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Numerical characterization of plasma breakdown in reversed field pinches

机译：反向场收缩中等离子体击穿的数值表征

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摘要

In the reversed field pinch, there is considerable interest in investigating the plasma breakdown. Indeed, the plasma formed during the breakdown may have an influence on the confinement and maintenance in the latter process. However, up to now there has been no related work, experimentally or in simulation, regarding plasma breakdown in reversed field pinch (RFP). In order to figure out the physical mechanism behind plasma breakdown, the effects of the toroidal and error magnetic field, as well as the loop voltage have been studied. We find that the error magnetic field cannot be neglected even though it is quite small in the short plasma breakdown phase. As the toroidal magnetic field increases, the averaged electron energy is reduced after plasma breakdown is complete, which is disadvantageous for the latter process. In addition, unlike the voltage limits in the tokamak, loop voltages can be quite high because there are no requirements for superconductivity. Volt-second consumption has a small difference under different loop voltages. The breakdown delay still exists in various loop voltage cases, but it is much shorter compared to that in the tokamak case. In all, successful breakdowns are possible in the RFP under a fairly broad range of parameters.
机译：在反向场收缩中，对研究等离子体击穿有相当大的兴趣。实际上，在击穿期间形成的等离子体可能对后一过程中的限制和维持有影响。但是，到目前为止，在反向场收缩（RFP）中，关于等离子体击穿的实验或模拟尚无相关工作。为了弄清楚等离子体击穿背后的物理机理，研究了环形磁场和误差磁场以及环路电压的影响。我们发现，即使在短的等离子体击穿阶段中误差磁场很小，误差磁场也不能忽略。随着环形磁场的增加，等离子击穿完成后平均电子能量降低，这对于后一种工艺是不利的。此外，与托卡马克中的电压限制不同，环路电压可能会很高，因为不需要超导性。在不同的回路电压下，伏秒消耗具有很小的差异。击穿延迟在各种回路电压情况下仍然存在，但与托卡马克情况相比要短得多。总之，在相当广泛的参数范围内，RFP可能会成功分解。

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  • 来源
    《Nuclear fusion》 |2018年第2期|026007.1-026007.10|共10页
  • 作者

    Yanli Peng; Ya Zhang; Wenzhe Mao; Zhoujun Yang; Xiwei Hu; Wei Jiang;

  • 作者单位

    School of Physics and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China;

    School of Science, Wuhan University of Technology, Wuhan 430070, People's Republic of China;

    KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China;

    School of Physics and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China;

    School of Physics and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China;

    School of Physics and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, 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

    reversed field pinch; plasma breakdown; particle-in-cell/Monte Carlo;

    机译：反向场收缩等离子体击穿细胞内颗粒/蒙特卡罗;

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