F121 臨界角近傍の屈折率変化によるパルス圧力波形の可視化

概要

論文の詳細を見る
Optical method has been proposed to visualize a high pressure pulse profile induced by ns duration pulse laser. Present method is based on the fact that reflectivity and critical angle of total internal reflection depends on the densities of water and glass material. Intensity of reflected light from the interface of prism and water can be interpreted as a pressure profile, as long as we know the dynamical and optical properties of water, glass at high pressure. High pressure pulse in water has been generated by focusing pulse laser beam onto the PMMA surface, which is intentionally roughened and aluminized. Typical pressure profiles showed the rapid decay in peak pressure with propagation, while the pulse duration increases from laser pulse duration of 4 ns to about 100 ns.
日本流体力学会の論文
2002-07-23