Japan Geoscience Union Meeting 2019

Presentation information

[E] Poster

P (Space and Planetary Sciences ) » P-CG Complex & General

[P-CG22] Shock responses of planetary materials elucidated from meteorites and dynamic compression experiments

Tue. May 28, 2019 10:45 AM - 12:15 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Toshimori Sekine(Center for High Pressure Science and Technology Advanced Research), Takuo Okuchi(Institute for Planetary Materials, Okayama University)

[PCG22-P02] Shock-compressed behavior
of quartz by XFEL

*Tomoko Sato1, Yoshinori Tange2, Yusuke Seto3, Toshimori Sekine4,5, Norimasa Ozaki4, Toyohito Nishikawa4, Kohei Miyanishi4, Kensuke Matsuoka4, Ryosuke Kodama4, Tadashi Togashi2, Yuichi Inubushi2, Toshinori Yabuuchi6, Makina Yabashi6 (1.Hiroshima University, 2.Japan Synchrotron Radiation Research Institute, 3.Kobe University, 4.Osaka University, 5.Center for High Pressure Science &Technology Advanced Research, 6.RIKEN)

Keywords:Shock compression, in-situ X-ray diffraction, quartz

We have conducted x-ray diffraction measurement (XRD) with femtosecond x-ray pulses generated by the x-ray free electron laser (XFEL) to observe lattice dynamics and phase transformation of single-crystal quartz under high strain-rate shock compression (~109 s-1) and high pressure. Single-crystal quartz samples were shock-compressed by high-power short- and long-pulse lasers. In the short-pulse experiments, the lattice was reduced to 15% and 1.5% in the direction parallel and perpendicular to the compression axis, respectively. The sample was uniaxially compressed over its known Hugoniot elastic limit. In the long-pulse experiments, three different states were observed. Polycrystalline stishovite appeared at first, and elastically compressed state and a topotaxially transformed new phase were observed successively.