Radiation environment created with GCRs inside a spacecraft

Publication date: Available online 12 September 2019Source: Life Sciences in Space ResearchAuthor(s): M.I. Dobynde, Y.Y. ShpritsAbstractWe use the GEANT4 Monte-Carlo code to calculate radiation dose equivalent due to GCR during an out-of-magnetosphere space flight. We provide a detailed analysis of radiation dose composition, distinguishing between the contribution of primary GCR particles and different species of secondary particles. We show that for realistic spacecraft shielding, the radiation dose equivalent is mostly determined with GCR protons and alphas. The radiation dose is lower behind a shielding with a larger radius. We show that indirectly scattered secondary particles make a large contribution to the net radiation dose. Up to 90% of the secondary neutron dose equivalent is associated with indirectly scattered particles.
Source: Life Sciences in Space Research - Category: Biology Source Type: research