15 MeV电子束驱动中子源靶站模拟分析

Analysis of Simulation for Neutron Target Driven by 15 MeV Electron Beam

摘要: 电子轰击金属靶产生的中子源，可用于核素反应截面测量实验。为利用7.5 kW、15 MeV电子加速器作为驱动加速器，产生适用于核数据测量实验的中子源，相应开展了该功率下的中子靶站设计。研究中，依据蒙特卡罗程序MCNPX模拟计算的中子源数据，分析优化靶站结构；计算得到靶体能量沉积，导入商用CFD软件CFX中作为热源，模拟分析靶体对流传热性质，优化冷却通道模型，安全实现中子靶站冷却。本研究模拟设计的靶站，能产生强度为10¹²s^-1量级的中子源。

Abstract: The photoneutron source driven by electron beam is fit for nuclear data measurement experiment. The neutron target, driven by a 15 MeV electron accelerator at power of 7.5 kW, was designed for the experiment. The MCNPX code was used to simulate the neutron source. With the simulation data, the target geometry and other parameters were optimized. And the CFX, a commercial CFD code, was used for the target cooling simulation to insure it working properly. A neutron source with an intensity of 10¹²s^-1 is available in this designed work.