约束靶面黑漆涂层对激光冲击波的影响
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摘要: 介绍了约束靶表面的黑漆涂层对激光冲击波的影响。激光功率密度 109W/cm2量级，脉宽33ns，波长1.06μm。靶材选用两种不同厚度的铜和铝，靶表面用有机玻璃约束。通过对冲击波压力的直接测量发现，涂层不仅可以增加激光冲击波压力，而且还影响冲击波的演化过程。比较有无涂层的靶面SEM照片发现，黑漆涂层能有效地保护激光辐照表面，使之不受激光烧蚀。Abstract: The effects of black paint on laser induced shock waves in the aluminum and copper targets are introduced when the targets are irradiated by laser pulses of 33ns duration, at laser power density around 10E９W/cm(cm， and wavelength 1.06μｍ. The direct shock pssure measurements show that the black paint can increase the shock pssure amplitude and affect the shock evolution characteristics as well. The black paint can also protect target surfaces from laser ablation by comparing the SEM photographs of the target surfaces with that without black paint．
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Key words:
- laser shock waves /
- black paint /
- pssure measurement /
- laser ablation
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