月球表面次级中子辐射环境仿真研究  

Simulation of induced neutron radiation environment on lunar surface

作　　者：蔡明辉 杨涛 韩瑞龙 许亮亮 夏清 韩建伟 李兴冀[3] CAI Minghui;YANG Tao;HAN Ruilong;XU Liangliang;XIA Qing;HAN Jianwei;LI Xingji(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学天文与空间科学学院,北京100049 [3]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《航天器环境工程》2021年第3期328-332,共5页Spacecraft Environment Engineering

基　　金：国家国防科技工业局某仿真分析软件专项课题(编号:E01Z360101)。

摘　　要：由于缺少磁场和大气,宇宙线高能粒子轰击月壤可以形成月球特有的强中子辐射环境,并对航天员和电子设备造成潜在威胁。文章采用蒙特卡罗方法仿真研究宇宙线高能粒子辐射与月壤成分核反应产生的次级中子能谱特征,给出不同太阳活动、不同月壤深度下月球中子能谱特征和空间分布特征。仿真结果表明,宇宙线高能粒子导致的次级中子随着月壤深度的增加先增大后减小,大约在1 m深度达到最大值,深度越深银河宇宙线诱发的中子贡献越大。相关结果可为我国后续载人月球探测任务的辐射防护设计提供参考。Due to the lack of the magnetic field and the atmosphere,the high energy cosmic ray particles bombarding the lunar soil can induce a unique strong neutron radiation,which poses a potential threat to the astronauts and the electronic equipment.In this paper,the Monte Carlo method is used to simulate the spectrum characteristics of the secondary neutrons produced by the reactions between the cosmic ray particles and the lunar regolith components.It is shown that the flux of the secondary neutrons induced by the energetic cosmic ray particles first increases and then decreases with the increase of the depth of the lunar soil,and reaches the maximum at a depth of about 1 m.The deeper the lunar regolith is,the greater the contribution of the neutrons induced by the galactic cosmic rays will be.The relevant results can provide a reference for the radiation protection design of China’s subsequent manned lunar exploration missions.

关 键 词：月球 宇宙线 次级中子 辐射剂量 仿真研究 

分 类 号：V4471[航空宇航科学与技术—飞行器设计]