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首页> 外文期刊>Nuclear fusion >First evidence of dominant influence of E × B drifts on plasma cooling in an advanced slot divertor for tokamak power exhaust
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First evidence of dominant influence of E × B drifts on plasma cooling in an advanced slot divertor for tokamak power exhaust

机译：首相e×b主导影响的证据漂移对托卡马克功率排气的先进槽位偏转器中的等离子体冷却

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摘要

Addressing power exhaust in tokamaks is presently recognized as one of the major remaining open issues for the development of fusion reactors. At the forefront of this endeavor is the effort to develop an advanced divertor by maximizing dissipation of plasma power and momentum inside the divertor. Here, we demonstrate, for the first time, that the electromagnetic (E × B) drifts exert a key influence on plasma and gas dynamics in a new advanced slot divertor in the DⅢ-D tokamak, named the small angle slot (SAS). SAS leverages the effect of drifts to achieve a highly dissipative divertor with electron temperature T_e ≤ 10 eV over a wide range of plasma densities, for ion B ×▽B away from the divertor, as used for advanced tokamak operation on DⅢ-D. Modeling with the SOLPS-ITER code shows that for this drift direction, the E × B flow carries particles toward the outer common flux region (CFR) via the private flux region (PFR), reinforcing neutral recycling and enhancing divertor dissipation. In contrast, for the opposite field direction, the E × B flow carries particles away from the outer CFR into the PFR, offsetting the anticipated SAS geometric effects. This finding is an important step in the understanding of the behavior of advanced divertors for achieving a power exhaust solution for fusion reactors.
机译：托克马克斯的寻址功率排气目前被认为是融合反应堆发展的主要剩余开放问题之一。在这一努力的最前沿是通过最大化偏移量的散热和偏移体内的动量来开发先进的偏转器的努力。在这里，我们首次证明电磁（E×B）漂移对DⅢ-D Tokamak中的新的高级槽隅ter在DⅢ-D托卡马克中的等离子体和气体动力学对等离子体和气体动力学的关键影响，命名为小角度槽（SAS）。 SAS利用漂移的效果在宽范围的等离子体密度下，在各种等离子体密度范围内实现高度耗散的偏移器，用于远离偏移器的离子B×△B，用于DⅢ-D的高级托卡马克操作。利用SolpS-ITER代码建模显示，对于该漂移方向，E×B流通过私有磁通区（PFR）朝向外公共通量区域（CFR）呈颗粒，加强空档再循环和增强偏移器耗散。相反，对于相反的场方向，E×B流量将颗粒从外部CFR携带到PFR中，偏移预期的SAS几何效果。这一发现是了解高级偏移器的行为来实现用于实现融合反应器的动力排气解决方案的重要步骤。

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  • 来源
    《Nuclear fusion》 |2021年第5期|054002.1-054002.6|共6页
  • 作者

    X. Ma; H.Q. Wang; H.Y. Guo; P.C. Stangeby; E.T. Meier; M.W. Shafer; D.M. Thomas;

  • 作者单位

    Oak Ridge Associated Universities 100 ORAU way Oak Ridge TN 37830 United States of America;

    General Atomics PO Box 85608 San Diego CA 92186-5608 United States of America;

    General Atomics PO Box 85608 San Diego CA 92186-5608 United States of America;

    University of Toronto 4925 Dufferin Street Toronto M3H 5T6 Canada;

    University of Washington 1 Brookings Dr St. Louis MO 63130 United States of America;

    Oak Ridge National Laboratory PO Box 2008 Oak Ridge TN 37831 United States of America;

    General Atomics PO Box 85608 San Diego CA 92186-5608 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

    tokamak; advanced divertor; drifts; SOLPS-ITER;

    机译：托卡马克;先进的偏移者;漂移;solps-erter.;

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