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本文介绍了基于托卡马克等离子体被动光谱诊断获得杂质密度的方法。通过被动光谱诊断测量获得杂质线辐射的空间多道弦积分强度分布,利用强度标定系数转换为绝对光亮度分布;通过测量弦与等离子体位形,将弦积分的强度分布反演变换为径向体发射率。根据线辐射强度激发截面求出对应电离态的离子密度,最后采用杂质输运程序模拟计算得出总密度分布。以东方超环(Experimental Advanced Superconducting Tokamak,EAST)托卡马克装置上软X射线-极紫外光谱(Soft X-ray and Extreme Ultraviolet Spectrometers,XEUV)诊断测量到的Mo XXIX-Mo XXXII为例,描叙了获得Mo杂质密度分布的过程,获得的总误差小于10%。
This paper presents a method for obtaining impurity density based on the passive spectroscopy of tokamak plasma. The spatial multistring integral intensity distribution of impurity radiation is obtained by passive spectral diagnosis and measurement, and the intensity distribution coefficient is converted to the absolute brightness distribution by measuring the chord and plasma shape. The intensity distribution of the chord integral is inversely transformed into the radial body Emissivity. According to the radiation intensity of the line, the ion density of the corresponding ionization state is obtained. Finally, the total density distribution is calculated by the impurity transport program simulation. The case of Mo XXIX-Mo XXXII measured by Soft X-ray and Extreme Ultraviolet Spectrometers (XEUV) on the Experimental Tokomak Tokatomo-tokamak Tokamak (EAST) To obtain the density distribution of Mo impurities, the total error obtained is less than 10%.