辐射烧蚀铝箔数值模拟研究

利用一维多群辐射输运程序RDMG数值模拟神光II条件下辐射烧蚀铝箔的实验研究，详细描述了X光在铝箔中的辐射输运过程，清楚地显示了辐射热波在铝箔中的传播，给出铝等离子体温度密度的时空分布、铝箔背面出射的X光能谱及出射X光各能区能流随时间的变化，分析出射X光的能区对测量结果的影响，对神光II条件下辐射烧蚀铝箔的厚度范围进行初步的探讨。数值结果与实验结果相吻合。

Nuerical simulation of radiation ablating aluminum foils

We simulated radiation ablating Aluminum foil by using 1D muti-groups code(RDMG). With intense laser beams heating a gold hohlraum, the X-ray with intensity of 0.71 1014W× cm- 2 and pulse width 1.0ns emits from the hohlraum ablating 1.5m m and 3m m thick aluminum foil. The simulation investigates the radiation energy transport in hot dense mdium-Z matter (aluminum) and clearly shows the process of radiation heat wave passing through the aluminum foil. It has shown the sudden onset of X-ray flux from rear side of aluminum foil observed by experiments. The burn-through times predicted by the simulation fit well with the experimental results.