In inertial confinement fusion (ICF) research, there are several ignition schemes. Double-shell target is one of the attractive approachs, which has a series of advantages, such as the use of noncryogenic deuterium–tritium (DT) fuel, more robust shock timing, a lower ignition temperature threshold, and a relatively low convergence. In the process of double-shell target fabrication, the outer shell is generally made up of two hemispherical shells, and a joint gap will be formed, which may have an important impact on implosion performance. We propose to study the effect of the joint feature by X-ray radiography using micro-sized high-energy X-rays generated by a picosecond laser. The X-ray backlighter is about 10 microns in size and lasts for tens of picoseconds, so it can achieve high temporal and spatial resolution. The radiographic images of the inner shell of the double-shell target at different times were successfully obtained, which clearly showed the influence of the joint feature of the outer shell. Based on the backlight photographic image, the areal density distribution of the target is analyzed. Using the experimental parameters, the radiation hydrodynamics simulation is carried out, and the structure similar to the experimental results is observed.

double shell,X-ray radiography,Indirect-drive