透射光栅衍射效率研究
Study on Transmission Grating Diffraction Efficiencies
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摘要: 透射光栅广泛应用于X光能谱测量，为获得定量的X光能谱，必须对透射光栅的衍射效率进行研究。首先在北京同步辐射源上对透射光栅的衍射效率在多个入射X光能量点进行了实验标定，获得了透射光栅衍射效率的实验结果。为模拟透射光栅衍射效率实验标定结果，发展了一个新的透射光栅衍射效率计算模型，该模型不同于国外已发展的矩形栅线模型和梯形栅线截面模型，而是假设透射光栅栅线具有准梯形截面。模型计算结果与实验标定结果符合很好。Abstract: Transmission grating efficiencies for soft x rays at several photon energies were calibrated on Beijing Synchrotron Radiation Facility, and the experimental results have been obtained. Then, a new model was developed to simulate the calibrated grating efficiencies, which the grating wires were assumed to have quasi-trapezoidal cross sections. Model calculations are in good agreement with the experimental results.
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Key words:
- transmission grating /
- diffraction efficiency /
- experimental calibration /
- grating model
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