球面弯晶的背光成像特性

Character of backlight imaging based on spherically bent crystal

通过对球面弯晶背光成像系统的分析,获得了空间分辨率、能量分辨率等关键性能参数随成像系统设计参数变化的关系。利用这一关系对背光成像系统的不同成像方式应用进行分析,并用光路追踪模拟进行验证。在此基础上,利用X射线衍射仪开展了单能成像系统的成像演示实验,获得与模拟和数值分析一致的结果。通过对成像系统的设计优化,这种高分辨单能成像技术将能够在神光激光装置上开展的物理实验中获得广泛应用。

By analyzing the monochromatic X-ray backlighting system with spherically bent crystal, the expressions for the spatial resolution and the spectral resolution of this system are deduced, and the relationship between these key performance pa rameters and the design parameters of the system is analyzed. Analysis results of the imaging system with different imaging mo dalities are obtained, which coincide with the ray tracing results. A demo test of the monochromatic imaging system was operated on the X-ray source, and the results are consonant with the simulation and the calculation. This diagnosis could have a broad pros pect of application in the measurements on Shenguang laser facility.