Japan Geoscience Union Meeting 2021

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[J] Oral

S (Solid Earth Sciences ) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT21] Innovation through the Integration of Solid Earth Science and Materials Science

Thu. Jun 3, 2021 1:45 PM - 3:15 PM Ch.24 (Zoom Room 24)

convener:Kenji Kawai(Department of Earth and Planetary Science, School of Science, University of Tokyo), Jun Tsuchiya(Geodynamics Research Center, Ehime University), Ryuichi Nomura(Kyoto University), Satoshi Ohmura(Hiroshima Institute of Technology), Chairperson:Kenji Kawai(Department of Earth and Planetary Science, School of Science, University of Tokyo), Ryuichi Nomura(Kyoto University)

1:50 PM - 2:20 PM

[SIT21-02] Time-resolved transmission electron microscopy toward operando-measurement in geoscience

★Invited Papers

*Kuwahara Makoto1 (1.Nagoya University)

Keywords:operando measurement, transmission electron microscopy, material science

Time-resolved measurement in a transmission electron microscopy (TEM) holds promises of reveling intrinsic feature in nano-materials. Our group had developed time-resolved TEM (TR-TEM) using photocathode-type electron gun which could synchronize with time-structure of pulsed laser. The TR-TEM can provide a narrow energy width of below 0.3 eV and 1-ps pulse duration of electron beam. Furthermore, it has been clarified that the pulsed electron could contribute to observe time evolutions of electromagnetic field. High charge electron pulse in TRTEM also has possibility to realize operando-measurement of rock friction via nanosecond single-shot imaging, which can investigate rock friction at high sliding velocity and effect of ambient temperature, pressure, and pore pressure on friction. The technique will open to access nanometer-scale mechanics of faulting origin in geoscience. We would like to introduce overview of our apparatus and recent status of ultrafast measurement in electron microscopy.