【摘 要】
：
Based on a femtosecond laser plasma-induced hard x-ray source with a high laser pulse energy (＞ 100 m J) at 10 Hz repetition rate,we present a time-resolved x-ray diffraction system on an ultrafast time scale.The laser intensity is at relativistic regime
【机 构】
：
Beijing National Laboratory of Condensed Matter Physics,Institute of Physics,Chinese Academy of Scie
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Based on a femtosecond laser plasma-induced hard x-ray source with a high laser pulse energy (＞ 100 m J) at 10 Hz repetition rate,we present a time-resolved x-ray diffraction system on an ultrafast time scale.The laser intensity is at relativistic regime (2 × 1019 W/cm2),which is essential for effectively generating Kα source in high-Z metal material.The produced copper Kα radiation yield reaches to 2.5 × 108 photons/sr/shot.The multilayer mirrors are optimized for monochromatizating and two-dimensional beam shaping of Kα emission.Our experiment exhibits its ability of monitoring the transient structural changes in a thin film SrCoO2.5 crystal.It is demonstrated that this facility is a powerful tool to perform dynamic studies on samples and adaptable to the specific needs for different particular applications with high flexibility.
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