NDLI: Performance study of galactic cosmic ray shield materials

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Performance study of galactic cosmic ray shield materials

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wilson, John W. Nealy, John E. Kiefer, Richard L. Kim, Myung-Hee Y. Thibeault, Sheila A. Badavi, Francis F.
Copyright Year	1994
Description	The space program is faced with two difficult radiation protection issues for future long-term operations. First, retrofit of shield material or conservatism in shield design is prohibitively expensive and often impossible. Second, shielding from the cosmic heavy ions is faced with limited knowledge on the physical properties and biological responses of these radiations. The current status of space shielding technology and its impact on radiation health is discussed herein in terms of conventional protection practice and a test biological response model. The impact of biological response on the selection of optimum materials for cosmic ray shielding is presented in terms of the transmission characteristics of the shield material. Although the systematics of nuclear cross sections are able to demonstrate the relation of exposure risk to shield-material composition, the current uncertainty in-nuclear cross sections will not allow an accurate evaluation of risk reduction. This paper presents a theoretical study of risk-related factors and a pilot experiment to study the effectiveness of choice of shield materials to reduce the risk in space operations.
File Size	2060944
Page Count	42
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950010497
Archival Resource Key	ark:/13960/t18m27h23
Language	English
Publisher Date	1994-11-01
Access Restriction	Open
Subject Keyword	Space Radiation Heavy Ions Health Aerospace Medicine Galactic Cosmic Rays Risk Exposure Shielding Physiological Responses Thermal Stability Spacecrews Ionizing Radiation Biological Effects Radiation Protection 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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