Femto-second time resolved observation of post-spinel transition using X-ray free electron laser

2016 Fiscal Year Final Research Report

• Project/Area Number: 25707041
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Japan Synchrotron Radiation Research Institute (2014-2016); Ehime University (2013)
• Principal Investigator: Tange Yoshinori 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 研究員 (70543164)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: X線自由電子レーザー / レーザー衝撃圧縮実験 / 高速時分割測定 / X線回折測定 / コランダム

Outline of Final Research Achievements

Ultrafast time resolved in situ X-ray diffraction measurements for shock-compressed materials were carried out by using an X-ray free electron laser. Laser-induced shock compression experiments were conducted using 3-ns pulse width high-power pump laser, and in situ observation measurements were carried out using 10-fs pulse width XFEL probe. A time series variation in lattice parameters and nano-crystallization of polycrystalline corundum was observed for 10 ns during shock-wave propagation. This result sheds light on our understanding elastovisco-plastic transition, nano-crystallization, and micro futures in brittle materials.

Free Research Field

高圧地球科学