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Transient process of a spherical tokamak plasma startup by electron cyclotron waves

机译：电子回旋波激发球形托卡马克等离子体的瞬态过程

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摘要

Non-inductive startup by a 2.45 GHz microwave through electron cyclotron resonance heating (ECRH) has been studied in the SUNIST spherical tokamak (R/a: 0.3 m/0.23 m; Bjo : < 0.15 T). Two types of discharges, with quite different transient characteristics, were found. The transient processes of discharges are experimentally investigated by scanning the radial position of the ECR layer, the vertical magnetic field and the microwave power. Time domain analysis of microwave reflections and H_α emissions reveal a process dominated by the combination of ionization, loss along the open field lines and the gradient B drift. It is shown that the transient character is insensitive to the experimental parameters except the pressure of filled gas. This result confirms that the control of gas puffing is of great importance for starting up a spherical tokamak by ECRH using low-frequency microwaves.
机译：在SUNIST球形托卡马克（R / a：0.3 m / 0.23 m; Bjo：<0.15 T）中，已经研究了通过电子回旋共振加热（ECRH）通过2.45 GHz微波进行的非感应启动。发现了两种类型的放电，它们具有非常不同的瞬态特性。通过扫描ECR层的径向位置，垂直磁场和微波功率，对放电的瞬态过程进行了实验研究。微波反射和H_α发射的时域分析揭示了一个过程，该过程由电离，沿开放磁场线的损耗和梯度B漂移的组合所主导。结果表明，除了填充气体的压力外，瞬态特性对实验参数不敏感。该结果证实，对于使用低频微波通过ECRH启动球形托卡马克，控制气体的膨胀非常重要。

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  • 来源
    《Nuclear fusion》 |2011年第6期|p.23.1-23.8|共8页
  • 作者

    Y. Tan; Z. Gao; L. Wang; W.H. Wang; L.F Xie; X.Z. Yang; C.H. Feng;

  • 作者单位

    Department of Engineering Physics, Tsinghua University, Beijing,People's Republic of China;

    Department of Engineering Physics, Tsinghua University, Beijing,People's Republic of China;

    Institute of Physics, Chinese Academy of Sciences, Beijing, People's Republic of China;

    Department of Engineering Physics, Tsinghua University, Beijing,People's Republic of China;

    Department of Engineering Physics, Tsinghua University, Beijing,People's Republic of China;

    Institute of Physics, Chinese Academy of Sciences, Beijing, People's Republic of China;

    Institute of Physics, Chinese Academy of Sciences, Beijing, 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);
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