为了实现球面晶体背光成像、验证球面晶体背光成像系统性能, 采用模拟软件SHADOW对该背光成像系统进行了模拟研究, 并对实际成像过程中影响系统成像的探测器位置、背光源的大小等参量进行了模拟分析。结果表明, 探测器位置的微小变化对成像系统的相对放大率影响较小; 背光源越小, 成像系统的空间分辨率越高。该成像系统具有很好的空间分辨率, 系统性能稳定可靠。

In order to realize the work of X-ray imaging system and testify the performance of the imaging system, the backlighting imaging system was studied by ray tracing simulation software SHADOW. By the simulation of system parameters(detection position, the size of backlighting source), the results show that the position of detection has a little influence on the relative magnification of the system. The spatial resolution of the X-ray imaging system is higher with the decrease of the size of backlighting source. The imaging system based on spherically bent crystal has high spatial resolution and better performance.