MCNP在惯性约束聚变核探测中的初步应用

Use of MCNP to simulate nuclear detection of inertial confinement fusion

随着惯性约束聚变的发展,对聚变产物特别是中子探测的定量分析变得非常重要。采用三维Monte Carlo输运程序MCNP(Monte Carlo N-particle),对不同铅屏蔽厚度下探测器的DT中子相对灵敏度,和中子半影成像的数值模拟进行了一定的研究。结果显示,相对灵敏度的模拟与实验结果符合得很好,而中子成像模拟能为惯性约束聚变物理实验的开展提供指导。

The use of quantum analysis in neutron detection is quite important in the development of inertial confinement fusion reactors.The three-dimensional Monte Carlo N-particle code(MCNP) was used to analyze the relative sensitivity of DT neutrons with various leadshielding thicknesses and to numerically simulate neutron penumbral imaging.The relative sensitivity results agree well with previous experimental results while the neutron imaging results can support the design of inertial confinement fusion experiments.