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首页> 外文期刊>Nuclear fusion >Experimental observation of the transition between resistive ballooning modes and ion temperature gradient modes in the edge of the HL-2A tokamak
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Experimental observation of the transition between resistive ballooning modes and ion temperature gradient modes in the edge of the HL-2A tokamak

机译：HL-2A托卡马克边缘电阻膨胀模式与离子温度梯度模式之间过渡的实验观察

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摘要

The type of edge turbulence transition from resistive ballooning modes (RBM) to drift-type ion temperature gradient (ITG) modes has been observed in the gas puffing modulation experiments and also simulations at the HL-2A tokamak. The experimental evidence on RMB and ITG characteristics is given by Langmuir probe and Doppler reflectometry data. In the low temperature region (T_e < 80 eV), the variation of turbulence intensity is in phase with that of the parallel resistivity, consistent with RBM features. However, in the high temperature region (T_e > 80 eV), the turbulence intensity is enhanced with increasing temperature and reduction of the parallel resistivity, implying a drive by drift wave type ITG modes. By numerical simulations with drift resistive inertial ballooning model, the dependence of the growth rate on the electron temperature for the most unstable mode has been investigated based on experimental parameters. Both experiments and simulations have suggested that the dominating instability transits from RBMs in the low T_e regime to ITG modes in the high T_e regime.
机译：在吹气调制实验以及在HL-2A托卡马克上进行的模拟中，已经观察到了从湍流型离子温度梯度（ITG）模式转变为从电阻膨胀模式（RBM）到边缘湍流的类型。 Langmuir探针和多普勒反射仪数据提供了有关RMB和ITG特性的实验证据。在低温区域（T_e <80 eV），湍流强度的变化与平行电阻率的变化同相，这与RBM特征一致。但是，在高温区域（T_e> 80 eV），湍流强度随温度升高和并联电阻率的降低而增强，这意味着需要使用漂移波型ITG模式进行驱动。通过使用漂移电阻惯性膨胀模型进行数值模拟，基于实验参数研究了最不稳定模式下生长速率对电子温度的依赖性。实验和模拟都表明，主要的不稳定性从低T_e态的RBM过渡到高T_e态的ITG模式。

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  • 来源
    《Nuclear fusion》 |2018年第3期|036002.1-036002.8|共8页
  • 作者

    J.Q. Xu; Y. Xu; X.D. Peng; J. Cheng; W.L. Zhong; M. Jiang; Z.C. Yang; O. Pan; Liu; L.W. Yan; Z.H. Huang; Z.B. Shi; M. Xu; Q.W. Yang; X.T. Ding; X.R. Duan; Yong Liu; the HL-2A Team;

  • 作者单位

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

    Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People's Republic of China;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    Southwestern Institute of Physics, PO Box 432, Chengdu 610041, Sichuan, 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
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  • 关键词

    turbulence decorrelation time; resistive ballooning modes; ion temperature gradient modes; GAM; drift wave;

    机译：湍流去相关时间;电阻膨胀模式;离子温度梯度模式;GAM;漂移波;

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