Characterization of inertial confinement fusion targets using X-ray phase contrast imaging

The X-ray in-line phase contrast imaging system based on the mircofocus X-ray source is developed for characterizing the inertial confinement fusion (ICF) targets. The influence of various factors such as the source-to-object distance and the object-to-scintillator distance on the image resolution and contrast is investigated experimentally. The best resolution of the system is tested to be about 1 μm. The wall thickness and the inner surface roughness of plastic targets are measured by the phase contrast imaging with the resolution of 1.3 μm. Moreover, by means of a closed-cycle cryostat with the lowest temperature of 13 K, the condensation of deuterium (D2) in glass shell is in-situ characterized with the resolution up to 1.5 μm.