基于Ar分支比方法的光谱强度响应效率标定研究

利用Nd∶YAG激光器输出的1 064 nm激光在大气压环境中产生了Ar等离子体，测量了Ar等离子体的发射光谱，从Ar等离子体发射光谱中筛选出了来自Ar Ⅰ和Ar Ⅱ 15个上能级的35条跃迁谱线，基于分支比方法计算了光谱仪的辐射强度响应效率标定系数。此外，利用氘灯和卤钨灯标准光源，对光谱仪辐射强度响应效率进行了标定，得到了针对不同光栅的光谱仪的辐射效率标定系数。用分支比方法获得的辐射强度响应效率标定系数与标准光源得到辐射强度响应效率标定系数具有较好的一致性，其最大相对误差为5.4%。该研究的标定方法可以为一些大型聚变装置的光谱测量的在线标定提供借鉴和参考。

Relative Spectral Intensity Response Calibration of Spectrometers Using Ar Plasma Emission Branching Ratio Method

Ar plasma was produced by using 1 064 nm laser at atmospheric pressure, the emission spectrum was measured, and 35 Ar Ⅰ and Ar Ⅱ emission lines from the 15 upper levels were selected to make calibration for spectrometer response based on the branch ration method. In addition, the intensity response of the spectrometer was calibrated by using deuterium lamp and tungsten halogen standard light source. The calibration coefficients of intensity response for spectrometers with different gratings were obtained. The calibration coefficient of the intensity response obtained by the branch ratio method was in good agreement with that by the standard light source, and the maximum relative error is 5.4%. The calibration method in this paper can be used as a reference for the on-line calibration of spectral measurements in some large-scale fusion devices.