主脉冲参数和入射条件变化对等离子体状态的影响
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摘要: 用一维非平衡辐射流体力学程序,计算和分析了主脉冲激光斜入射与预脉冲垂直入射耦合作用锗靶介质的等离子体状态和激光增益区。研究表明,主脉冲以40°斜入射与其垂直入射相比,在相同靶面功率密度下,电子、离子温度、等离子体烧蚀深度下降约10%。在相同的靶面总能量下,40°斜入射电子温度下降约15%~20%。采用主激光斜入射时间延迟技术,这种下降差别还会更小,能量吸收效率会更高,激光增益区更大。Abstract: The plasma state and the gain regionproduced by a obliqueincidence laser at θ=40° coupled with a verticalincidence laser on Getarget are studied and compared with that produced by a verticalincidence alone.The results show that the refractive effect of compledincidence is smaller in comparison with obliqueincidence alone. If the laser power of verticalincidence is the same as coupledincidence
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Key words:
- couple pumping /
- oblique-incidence pumping /
- prepulse technique
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