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首页> 外文期刊>Nuclear fusion >Non-inductive plasma start-up experiments on the TST-2 spherical tokamak using waves in the lower-hybrid frequency range
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Non-inductive plasma start-up experiments on the TST-2 spherical tokamak using waves in the lower-hybrid frequency range

机译：使用较低混合频率范围内的波在TST-2球形托卡马克上进行非感应等离子体启动实验

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摘要

Non-inductive plasma current start-up and sustainment by waves in the lower-hybrid frequency range (200 MHz) have been studied on the TST-2 spherical tokamak (R_0 ≤ 0.38 m, a ≤ 0.25 m, B_(t0) ≤ 0.3 T, I_p ≤ 0.14 MA) using three types of antenna: the 11-element inductively-coupled combline antenna, the dielectric loaded 4-waveguide array antenna, and the 13-element capacitively-coupled combline (CCC) antenna. The maximum plasma currents of 15 kA, 10 kA and 16 kA were achieved, respectively. The highest current drive figure of merit η_(CD) = (n_e)I_pR/P_(RF) was achieved by the CCC antenna. The efficiency of current drive should improve by reducing prompt orbit losses of high energy electrons by operating at higher plasma current (to improve orbit confinement) and higher toroidal magnetic field (to improve wave accessibility to the plasma core), while keeping the density high enough (to avoid excessive acceleration of electrons), but under the 'density limit'.
机译：在TST-2球形托卡马克（R_0≤0.38 m，a≤0.25 m，B_（t0）≤0.3）上研究了低混合频率范围（200 MHz）中波的无感等离子体电流的启动和维持T，I_p≤0.14 MA）使用三种类型的天线：11元素电感耦合梳状线天线，介质加载的4波导阵列天线和13元素电容耦合梳状线（CCC）天线。分别实现了15 kA，10 kA和16 kA的最大等离子体电流。通过CCC天线可获得最高的电流驱动品质因数η_（CD）=（n_e）I_pR / P_（RF）。电流驱动的效率应通过在较高的等离子体电流（以改善轨道约束）和较高的环形磁场（以改善对等离子体核心的波可及性）下运行来减少高能电子的迅速轨道损失来提高， （以避免电子过度加速），但在“密度极限”之下。

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  • 来源
    《Nuclear fusion》 |2015年第7期|073003.1-073003.8|共8页
  • 作者

    T. Shinya; Y. Takase; T. Wakatsuki; A. Ejiri; H. Furui; J. Hiratsuka; K. Imamura; T. Inada; H. Kakuda; H. Kasahara; R. Kumazawa; C. Moeller; T. Mutoh; Y. Nagashima; K. Nakamura; A. Nakanishi; T. Oosako; K. Saito; T. Seki; M. Sonehara; H. Togashi; S. Tsuda; N. Tsujii; T. Yamaguchi;

  • 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;

    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 Institute for Fusion Science, Toki 509-5292, Japan;

    National Institute for Fusion Science, Toki 509-5292, Japan;

    General Atomics, San Diego, CA 92186, USA;

    National Institute for Fusion Science, Toki 509-5292, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, 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 Institute for Fusion Science, Toki 509-5292, Japan;

    National Institute for Fusion Science, Toki 509-5292, 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;

    机译：球形托卡马克下混合波非感应等离子体启动;

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