578 / 2019-03-20 20:30:11

X-ray point-projection backlight radiography at the picosecond petawatt laser facilities

X-ray backlight, picosecond petawatt laser

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High resolution point-projection backlight radiography of high flux X-rays produced by picosecond petawatt lasers is an important diagnostic technique for the inertial confinement fusion and other high energy density physics. Short pulse X-rays were generated in the interactions of Au micro-wire targets with picosecond petawatt laser beams on both the Xingguang-III laser facility and Shenguang-II upgrade laser facility. The spectrum, conversion efficiency and resolution of the X-ray backlights were characterized in the experiments. The backlight radiography was successfully applied to obtain the images of the compressed fuel of inertial confinement fusion targets, and the ejecta of shock-loaded materials.