We have developed an experimental setup for picosecond time-resolved X-ray shadowgraphy and applied it to observe laser ablation. X-rays are generated by femtosecond laser focusing on a tungsten target. The pulse duration of the generated X-rays is measured to be 33 ps. Using an optical delay system, a series of time-resolved shadowgraphs of a plasma plume, which is generated by laser ablation using 300 ps laser beam irradiation on an aluminum target, are clearly obtained by a single laser shot exposure.
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Hironaka et al. (1999) studied this question.
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