Challenge of electron crystallography using relativistic femtosecond electron pulses

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13687
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Osaka University
• Principal Investigator: Yang Jinfeng 大阪大学, 産業科学研究所, 准教授 (90362631)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 超高速電子回折 / フェムト秒電子線パルス / 結晶構造解析 / 高周波電子銃

Outline of Final Research Achievements

We have succeeded to develop a femtosecond time-resolved electron diffractometer using high-brightness 100-fs electron pulses at an energy of 3.1 MeV generated by a radio-frequency acceleration-based photoemission gun. Using the diffractometer, we obtained high-quality diffraction images from single gold crystals and Mica crystals with a single shot. The measurements were successful in facilitating the detection of higher-order diffraction patterns with a scattering vector up to 1.47/A and an excellent spatial resolution of 0.02/A. The demonstration indicates that our relativistic ultrafast electron diffractometer is applied to facilitate the study of ultrafast structural dynamics of reversible and irreversible processes in organic/inorganic molecules and protein materials at the femtosecond time-scale.

Free Research Field

加速器科学、電子顕微鏡、ビーム物理