Topics (报告题目): Ultrafast Electron Diffraction and Microscopy
Speakers (报告人): Associate Professor Dr. Jinfeng Yang (Nanoscience and Nanotechnology Center, Osaka University)
Date (时间): 2016年11月4日（周五）上午9:30 – 11:00
Place (地点): 北京大学加速器楼408室
Contact Person (联系人): 刘克新([email protected]), 黄森林([email protected])
Abstract (报告摘要):
An ultrafast detection technique on 100 fs time scales over sub-nanometer (even atomic) spatial dimensions has long been a goal for the scientists to reveal and understand the ultrafast structural-change induced dynamics in materials. At Osaka University, we constructed the first prototype of relativistic-energy femtosecond-pulse electron microscopy using a radio-frequency (RF) electron gun. We succeeded to observe excellent-quality electron diffraction patterns under the single-shot observation, and observed TEM imaging of polystyrene microparticles and Au nanoparticles using femtosecond electron pulses with the electron energy of 3.1 MeV.