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Effect of plasmoids on nonlinear evolution of double tearing modes

机译：等离子体对双撕裂模式非线性演化的影响

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摘要

The nonlinear evolution of the double tearing mode is numerically investigated in 2D geometry. Long and thin current sheets are found to be formed and become tearing unstable in the high Lundquist number regime during the fast reconnection phase, leading to the onset of the secondary and tertiary islands (plasmoids). Eventually the system saturates at a quasi-stationary state with those islands coexisting in two pairs. Interestingly, a new evolution process, characterized by two fast reconnection phases, is also discovered for an intermediate distance between the two resonant surfaces due to the evolution of current ribbons associated with the secondary island. These results are obtained only when the symmetry of magnetic configuration is strictly guaranteed in numerical calculations.
机译：在二维几何中，对双撕裂模式的非线性演化进行了数值研究。发现在快速重新连接阶段中，在高伦德斯特数态下会形成长而薄的电流层，并且撕裂不稳定，从而导致第二岛和第三岛（等离子体）的出现。最终，系统在准平稳状态下饱和，这些孤岛成对地成对存在。有趣的是，由于与次级岛相关联的电流带的发展，还发现了针对两个谐振表面之间的中间距离的，以两个快速重新连接阶段为特征的新的发展过程。只有在数值计算中严格保证磁性配置的对称性时才能获得这些结果。

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  • 来源
    《Nuclear fusion》 |2017年第12期|72-79|共8页
  • 作者

    J. Ma; W. Guo; Z. Yu; Q. Yu;

  • 作者单位

    Institute of Plasma Physics, Chinese Academy of sciences, Hefei 230031, People's Republic of China,Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of sciences, Hefei 230031, People's Republic of China,Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of sciences, Hefei 230031, People's Republic of China,Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    Max-Planck-Institut fur Plasmaphysik, 85748 Garching, Germany;

  • 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

    plasmoids; double tearing mode; magnetic reconnection; MHD instabilities;

    机译：电浆双撕裂模式磁连接;MHD不稳定性;

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