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Plasma current start-up experiments using outboard- and top-launch lower hybrid wave on the TST-2 spherical tokamak

机译:在TST-2球形托卡马克上使用舷外发射和顶部发射的下部混合波的等离子体电流启动实验

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摘要

Non-inductive plasma current start-up experiments were performed using the lower hybrid wave (LHW) on the TST-2 spherical tokamak. The density limit, observed in previous experiments using the outboard-launch antenna, disappeared after changing the plasma condition in the scrape-off layer, and the plasma current reached about 20 kA. In order to improve the LHW power deposition in the plasma core through an up-shift of the parallel wavenumber during the first pass through the plasma, a new top-launch antenna was designed, fabricated and installed. The plasma current ramp-up to 12 kA was achieved using the top-launch antenna alone in a preliminary experiment. Ray-tracing calculations using the measured plasma parameters showed a large up-shift during the first pass, satisfying the strong electron Landau damping condition in the plasma core.
机译:在TST-2球形托卡马克上使用下部混合波(LHW)进行了非感应等离子体电流启动实验。在以前的实验中,使用舷外发射天线观察到的密度极限在改变刮除层中的等离子体条件后消失,等离子体电流达到约20 kA。为了通过在第一次穿过等离子体过程中平行波数的上移来改善等离子体核心中的LHW功率沉积,设计,制造和安装了新的顶部发射天线。在初步实验中,仅使用顶部发射天线即可将等离子体电流提升至12 kA。使用测得的等离子体参数进行的射线追踪计算显示,在第一次扫描过程中出现了较大的上移,满足了等离子体核心中强电子Landau阻尼的条件。

著录项

  • 来源
    《Nuclear fusion》 |2017年第3期|036006.1-036006.8|共8页
  • 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;

    General Atomics, San Diego, CA 92186, USA;

    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;

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

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

    The University of Tokyo, Kashiwa 277-8561, 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

    spherical tokamak; lower hybrid wave; non-inductive plasma start-up; top-launch;

    机译:球形托卡马克下混合波非感应等离子体启动;首发;

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