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为了研究分析月球环境下γ光子高度计源辐射角度对其性能的影响,文章建立了月球着陆器简化模型,利用基于蒙特卡罗方法的粒子输运程序(MCNP)软件仿真计算了接收处理器捕获的光子计数随γ源辐射角度的变化规律。仿真结果表明:辐射角度小于一定值时,光子计数随着辐射角度的增大近似呈线性增长;当γ源辐射角度增大到一定值时,光子计数基本不再有变化。文章的分析方法和结果可以为合理确定γ光子高度计源辐射角度提供设计参考。
In order to study and analyze the influence of γ-ray altimeter source radiation on its performance under the lunar environment, a lunar lander simplified model was established. The Monte Carlo method based Particle Transport Program (MCNP) Variation of Photon Count with γ Radiation Angle. The simulation results show that when the radiation angle is less than a certain value, the photon counting increases linearly with the increase of radiation angle. When the radiation angle of γ source increases to a certain value, the photon count basically does not change any more. The analysis methods and results of the article can provide design reference for the reasonable determination of the source radiation angle of γ-photon altimeter.