载人航天器舱内辐射环境及剂量分析

Analysis of radiation environment and its dose within sealed cabin of manned spacecraft

摘要: 构建载人航天器模型,利用Geant4软件计算了银河宇宙射线中的质子穿过载人航天器后在水模体中的总吸收剂量以及次级粒子吸收剂量,并且统计了不同种类的次级粒子在水模体中的总数量分布。计算结果表明,次级粒子引起的辐射剂量所占比例为50%,且二次电子总数量达到了10⁷量级。

Abstract: By using the Geant4 toolkit, we have modeled the interaction process of the most abundant galactic cosmic ray particle fluxes (protons) injected into the water phantom in a manned spacecraft model. The total absorbed dose due to the protons and the absorbed dose due to the secondary particles generated by the radiation are estimated, as well as the total number of different kinds of secondary particles. Final results indicate that the proportion of the absorbed dose due to the secondary particles generated accounts for 50% of the total dose, and the total amount of the secondary electrons reaches the order of 107.