Physics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9117999s&link_type=abstract
Unknown
Physics
Galactic Cosmic Rays, Lunar Surface, Mars Surface, Nucleons, Radiation Protection, Radiation Shielding, Space Stations, Dosage, Manned Space Flight, Orbit Transfer Vehicles, Planetary Geology, Regolith, Solar Activity Effects, Space Exploration
Scientific paper
Radiation protection assessments are performed for advanced Lunar and Mars manned missions. The Langley cosmic ray transport code and the nucleon transport code are used to quantify the transport and attenuation of galactic cosmic rays and solar proton flares through various shielding media. Galactic cosmic radiation at solar maximum and minimum, as well as various flare scenarios are considered. Propagation data for water, aluminum, liquid hydrogen, lithium hydride, lead, and lunar and Martian regolith (soil) are included. Shield thickness and shield mass estimates required to maintain incurred doses below 30 day and annual limits (as set for Space Station Freedom and used as a guide for space exploration) are determined for simple geometry transfer vehicles. On the surface of Mars, dose estimates are presented for crews with their only protection being the carbon dioxide atmosphere and for crews protected by shielding provided by Martian regolith for a candidate habitat.
Nealy John E.
Simonsen Lisa C.
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