衝撃圧縮されたポリスチレンの温度・圧力・衝撃波速度の同時計測

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  • Simultaneous Measurement of Temperature, Pressure and Shock-Wave Velocity of Compressed Polystyrene
  • ショウゲキ アッシュク サレタ ポリスチレン ノ オンド アツリョク ショウゲキハ ソクド ノ ドウジ ケイソク

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Experiments, to measure temperature, pressure and shock wave velocity of compressed polystyrene (PS) simultaneously, are first carried out using the GEKKO XII⁄ HIPER laser system of the Institute of Laser Engineering, Osaka University. An optical system is made of Schwarzschild microscope and a biprism, which allowed the image of rear surfaces of a double-step target to be split into two and focused onto a slit of a visible streak-camera. Each image through two different band-pass filters is then recorded by using the streak-camera for spatially and temporally resolved measurement. First, pressure and shock wave velocity are calculated by observing the emissions from shock break out at the each step. Secondly, we measure the emissivities of the ultra-violet (UV) and blue range of spectrum from the shock wave-front passing in PS and decide color temperature from the ratio.

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