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首页> 外文期刊>Fusion Science and Technology >Two-Gaussian Fitting Method for Charge Exchange Spectroscopy on Measurements of Ion Temperature and Toroidal Plasma Flow Velocity in the KSTAR Tokamak
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Two-Gaussian Fitting Method for Charge Exchange Spectroscopy on Measurements of Ion Temperature and Toroidal Plasma Flow Velocity in the KSTAR Tokamak

机译：用于电荷交换光谱对Kstar Tokamak中的离子温度和环形等离子体流速测量的两高斯拟合方法

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摘要

Charge exchange spectroscopy has been widely used in fusion devices to measure ion temperature, and toroidal and poloidal flow velocities of plasma. For local measurement, especially in the core region of the plasma, the spectrum emitted by the charge exchange reaction between the main plasma ions or impurity ions and the intentionally injected neutral beam should be analyzed so that parameters can be accurately deduced. Since the line-integrated spectrum signal through the line of sight of the diagnostic optics usually contains an unnecessary overlapped spectrum signal, referred to as the background signal, that typically originates from the plasma boundary region, a beam modulation technique is commonly applied to separate the background signal from the measured spectrum. Recently, it has been demonstrated in the KSTAR tokamak that a two-Gaussian fitting (TGF) method can be applied to analyze the spectrum and deduce plasma ion temperature and toroidal rotation velocity profiles of reasonable accuracy without beam modulation. It has been realized that the measurement result by the TGF method can be alternatively used to investigate plasma transport dynamics when beam modulation is prohibited to avoid any possible disturbance inhibiting robust plasma control and stable operation of the neutral beam injection system.
机译：电荷交换光谱已广泛用于融合装置中以测量离子温度，环形温度和血浆的环形流速。对于局部测量，特别是在等离子体的核心区域中，应分析由主等离子体离子或杂质离子和有意注射的中性光束之间的电荷交换反应发出的光谱，以便可以精确推导参数。由于通过诊断光学器件的视线的线路集成频谱信号通常包含不必要的重叠频谱信号，称为背景信号，其通常源自等离子体边界区域，常用光束调制技术以分离来自测量光谱的背景信号。最近，在KSTAR Tokamak中已经证明了一种双高斯拟合（TGF）方法来分析光谱并推导出可合理精度的等离子体离子温度和环形旋转速度谱，而无需光束调制。已经意识到，当禁止射线调制以避免任何可能的干扰抑制鲁棒等离子体控制和中性光束注射系统的稳定操作时，可以替代地用于研究等离子体传输动力学。

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  • 来源
    《Fusion Science and Technology》 |2020年第7期|787-794|共8页
  • 作者

    H. H. Lee; J. K Lee; W. H. Ko;

  • 作者单位

    National Fusion Research Institute;

    National Fusion Research Institute|Korea University of Science and Technology Department of Accelerator and Nuclear Fusion Physical Engineering;

    National Fusion Research Institute|Korea University of Science and Technology Department of Accelerator and Nuclear Fusion Physical Engineering;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Fitting analysis; charge exchange spectroscopy; fusion plasma;

    机译：拟合分析;电荷交换光谱;融合等离子体;

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