X射线相衬成像法在线表征冷冻靶技术  

Characterization of cryogenic targets using X-ray phase contrast imaging

作　　者：刘元琼[1] 黎军[1] 王凯[1] 林伟[1] 马坤全[1] 雷海乐[1] 谢端[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2013年第3期620-626,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51006093)

摘　　要：阐述了冷冻靶类球面物体X射线相衬成像机理;Tracepro软件模拟研究证明了X射线相衬成像法能用于冷冻靶燃料层参数的表征;研制了在线表征冷冻靶的X射线相衬成像实验装置,利用该装置开展了二乙烯基苯泡沫球壳及实际氘氘冷冻靶的X射线相衬成像实验研究,获得了玻璃微球内氘氘冷冻层X射线相衬图像,成像分辨力达1.5μm;利用X射线相衬成像法可同时表征烧蚀球壳及冷冻燃料层,为惯性约束聚变实验提供冷冻靶参数。A brief review of X-ray phase contrast imaging theory for spherical objects is given. Using Tracepro, simulated X ray phase contrast images of SiO2/DD cryogenic capsules are produced. The ability of phase contrast enhanced X-ray imaging for characterization of cryogenic fuel layers inside ablator shells has been proven with the simulation result. X-ray phase contrast imaging equipment has been established for characterization of cryogenic targets, with which imaging experiments for low density divinyl benzene foam shells and SiO2/DD cryogenic capsules have been carried out, and phase contrast images of cryogenic DD fuel layers in SiO2 capsules are obtained, with a resolution up to 1. 5 μm. Ablator and cryogenic fuel layers can be simultaneously characterized by X ray phase contrast imaging.

关 键 词：X射线相衬成像 冷冻燃料层 表征 模拟 折射 

分 类 号：TG115.22[金属学及工艺—物理冶金]