基于多层膜技术的硬X射线Laue透镜衍射效率的理论研究

采用耦合波理论分析了X射线在多层膜Laue透镜中的传播,选择Cu的Kα线作X射线光源,计算了多层膜Laue透镜的衍射效率.材料为WSi2/Si,最外层宽度为10 nm,深度为8 500 nm的多层膜Laue透镜,倾斜情况下外层区域局部光栅的衍射效率可达59%,理论上证明了多层膜Laue透镜是实现X射线聚焦的有效手段.

Diffraction Efficiency of Multilayer Based Laue Lens for Hard X ray Focusing

The transmission of X ray in Laue Lens is analyzed by the coupled wave theory.The diffraction efficiency of multilayer Laue Lens is calculated using Cu Kα line as the X ray source.For the WSi2/Si multilayer Laue Lens with the outmost layer width of 10 nm,and the depth of 8 500 nm,the diffraction efficiency of the local gratings in the outer area reaches 59% in the case of tilted.Multilayer Laue Lens is proved to be an effective focusing method theoretically.