辐射烧蚀铝箔数值模拟研究  

Numerical simulation of radiation ablating aluminum foils

作　　者：许琰[1] 赖东显[1] 冯庭桂[1] 蓝可[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2001年第3期329-332,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题!(19735 0 0 2 )

摘　　要：利用一维多群辐射输运程序 RDMG数值模拟神光 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 条件下辐射烧蚀铝箔的厚度范围进行初步的探讨。We simulated radiation ablating Aluminum foil by using 1D muti group code(RDMG). With intense laser beams heating a gold hohlraum, the X ray with intensity of 0.71×10 14 W·cm -2 and pulse width 1.0ns emits from the hohlraum ablating 1.5μm and 3μm thick aluminum foil. The simulation investigates the radiation energy transport in hot dense medium 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.

关 键 词：辐射烧蚀 辐射热波 铝箔 铝等离子体 黑腔 

分 类 号：TL632.11[核科学技术—核技术及应用]