Radiation Exposure For Human Mars Exploration

摘要: One major obstacle to human space exploration is the possible limitations imposed by adverse effects of long-term exposure environment. Even before flight began, potentially brief astronauts very intense random solar energetic particle events was great concern. A new challenge appears in deep-space from low-intensity heavy-ion flux galactic cosmic rays since missions are long duration, and accumulated exposures can be high. Because cancer induction rates increase behind low moderate thicknesses aluminum shielding, according available biological data on mammalian ray-like ions, shield requirements for a Mars mission may prohibitively expensive terms launch costs. Alternative materials vehicle construction under investigation provide lightweight habitat structures with enhanced shielding properties. In present paper, updated estimates astronaut presented properties alternative compared aluminum.