Simulation of radiation field inside interplanetary spacecraft.

A simulation of the radiation field inside a habitable module (a diameter of 6 m and length of 12 m) of a spacecraft generated by isotropic Galactic Cosmic Radiation (GCR) in deep interplanetary space is carried out for minimum and maximum solar activity using the FLUKA code. Protons, alpha-particles, deuterons, 3 He, and nuclei with Z > 2 are considered as primary GCR irradiating the spacecraft isotropically. The following particles are included in FLUKA radiation transport through the module shell ( 15 g/cm 2 of Al): protons, neutrons, γ -rays, electrons, π ± -mesons, μ ± -mesons d, t, and nuclei from He to Ni. The inner particle spectra are needed to assess the astronaut's radiation risk in a long-term interplanetary mission. [ABSTRACT FROM AUTHOR]