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Equation-of-state measurements of polyimide at pressures up to 5.8 TPa using low-density foam with laser-driven shock
K Takamatsu1, N Ozaki, K A Tanaka
1Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan.
Abstract:
The laser-driven equation-of-state (EOS) experiments for polyimide are presented. The experiments were performed with emission measurements from the rear sides of shocked targets at up to a laser intensity of 10(14) W/cm(2) or higher with 351 nm wavelength and 2.5 ns duration. Polyimide Hugoniot data were obtained up to 0.6 TPa with good accuracy. Applying low-density foam ablator to the EOS unknown material, we also obtained the data at a highest pressure of 5.8 TPa in the nonmetal materials. Those data were in agreement with the theoretical curves.