Norimasa Ozaki

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The understanding of fracture phenomena of a material at extremely high strain rates is a key issue for a wide variety of scientific research ranging from applied science and technological developments to fundamental science such as laser-matter interaction and geology. Despite its interest, its study relies on a fine multiscale description, in between the(More)
Investigation of the iron phase diagram under high pressure and temperature is crucial for the determination of the composition of the cores of rocky planets and for better understanding the generation of planetary magnetic fields. Here we present X-ray diffraction results from laser-driven shock-compressed single-crystal and polycrystalline iron,(More)
Here, we report, that by means of direct irradiation of lithium fluoride a (LiF) crystal, in situ 3D visualization of the SACLA XFEL focused beam profile along the propagation direction is realized, including propagation inside photoluminescence solid matter. High sensitivity and large dynamic range of the LiF crystal detector allowed measurements of the(More)
IMPACTS USING A LASER-DRIVEN LAUNCHER. S. Sugita, K. Kurosawa, T. Kadono, Y. Hironaka, K. Otani, A. Shiroshita, N. Ozaki, K. Miyanishi,Y. Sekine, K. Nakamura, S. Fukuzaki, T. Sano, T. Sakaiya, T. Fujiwara, T. Mochiyama, K. Takarada, S. Fujioka, K. Shigemori, S. Ohno, S. Tachibana, and T. Matsui, Dept. of Complexity Sci. & Eng., Univ. of Tokyo (Kashiwa,(More)
Forsterite (Mg2SiO4) is one of the major planetary materials, and its behavior under extreme conditions is important to understand the interior structure of large planets, such as super-Earths, and large-scale planetary impact events. Previous shock compression measurements of forsterite indicate that it may melt below 200 GPa, but these measurements did(More)
Materials at high pressures and temperatures are of great current interest for warm dense matter physics, planetary sciences, and inertial fusion energy research. Shock-compression equation-of-state data and optical reflectivities of the fluid dense oxide, Gd3Ga5O12 (GGG), were measured at extremely high pressures up to 2.6 TPa (26 Mbar) generated by(More)
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