航天器内部由银河宇宙射线（GCRs）产生的辐射环境。

Radiation environment created with GCRs inside a spacecraft.

作者信息

Dobynde M I, Shprits Y Y

机构信息

Skolkovo Institute of Science and Technology, Moscow, Russian Federation.

GFZ German Research Centre for Geosciences, Helmholtz Centre Potsdam, Germany; Institute of Physics and Astronomy, University of Potsdam, Germany; Department of Earth Planetary and Space Sciences, University of California, Los Angeles, United States.

出版信息

Life Sci Space Res (Amst). 2020 Feb;24:116-121. doi: 10.1016/j.lssr.2019.09.001. Epub 2019 Sep 12.

DOI:10.1016/j.lssr.2019.09.001

PMID:31987475

Abstract

We use the GEANT4 Monte Carlo code to calculate the radiation dose equivalent due to Galactic Cosmic Rays (GCRs) during an out-of-magnetosphere space flight. We provide a detailed analysis of the radiation dose composition, distinguishing between the contribution of primary GCR particles and different species of secondary particles. We show that for realistic shielding thicknesses, the radiation dose equivalent is mostly due to GCR protons and alpha particles. The Blood-Forming Organs (BFO) dose equivalent is the same in the shielding spheres with the radius of 50 and 100 cm, although the dose composition differs. We show that indirectly scattered secondary particles make up to 60% to the net radiation dose. Up to 90% of the secondary neutron dose equivalent is associated with indirectly scattered particles.

摘要

我们使用GEANT4蒙特卡罗代码来计算磁层外太空飞行期间银河宇宙射线（GCR）产生的辐射剂量当量。我们对辐射剂量组成进行了详细分析，区分了初级GCR粒子和不同种类次级粒子的贡献。我们表明，对于实际的屏蔽厚度，辐射剂量当量主要来自GCR质子和α粒子。尽管剂量组成不同，但在半径为50厘米和100厘米的屏蔽球中，造血器官（BFO）的剂量当量是相同的。我们表明，间接散射的次级粒子占净辐射剂量的60%。高达90%的次级中子剂量当量与间接散射粒子有关。