高能电子成像研究进展

Status and Progress of High Energy Electron Radiography

摘要: 本文通过蒙特卡罗程序EGS模拟研究了电子束与靶的相互作用，对成像束流光学进行了设计，并对束流匹配对空间分辨的影响、超快分束技术和产生横向均匀束技术等进行了模拟研究。实验验证了高能电子成像能达到μm量级的空间分辨，并可实现厚度、密度分辨及明-暗场成像等特点。同时给出了后续实验及研究计划，希望进一步提高高能电子成像性能并拓宽其应用领域。

Abstract: The interaction between electron beam and target was studied by code EGS simulation. The imaging lens optics was designed and the effect of beam matching on the spatial resolution, ultrafast beam split and transverse uniform beam generation were studied. Through experimental study, the micrometer spatial resolution of high energy electron radiography (HEER) was reached and it could achieve target thickness and density resolutions, and bright-dark field imaging. Furthermore, the future plan of HEER program was shown in order to further improve the HEER technology and extend the HEER application filed.