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激光辐照铝靶汽化过程的高速纹影诊断技术 被引量:1

DIAGNOSTICS OF HIGH SPEED SCHLIEREN FOR VAPORIZATION OF ALUMINUM TARGETS IRRADIATED BY LASER BEAM
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摘要 应用高速纹影系统记录激光束辐照在Ly12铝靶时所产生的汽化羽扩张、空气爆炸波、熔融物质喷溅以及穿靶等现象.并由扫描摄影记录的轨迹图测出汽化羽的扩张速度为150~190m/s,空气冲击波速度为450~500m/s,靶表面高压蒸汽速度为5~7.8km/s。 In this paper the transient process during a normal pulsed Nd-glass laser beam irradiating Lyl2 aluminum targets 2mm think was observed by means of high speed schlieren framing technique. It is shown that the flow field configuration consists of expanding vapor plume, air blast wave , ejection of melted target substance and target ablation and penetration. Expanding velocity of the vapor plume of 150-190m/s, velocity of the air blast wave of 450-500m/s and velocity of the high pressure steam near the target surface of 5- 7.8km/s , are obtained, respectively, by scanning the photographs.
作者 韩立石
出处 《强激光与粒子束》 EI CAS CSCD 1989年第4期371-374,共4页 High Power Laser and Particle Beams
关键词 高速纹影系统 自由振荡 high speed schlieren system, free oscillating, Nd-glass laser, vapor plume.
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