Equation of state of diamond under shock compression up to 2 TPa

ORAL

Abstract

The equation of state of diamond was studied using laser-driven shock waves in the terapascal region between 0.5 and 2 TPa. Strong single shock waves were generated by direct-irradiation of laser beams from the GEKKO/HIPER glass laser system of the ILE. The shocked targets consisted of a 20 um-thick single crystalline diamond and a 20 um-thick aluminum foil, both of which were on a 50 um-thick aluminum base plate. The shock wave velocity was measured directly by observation of the self-emission or change of reflectivity. Using the impedance-matching method, the pressures and particle velocities of diamond were obtained.

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Authors

  • Takatoshi Ono

  • Hirofumi Nagao

  • Ken-ichi Kondo

    • Materials and Structures Laboratory, Tokyo Institute of Technology

  • Norimasa Ozaki

    • Laboratorie pour l'Utilisation des Lasers Intenses, Ecole Polytechnique

  • Kikuo Takamatsu

  • Keiji Nagai

  • Mitsuo Nakai

  • Kazuo A. Tanaka

    • Faculty of Engineering and Institute of Laser Engineering, Osaka University

  • Kunihiko Wakabayashi

  • Ken Okada

  • Masatake Yoshida

    • Research Center for Explosion Safety, National Institute of Advanced Industrial Science and Technology (AIST)