高温铝等离子体X光发射谱实验
Experimental research on X-ray spectrum emitted from hot laser-produced aluminium plasma
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摘要: 在神光-Ⅱ高功率激光装置上，以束匀滑的第九路钕玻璃二倍频激光均匀辐照薄层铝埋点靶，通过激光烧蚀作用产生较均匀的铝高温等离子体，用平面晶体谱仪在靶面前向和切向同时测量了X光发射谱信号，并将前向发射谱进行了定量化还原处理。利用辐射流体力学程序MULTI-1D首先对等离子体状态进行了模拟计算，然后采用基于碰撞辐射模型的光谱程序对该状态下的光谱开展了计算，并将实验测量光谱与理论计算光谱进行了比较和分析，符合得较好。Abstract: The hot uniform aluminium plasma was produced by irradiating thin aluminium dotted foil smoothly with the 9th 0.53 μm laser on Shenguang Ⅱ laser facility. The emitted spectrum was measured from the front and tangential direction of the target with two crystal spectrometers, and the quantitative spectrum from the front of the target was obtained. The state of laser-produced plasma was simulated with the radiation hydrodynamics code MULTI-1D, and the emitted spectrum was calculated with the spectrum code of Collision-Radiation model under the simulated plasma state. The experimental spectrum accords with the simulated one.
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