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Destabilization of the internal kink mode by energetic electrons on the HL-2A tokamak

机译：HL-2A托卡马克上的高能电子使内部扭结模式不稳定

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摘要

A strong burst of the internal kink mode has been observed during ECRH on the HL-2A. It has been experimentally identified that the energetic electrons, which deviate from Maxwell velocity distribution, excite the mode, which was a so-called electron fishbone (e-fishbone). The energy distribution of the electrons is indirectly measured by a hard x-ray detector (CdTe) with the pulse height analysis. When the counts of the energetic electrons with 35-70 keV increase to a higher level, the mode can be obviously observed. The e-fishbone can be excited during off-axis ECRH deposited on both the high field side and the low field side. The modes propagate toroidally parallel to the precession velocity of deeply trapped ions which is in the same direction as the plasma current (co-current) and poloidally parallel to the electron diamagnetic drift velocity. In order to further identify with the e-fishbone mode, the resonance condition of the wave-particle has been investigated. Comparing with experimental results, the calculation analyses show that the mode frequency is close to the precession frequency of the barely trapped electrons or barely circulating electrons when the magnetic shear is very weak or negative.
机译：在HL-2A的ECRH期间，观察到内部扭结模式的强烈爆发。实验上已经发现，偏离麦克斯韦速度分布的高能电子激发该模式，这就是所谓的电子鱼骨（e-fishbone）。电子的能量分布由硬X射线检测器（CdTe）通过脉冲高度分析间接测量。当具有35-70 keV的高能电子的数量增加到更高的水平时，可以明显观察到该模式。在沉积在高场侧和低场侧的离轴ECRH期间，可以激发电子鱼骨。这些模式与深陷离子的进动速度平行地呈环形传播，其与等离子体电流（并流）的方向相同，而与电子反磁漂移速度则在极性上平行。为了进一步识别电子鱼骨模式，已经研究了波粒的共振条件。与实验结果比较，计算分析表明，当磁切变非常弱或为负值时，模态频率接近于几乎没有被俘获的电子或几乎没有循环的电子的进动频率。

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  • 来源
    《Nuclear fusion》 |2009年第7期|75022.1-75022.6|共6页
  • 作者

    W. Chen; X.T. Ding; Yi. Liu; G.L. Yuan; Y.P. Zhang; Y.B. Dong; X.Y. Song; J. Zhou; X.M. Song; W. Deng; Q.W. Yang; X.Q. Ji; X.R. Duan; Y. Liu;

  • 作者单位

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, PO Box 432 Chengdu 610041, 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

    macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, rayleigh-taylor, etc.); tokamaks, spherical tokamaks; fusion products effects (e.g., alpha-particles, etc.), fast particle effects; ideal and resistive MHD modes; kinetic modes;

    机译：宏观不稳定性（水磁;例如扭结;消防水带;镜子;气球;撕裂;被困粒子;长笛;瑞利泰勒等）;托卡马克;球形托卡马克;融合产物效应（例如;α粒子等）;快速粒子效应;理想和电阻MHD模式;动力学模式;

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