• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nuclear fusion >Disruption mitigation with high-pressure helium gas injection on EAST tokamak
【24h】

Disruption mitigation with high-pressure helium gas injection on EAST tokamak

机译：在EAST托卡马克上注入高压氦气缓解破裂

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High pressure noble gas injection is a promising technique to mitigate the effect of disruptions in tokamaks. In this paper, results of mitigation experiments with low-Z massive gas injection (helium) on the EAST tokamak are reported. A fast valve has been developed and successfully implemented on EAST, with valve response time ≤150 μs, capable of injecting up to 7 × 10~(22) particles, corresponding to 300 times the plasma inventory. Different amounts of helium gas were injected into stable plasmas in the preliminary experiments. It is seen that a small amount of helium gas (N_(He) ≃ N_(plasma)) can not terminate a discharge, but can trigger MHD activity. Injection of 40 times the plasma inventory impurity (N_(He) ≃ 40 × N_(plasma)) can effectively radiate away part of the thermal energy and make the electron density increase rapidly. The mitigation result is that the current quench time and vertical displacement can both be reduced significantly, without resulting in significantly higher loop voltage. This also reduces the risk of runaway electron generation. As the amount of injected impurity gas increases, the gas penetration time decreases slowly and asymptotes to (~7 ms). In addition, the impurity gas jet has also been injected into VDEs, which are more challenging to mitigate that stable plasmas.
机译：高压稀有气体注入是减轻托卡马克中断影响的有前途的技术。本文报道了在EAST托卡马克上进行低Z量气体注入（氦气）的缓解实验的结果。已经开发出一种快速阀，并在EAST上成功实施，阀响应时间≤150μs，能够注入多达7×10〜（22）的颗粒，相当于血浆存量的300倍。在初步实验中，将不同数量的氦气注入稳定的等离子体中。可以看出，少量的氦气（N_（He）≃N_（plasma））不能终止放电，但可以触发MHD活性。注入40倍于等离子体存量杂质（N_（He）≃40×N_（plasma））可以有效地散发一部分热能，并使电子密度迅速增加。缓解的结果是，电流淬火时间和垂直位移都可以显着降低，而不会导致明显更高的环路电压。这也降低了电子失控产生的风险。随着注入的杂质气体量的增加，气体渗透时间会缓慢降低，并且渐近达到（〜7 ms）。此外，杂质气体射流也已注入VDE，这对于减轻这种稳定的等离子体更具挑战性。

著录项

  • 来源
    《Nuclear fusion》 |2018年第3期|036003.1-036003.7|共7页
  • 作者

    D.L. Chen; B. Shen; R.S. Granetz; J.P. Qian; H.D. Zhuang; L. Zeng; Y. Duan; T. Shi; H. Wang; Y. Sun; B.J. Xiao;

  • 作者单位

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    MIT Plasma Science and Fusion Center, Cambridge, MA 02139, United States of America;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, People's Republic of China,School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230031, 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

    disruption mitigation; Halo current; VDE; radiation power;

    机译：缓解干扰;晕电流VDE;辐射功率;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号