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Shielding from Solar Particle Event Exposures in Deep SpaceThe physical composition and intensities of solar particle event exposures or sensitive astronaut tissues are examined under conditions approximating an astronaut in deep space. Response functions for conversion of particle fluence into dose and dose equivalent averaged over organ tissue, are used to establish significant fluence levels and the expected dose and dose rates of the most important events from past observations. The BRYNTRN transport code is used to evaluate the local environment experienced by sensitive tissues and used to evaluate bioresponse models developed for use in tactical nuclear warfare. The present results will help to the biophysical aspects of such exposure in the assessment of RBE and dose rate effects and their impact on design of protection systems for the astronauts. The use of polymers as shielding material in place of an equal mass of aluminum would prowide a large safety factor without increasing the vehicle mass. This safety factor is sufficient to provide adequate protection if a factor of two larger event than has ever been observed in fact occurs during the mission.
Document ID
20000036567
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Wilson, John W.
(NASA Langley Research Center Hampton, VA United States)
Cucinotta, F. A.
(NASA Langley Research Center Hampton, VA United States)
Shinn, J. L.
(NASA Langley Research Center Hampton, VA United States)
Simonsen, L. C.
(NASA Langley Research Center Hampton, VA United States)
Dubey, R. R.
(Old Dominion Univ. Norfolk, VA United States)
Jordan, W. R.
(Old Dominion Univ. Norfolk, VA United States)
Jones, T. D.
(Oak Ridge National Lab. TN, United States)
Chang, C. K.
(Christopher Newport Univ. Newport News, VA, United States)
Kim, M. Y.
(National Academy of Sciences - National Research Council Washington, DC United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Radiation Measurements
Publisher: Elsevier Science Ltd.
Volume: 30
ISSN: 1350-4487
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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