椭圆弯晶谱仪波长判读误差分析
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摘要: 把影响椭圆弯晶谱仪波长判读误差的因素分为两种:一种是未通过椭圆前焦点的射线被理想椭圆晶面衍射时形成的误差; 另一种是只考虑晶体为非理想椭圆晶面形成的误差。分别对这两种模型进行了分析, 并通过数值计算给出狭缝对椭圆弯晶谱仪波长判读误差的影响关系。模拟的数据与其他人的实验结果吻合较好。Abstract: The errors of wavelength in elliptical crystal spectrometer are divided into two models:1) The target center is not on the focus of the ellipsoid, the target size can not be ignored, and the background scatters from any directons; 2) The X-ray is reflected from irregular crystal surface, which is not an ideal ellipsoid. The analysis of these two models are gvien and the relation between the wavelength errors and the aperture slit width are psented with digital calculation. The calculation data are agreeable to the experiments．
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Key words:
- crystal spectrometer /
- error analysis
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