讲座题目：Ultrafast electronic and structural dynamics study by x-ray free electron lasers 主讲人：Kiyoshi Ueda 教授 主持人：吴健 教授 开始时间：2019-10-10 10:30:00 讲座地址：理科大楼A228会议室 主办单位🛐：物理与电子科学学院
报告人简介🛬： Degrees: B. A., Kyoto University Japan, March 1977 Ph. D., Kyoto University, Japan, March 1982 Professional carriers: Research Associate, Tohoku University, Japan, April 1982 - May 1990 Associate Professor, Tohoku University, Japan, June 1990 - March 2003 Full Professor, Tohoku University, April 2003 - Presen 报告内容： X-ray Free Electron Lasers (XFELs) deliver coherent x-ray pulses, combining unprecedented power densities of up to 1020W/cm2 and extremely short pulse durations down to hundreds of attoseconds. Such intense XFEL pulses make single-shot diffraction of nanometer-size objects, tiny protein crystals, and non-crystalized biomolecules a tangible reality. Such ultrashort XFEL pulses allow us also to visualize temporal variations of charge and structure in femto- to attoseconds time scales, which may occur upon photoexcitation/photoionization in any form of matter. Also, since the XFEL pulses give access to a new regime of x-ray intensities, they open new venues in studying the interaction between intense X-rays and various forms of matter. Understanding the ultrafast reactions induced by the XFEL pulses is of fundamental interest, as well as of crucial importance, for XFEL applications. The present talk will sketch the current status of science studied with XFELs and describe its future directions, referring to the recent developments at various facilities. |
