• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nuclear fusion >Pre-ionization by AC Ohmic coil operation in the TST-2 spherical tokamak
【24h】

Pre-ionization by AC Ohmic coil operation in the TST-2 spherical tokamak

机译：在TST-2球形托卡马克中通过交流欧姆线圈操作进行预电离

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

AC Ohmic coil operation experiments with frequencies up to 10 kHz were performed on the TST-2 spherical tokamak device, and the pre-ionization process was studied in detail. The minimum loop voltage for pre-ionization was 0.4 V, which corresponds to 0.5 V m~(-1) at the inboard limiter. Dependences of growth rate and saturation level of the process on various parameters were obtained, and they are compared with a time-dependent 0-dimensional model based on Townsend avalanche and loss along field lines. Most of the dependences are reproduced qualitatively by the model, and quantitative differences are within a factor of several. However, the external vertical field dependence of the appearance time, which is defined as the time to observe a plasma, and the isotope effect cannot be reproduced by the model. An ambipolar diffusion state which is predicted theoretically but mitigated experimentally is discussed. It was found that secondary electron emission at the limiter surfaces is a candidate mechanism to mitigate the state.
机译：在TST-2球形托卡马克装置上进行了频率高达10 kHz的交流欧姆线圈操作实验，并详细研究了预电离过程。预电离的最小环路电压为0.4 V，相当于内侧限制器的0.5 V m〜（-1）。获得了该过程的增长率和饱和度对各种参数的依赖关系，并将它们与基于Townsend雪崩和沿线损失的时变0维模型进行了比较。该模型定性地再现了大多数依赖关系，并且数量差异在几分之一以内。然而，出现时间的外部垂直场依赖性，其被定义为观察等离子体的时间，并且同位素效应不能由模型再现。讨论了理论上预测但实验上可以缓解的双极性扩散态。发现限制器表面的二次电子发射是缓解状态的候选机制。

著录项

  • 来源
    《Nuclear fusion》 |2018年第1期|016012.1-016012.17|共17页
  • 作者

    A. Ejiri; Y. Takase; N. Tsujii; H. Togashi; H. Furui; T. Shinya; B. Roidl; M. Sonehara; S. Yajima; Y. Yoshida; H. Yamazaki; A. Kitayama; A. Sato; Y. Takei; Y. Tajiri; N. Matsumoto; O. Mitarai;

  • 作者单位

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    National Institutes for Quantum and Radiological Science and Technology, Rokkasho 039-3212, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    The University of Tokyo, Kashiwa 277-8561, Japan;

    Kyushu Tokai University, Kumamoto 862-8652, Japan;

  • 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

    pre-ionization; breakdown; spherical tokamak; AC Ohmic coil operation; Townsend avalanche; ambipolar diffusion;

    机译：预电离分解;球形托卡马克交流欧姆线圈运行;汤森（Townsend）雪崩;双极扩散;

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