| 非平衡辐射烧蚀对内爆中子产额的影响 |
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| 引用本文： | 盛家田, 缪文勇, 李沄生, 等. 非平衡辐射烧蚀对内爆中子产额的影响[J]. 强激光与粒子束, 2005, 17(03). |
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| 作者姓名： | 盛家田 缪文勇 李沄生 高耀民 冯杰 陈家斌 李蒙 冯庭桂 张利发 曾先才 |
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| 作者单位： | 1.北京应用物理与计算数学研究所,北京1 00088;;;2.中国工程物理研究院 激光聚变研究中心,四川 绵阳 621 900 |
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| 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。
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| 关 键 词： | 平衡辐射源 辐射烧蚀 M能带 中子产额 |
Influence of non-LTE radiation ablation on imploding neutron yield |
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| sheng jia-tian, mou wen-yong, li yun-sheng, et al. Influence of non-LTE radiation ablation on imploding neutron yield[J]. High Power Laser and Particle Beams, 2005, 17. |
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| Authors: | sheng jia-tian mou wen-yong li yun-sheng gao yao-min feng jie chen jia-bin li meng feng ting-gui zhagn li-fa zeng xian-cai |
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| Affiliation: | 1. Beijing Institute of Applied Physics and Computational Mathematics,P.O.Box 8009,Beijing 100088,China;;;2. Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China |
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| Abstract: | 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 increasing of the CH-sell thickness is in agreement with the experime |
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| Keywords: | non-lte radiation source radiative ablation m energy band neutron yield |
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