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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。
With the development of inertial confinement fusion, the quantitative analysis of fusion products, especially neutron detection becomes very important. The Monte Carlo N-particle MCNP (Monte Carlo N-particle) program was used to study the relative sensitivity of DT neutron detectors and the numerical simulation of neutron penumbra imaging with different Pb shielding thickness. The results show that the relative sensitivity of the simulation and experimental results in good agreement, and neutron imaging simulation for inertial confinement fusion physics experiments to provide guidance.