利用超高能中子诊断惯性约束聚变的燃烧

Using Super-high Energy Neutrons to Detect Inertial Confinement Fusion

惯性约束聚变靶丸中,高能中子相互之间发生碰撞将导致超高能中子的产生.本文讨论超高能中子产生与聚变燃烧速率的关系.数值模拟理想模型,分析超高能中子产生量与平均烧氚体积的关系,讨论利用出壳超高能中子流与烧氚量诊断二维效应和混合效应.进一步分析出壳超高能中子流与平均烧氚率的关系,探讨利用超高能中子诊断平均烧氚温度并判断是否发生非平衡效应问题.

In inertial confinement fusion（ICF） target, collision between fusion neutrons may produce super-high energy neutrons. A relationship between velocity of fusion and ratio of generated super-high energy neutron is derived. An ideal fusion model is simulated by numerical method. It indicates that the ratio of generated super-high energy neutron is increased sharply as burning volume of DT is decreased. With this information, 2D-effect and mixing-effect during compression of target are deduced with escaped super-high energy neutrons. Furthermore, a relationship between velocity of burning T and ratio of generated super-high energy neutron is concluded. It shows that using super-high energy neutron to detect ICF is effective.