[20p-B205-1~15] 3.6 Laser processing (formerly 3.7)

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[20p-B205-12] Direct Observation of Femtosecond Laser-Driven Shock Compression in Copper

〇(M2)Naoya Egashira¹, Tomoki Matsuda¹, Takuo Okuchi², Yusuke Seto³, Yusuke Ito⁴, Takahisa Shobu⁵, Nobuhiko Nakanii⁶, Yuichi Inubushi⁷, Tadashi Togashi⁷, Kohei Miyanishi⁸, Tomokazu Sano¹ (1.Osaka Univ., 2.Kyoto Univ., 3.Osaka Metropolitan Univ., 4.The Univ. of Tokyo, 5.JAEA, 6.QST, 7.JASRI, 8.RIKEN)

Keywords:

Femtosecond Laser,XFEL,Shock Compression

A shock wave is driven by ablation when materials are irradiated with a femtosecond laser pulse. It has been confirmed that the femtosecond laser-driven shock wave induces the formation of unique microstructures such as dense lattice defects, high-pressure phases, and metastable phases in the material, which cannot be obtained by conventional shock compression methods. In order to understand this mechanism, we performed in-situ measurements on copper using an X-ray Free Electron Laser (XFEL) to clarify the lattice behavior during the initial stage of femtosecond laser-driven shock compression.