MC法构建空间舱内辐射环境  

Construction of the Radiation Environment in Spacecraftby MC Method

作　　者：吴正新[1] 孙慧斌[1] 王义元 刘国卿[1] 赵海歌[1] 徐世祥[1] 胡世鹏[1] 郝昕[1] 何承发[3] 呼延奇[4] WU Zheng-xin;SUN Hui-bin;WANG Yi-yuan;LIU Guo-qing;ZHAO Hai-ge;XU Shi-xiang;HU Shi-peng;HAO Xin;HE Cheng-fa;HU Yan-qi(College of Physics and Optoelectronic Engineering,Shenzheng University,Shenzheng,Guangdong 518060,China;Shanghai Institute of Aerospace System Engineering,Shanghai 201109,China;Xinjiang Technical Institute of Physics and Chemistry,Urumqi Xinjiang 830011,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]深圳大学物理与光电工程学院,广东深圳518060 [2]上海宇航系统工程研究所,上海201109 [3]中国科学院新疆理化技术研究所,新疆乌鲁木齐830011 [4]北京空间飞行器总体设计部,北京100094

出　　处：《核电子学与探测技术》2022年第4期717-722,共6页Nuclear Electronics & Detection Technology

基　　金：广东省重点领域研发计划(2020B0404020005);上海航天科技创新基金(SAST2021-023)资助。

摘　　要：高能质子是空间辐射环境的重要组成部分,其与航天器防护材料相互作用产生了复杂多样的次级粒子,严重威胁宇航员的生命安全。为此本文运用蒙特卡罗程序Geant4计算了银河宇宙质子穿过同等质量厚度的聚乙烯、水、碳钎维及铝四种材料的空间舱内次级粒子能谱分布,分析比较了空间舱内ICRU球5 cm深度处的当量剂量。计算结果表明:不同的屏蔽材料产生的次级粒子能谱差异较大;穿过聚乙烯时产生的次级中子通量以及ICRU球内5 cm深度处当量剂量最小;同等质量厚度下,聚乙烯比铝的屏蔽效果提高了至少10%。High-energy proton is an important part of space radiation environment,and its interaction with spacecraft protective materials produces complex and diverse secondary particles,which seriously threatens the life safety of astronauts.In this paper,the Monte Carlo program Geant4 is used to calculate the energy spectrum distribution of secondary particles in the space capsule of galactic cosmic protons passing through polyethylene,water,carbon brazing and aluminum with the same mass thickness,and the equivalent dose of ICRU ball at 5 cm depth in the space capsule is analyzed and compared.The calculation results show that the energy spectra of secondary particles are quite different.The secondary neutron flux generated when passing through polyethylene and the equivalent dose at 5 cm depth in ICRU sphere are the smallest;Under the same mass thickness,the shielding effect of polyethylene is improved by at least 10%compared with that of aluminum.

关 键 词：MC法 空间舱 次级能谱 当量剂量 屏蔽材料 

分 类 号：TL99[核科学技术—核技术及应用]