利用“神光-Ⅱ”激光装置多路光束叠加直接驱动下的冲击波平面性及稳定性
Ｐlanarity and stability of shock driven directly by multi-beam laserfrom “Shenguang-II” laser facility
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摘要: 利用“神光-Ⅱ”的3路基频光输出及小透镜列阵束匀滑技术，通过优化设计和合理地选择光路组合，实现了多路叠加斜入射的驱动激光, 在靶材料中产生一个650~750μm范围内平面性良好的冲击波，有效地提高了“神光-Ⅱ”输出光束的利用率。同时，利用斜面靶进行的冲击稳定性实验表明，在靶面功率密度分别为3.26×1014及2.56×1014W/cm2时，冲击波至少在28.38~55.82和22.13~35.07μm的Al样品厚度内是稳定传播的。Abstract: On the basis of the three-beam output of basic frequency from “Shenguang-II” laser facility and beam smoothing technology of lens-array, the shock wave with a better planarity in ranged 650~750μm the target was created after optimum design and rational combination for laser beam. Then the efficiency of output beams from “ShenguangII” laser facility had been raised. And the shock stability experiment with the inclinedplane target indicated that the shock wave steadily propagated in the Al target of thickness of about 28.38~55.82μm and 22.13~35.07μm under the power density of 3.26×1014W/cm2 and 3.11×1014W/cm2 respectively.
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Key words:
- shock wave /
- flatness /
- stability /
- laser equation of state /
- lensarray /
- inclined-plane target
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