Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People's Republic of China.
Accelerator Division, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People's Republic of China.
J Synchrotron Radiat. 2019 Nov 1;26(Pt 6):2075-2080. doi: 10.1107/S1600577519012724. Epub 2019 Oct 22.
The upgrade of the laser pump time-resolved X-ray probes, namely time-resolved X-ray absorption spectroscopy (TR-XAS) and X-ray diffraction (TR-XRD), implemented at the Beijing Synchrotron Radiation Facility, is described. The improvements include a superbunch fill, a high-efficiency fluorescence collection, an efficient spatial overlap protocol and a new data-acquisition scheme. After upgrade, the adequate TR-XAS signal is now obtained in a 0.3 mM solution, compared with a 6 mM solution in our previous report. Furthermore, to extend application in photophysics, the TR-XAS probe is applied on SrCoO thin film. And for the first time, TR-XAS is combined with TR-XRD to simultaneously detect the kinetic trace of structural changes in thin film.
本文描述了在北京同步辐射设施上进行的激光泵浦时间分辨 X 射线探针的升级，即时间分辨 X 射线吸收谱（TR-XAS）和 X 射线衍射（TR-XRD）。改进包括超短脉冲填充、高效荧光收集、有效的空间重叠协议和新的数据采集方案。升级后，现在在 0.3mM 溶液中即可获得足够的 TR-XAS 信号，而在我们之前的报告中则需要 6mM 溶液。此外，为了将其应用扩展到光物理领域，TR-XAS 探针被应用于 SrCoO 薄膜。并且首次将 TR-XAS 与 TR-XRD 结合，同时检测薄膜中结构变化的动力学轨迹。
