透射光栅衍射效率研究

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 ,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。

Study on Transimission Grating Diffraction Efficiencies

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.