527 nm激光辐照盘靶受激布里渊散射光角分布
Angular distribution of stimulated Brillouin scattering from interaction of 527 nm laser with Au and Al disk targets
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摘要: 在“星光Ⅱ”激光装置上，开展了527 nm激光与金盘靶和铝盘靶相互作用实验，研究了激光辐照盘靶的受激布里渊散射光散射机制，获得了散射光能量角分布。实验结果表明：激光辐照金盘靶时，在入射激光能量大致相同的情况下，受激布里渊散射光能量在匀滑的条件下比没有匀滑时低一个数量级以上（背反能量除外），束匀滑对散射光的抑制作用十分明显。在匀滑条件下，越靠近背反方向，散射光能量越大。散射光能量分布沿方位角的变化不大。激光辐照铝盘靶时，散射光能量分布的离散性较大。Abstract: Experiments about interaction of 527 nm laser with disk targets were conducted on “Xingguang-Ⅱ” facility. The scattering mechanism of stimulated Brillouin scattering (SBS) were studied. The energy angular distribution of scattered lights was obtained. When the laser was smoothed, the experimental results showed that the scattered light was about one order weaker than that when the laser was not smoothed (except for back scattering). The restrain effect of beam-smoothing on scattered lights was very evident. Given the laser being smoothed, the SBS energy to the back-scattering direction became bigger. The angular distribution of scattered lights almost kept the same in all azimuth direction. When 527 nm laser interacted with Al targets, the dispersion of angular distribution of scattered
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Key words:
- laser-produced plasma /
- scattered light /
- disk target /
- stimulated brillouin scattering
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