University of Texas at Austin, Austin, TX, United States of America;

    Institute for Fusion Studies, The University of Texas at Austin, Austin, TX, United States of America;

    Institute for Fusion Studies, The University of Texas at Austin, Austin, TX, United States of America;

    Princeton Plasma Physics Laboratory, Princeton, NJ, United States of America;

  • 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

    X-divertor; detachment; NSTX-U; magnetic geometry; divertor;

    机译:X-偏滤器;分离;NSTX-U;磁性几何偏滤器;

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