非平衡辐射烧蚀对内爆中子产额的影响  

Influence of non-LTE radiation ablation on imploding neutron yield

作　　者：盛家田[1] 缪文勇[2] 李沄生[1] 高耀民[1] 冯杰[2] 陈家斌[2] 李蒙[1] 冯庭桂[1] 张利发[1] 曾先才[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2005年第3期386-390,共5页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：利用1维多群非平衡辐射输运RDMG程序,对不同能谱分布的辐射场驱动的靶丸的辐射烧蚀过程及中子产额进行了模拟计算,并与实验测量结果进行了初步比较。结果发现,辐射驱动源的能谱平衡性,特别是高能金M带成分对内爆靶丸产生预热效应,降低核燃料区压缩度,电子及离子温度,从而显著降低了中子产额。计算结果表明:中子产额随CH壳厚增加而下降,该变化规律与实验结果基本符合。The process of radiative ablation and neutron yields of DD-capsule with CH shell implosion driven by Plank spectrum and nonequilibrium spectrum radiation fields was numerically studied using 1-D RDMG code of multigroup-nonequilibrium radiation hydrodynamics. The simulation results were compared with the experimental results. The results of the simulation show that the nonequilibrium of energy spectrum distribution of the hohlraum radiation source, especially the M-band of it, will preheat DD in the capsule obviously, decrease the compressing ratio, electron and ion temperatures of DD gas, and therefore decrease the neutron yields markedly. The simulation results also show that the law of decreasing of neutron yields with the increase of the CH-sell thickness is in agreement with the experiment basically.

关 键 词：非平衡辐射源 辐射烧蚀 M能带 中子产额 

分 类 号：TN246[电子电信—物理电子学]