用1.05,0.53μm激光辐照Au盘靶的吸收规律与数值模拟

NUMERICAL SIMULATION AND SCALING LAW OF ABSORPTION OF GOLD DISK TARGETS IRRADIATED BY 1.05 AND 0.53μm LASER

离散等离子体卡计测量等离子体能量,研究～0.8ns,1.05,O.53μm激光辐照Au盘靶产生的Au等离子体对激光的吸收规律.报道了吸收与激光入射角度和功率密度关系的实验结果.根据分析实验结果提出了吸收的定标规律.实验结果与一维平面等离子体模型模拟结果相符.

Au disk targets were irradiated with -0.8 ns, 1.05 and 0.53 μm laser. The intensity and angular dependence of absorption were studied experimentally. The experimental results of absorption by laser-produced plasma are introduced in this paper. The measured absorption with plasma calorimeters accord with one-dimension planar simulation. The experiment and theory show that collision absorption is the main absorption mechanism. A scaling law of absorption has been suggested based on the careful analysis of the experimental results.