介绍了同步辐射双晶单色器第1晶体热负载的情况,分析了热变形的原因,尝试了用光学追迹的SHADOW软件计算同步光在晶面上的能量分布,并用有限元方法模拟分析了底冷式和曲顶槽式两种水冷结构。结果表明,两种水冷却结构均能有效降低晶体表面的温升,减小变形量,其投角的变化小于投角调节精度(1μrad),其中曲顶槽型结构效果更佳,可用于晶体表面热功率密度约为1.0W/mm2的场合。 The thermal load of the first crystal of the synchrotron twin-crystal monochromator is introduced. The reason of the thermal deformation is analyzed. The energy distribution of the synchrotron light on the crystal plane is calculated by SHADOW software, and the finite element method The end of the cold and curved roof trough two kinds of water-cooled structure. The results show that both water cooling structures can effectively reduce the temperature rise of the crystal surface, reduce the deformation, and the variation of the throw angle is less than the adjusting accuracy of the throwing angle (1μrad). The curved roof structure is more effective and can be used for crystal Surface thermal power density of about 1.0W / mm2 occasions.