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High power laser interaction effects with metallic pressure vessel

机译：与金属压力容器的高功率激光相互作用效应

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The paper describes the theoretical and experimental investigation of high power Gas Dynamic Laser(GDL, λ ～ 10.6 μm) interaction studies with a pressurized hollow metal(MS) target. The design and development of such type of target which has been shown bursting as well as burning effect at the time of interaction have been carried out. It has been filled by gas mixture of H_2 and Air in the range of flammability limit. Various parameters like power density, target thickness, filling pressure, mixture ratio etc have been optimized. High mass flow GDL of power level about several K. W in unstable mode provides power density about 3.2 KW/Cm~2 by a beam delivery system at distance 25m. Since target material is thin and heat diffuses through it rapidly, by maintaining the required power density, rupturing is accomplished by heating an area of the pressure vessel to a temperature at which it will fail under the pressure load. Rupture initiates a propagating crack which spreads the damage over a large fraction of the pressure vessel. The gas mixture ignites due to its contact with atmosphere and explodes with a massive sound level of the order of 130dB. The sound level was measured by a Decibel meter. Temperature distribution along radial and depth have been studied theoretically. Surface temperature during interaction has been measured. Experimental data has been validated with theory. These study shows a very attractive demonstration showing potentiality of scientific applications of High Power CO_2 Laser.
机译：本文介绍了高功率气体动力激光（GDL，λ〜10.6μm）与加压空心金属（MS）靶相互作用的理论和实验研究。已经进行了这种类型的靶的设计和开发，该靶在相互作用时显示出破裂以及燃烧效果。在易燃极限范围内，已用H_2和空气的混合气体填充。优化了各种参数，例如功率密度，目标厚度，填充压力，混合比等。功率水平约为数K. W的高质量流量GDL在不稳定模式下通过距离25m处的光束传输系统提供约3.2 KW / Cm〜2的功率密度。由于目标材料很薄并且热量迅速扩散通过它，因此通过保持所需的功率密度，可以通过将压力容器的某个区域加热到在压力负载下会失效的温度来实现破裂。破裂会引起裂纹扩展，从而将损坏扩散到很大一部分压力容器中。气体混合物由于与大气接触而点燃，并以大约130dB的巨大声级爆炸。声级由分贝仪测量。从理论上研究了沿径向和深度的温度分布。已经测量了相互作用期间的表面温度。实验数据已得到理论验证。这些研究显示了一个非常有吸引力的演示，展示了高功率CO_2激光器的科学应用潜力。

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