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 p.m. Ablator and cryogenic fuel layers can be simultaneously characterized by X-ray phase contrast imaging.
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