强激光驱动高压冲击波特性研究

Study of the Properties of the Shock Wave Induced by High-power Laser

利用响应快、测压范围宽的新型绝缘膜组合式高聚物压电传感器 (PVDF压电传感器 )以及PIN硅光二极管和 PHIL IPS PM 332 0 A型示波器 ,实现了对激光引发的冲击波压力的实时测量。得到了激光冲击波在铝靶中的平均传播速度为 6 .38× 10 3 m/ s,与通常的声波纵波在铝中的传播速度 (6 4 0 0 m / s)很相近。激光引发的冲击波峰值压力在铝中的衰减规律是指数型的。

Using a new piezoelectricity gauge of insulation film and combined-high-polymer of a short rise time and wide linear response range, together with a PIN optoelectric tube and PHILIPS PM 3320A oscilloscope, the real-time measurement of pressure of the laser-induced shock wave is realized. Based on this technology, the propagation velocity and attenuation coefficient of the laser-induced shock wave in aluminum are obtained. The average propagation velocity of the laser-induced shock wave in aluminum is 6.38×103 m/s. The attenuation of peak pressure of the laser-induced shock wave in Al is an exponential function: P(x)=0.48exp(-0.14x).