日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 P (宇宙惑星科学) » P-CG 宇宙惑星科学複合領域・一般

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

2019年5月28日(火) 10:45 〜 12:15 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:関根 利守(Center for High Pressure Science and Technology Advanced Research)、奥地 拓生(岡山大学惑星物質研究所)

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

*佐藤 友子1丹下 慶範2瀬戸 雄介3関根 利守4,5尾崎 典雅4西川 豊人4宮西 宏併4松岡 健之4兒玉 了祐4富樫 格2犬伏 雄一2籔内 俊毅6矢橋 牧名6 (1.広島大学、2.高輝度光科学研究センター、3.神戸大学、4.大阪大学、5.北京高压科学研究中心、6.理化学研究所)

キーワード: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.