NDLI: Comparison of martian meteorites and martian regolith as shield materials for galactic cosmic rays

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Comparison of martian meteorites and martian regolith as shield materials for galactic cosmic rays

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wilson, John W. Kim, Myung-Hee Y. Simonsen, Lisa C. Thibeault, Sheila A.
Copyright Year	1998
Description	Theoretical calculations of radiation attenuation due to energetic galactic cosmic rays behind Martian rock and Martian regolith material have been made to compare their utilization as shields for advanced manned missions to Mars because the detailed chemical signature of Mars is distinctly different from Earth. The modified radiation fields behind the Martian rocks and the soil model were generated by solving the Boltzmann equation using a HZETRN system with the 1977 Solar Minimum environmental model. For the comparison of the attenuation characteristics, dose and dose equivalent are calculated for the five different subgroups of Martian rocks and the Martian regolith. The results indicate that changes in composition of subgroups of Martian rocks have negligible effects on the overall shielding properties because of the similarity of their constituents. The differences for dose and dose equivalent of these materials relative to those of Martian regolith are within 0.5 and 1 percent, respectively. Therefore, the analysis of Martian habitat construction options using in situ materials according to the Martian regolith model composition is reasonably accurate. Adding an epoxy to Martian regolith, which changes the major constituents of the material, enhances shielding properties because of the added hydrogenous constituents.
File Size	635824
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980237030
Archival Resource Key	ark:/13960/t8dg1pf20
Language	English
Publisher Date	1998-10-01
Access Restriction	Open
Subject Keyword	Space Radiation Solar Activity Effects Galactic Cosmic Rays Mars Planet Shielding Regolith Radiation Distribution Epoxy Resins Environment Models Boltzmann Transport Equation Mars Surface Extraterrestrial Radiation Signatures Snc Meteorites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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