Laser transfer in plasma produced by CH foam
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摘要: 报道了神光Ⅱ装置上激光膜相互作用的实验，实验利用能量计和光电管测量激光与CH薄膜作用前后的能量和时间波形的变化。结果表明：激光对CH薄膜透过率由作用产生的激光等离子体电子密度决定；功率密度为1.01014 W/cm2的激光与CH薄膜作用下，入射激光能量脉冲前沿与薄膜作用产生激光等离子体；在200 ps时，激光等离子体电子密度稀疏到临界密度以下，激光开始透过等离子体；在700 ps后，等离子体密度远低于临界密度，激光完全透过激光等离子体。Abstract: This paper reports the laser transfer in plasma produced by CH on Shengguang Ⅱ. The laser transmission rate was decided by the plasma density. When the laser incidence was 0.5 m CH on Shengguang Ⅱ, the plasma density would be under critical value after 200 ps, the laser would pass the plasma. When the plasma density was 1% critical density after 700 ps, the laser could pass the plasma completely.
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Key words:
- laser plasma /
- critical density /
- transmission rate
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