全息术诊断激光产生蒸汽羽等离子体
HOLOGRAPHY OF LASER INDUCED PLASMA PLUME
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摘要: 介绍了用脉冲激光全息二次曝光法诊断Q开关钕玻璃激光脉冲与LY12铝靶(φ50×3)耦合产生蒸汽羽等离子体的原理和实验。在打靶激光脉宽约50ns,功率密度约5GW/cm2条件下,拍摄了激光产生蒸汽羽等离子体的全息干涉图。运用Abel变换和Saha方程,对全息干涉图进行数据处理,得到对激光与物质相互作用机理研究的有用参数。Abstract: The principle and experiments of double exposure holographic interferometry for measuring plasma plume from an LY12 aluminum target (φ50 ×3mm) irradiated by a Q -Switched Nd: glass Laser beam (50ns , 5 ×109W/cm2) are described. The holographic interference photo was taken by double exposure holography for t = 70.4ns. Using the Abel inversion and Saha equation the holographic interferogram are treated to yield parameters for Laser interactions with materials.
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Key words:
- holography /
- laser interactions with materials /
- plasma diagnosis
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