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Solar Proton Transport Within an ICRU Sphere Surrounded by a Complex Shield: Ray-trace GeometryA computationally efficient 3DHZETRN code with enhanced neutron and light ion (Z is less than or equal to 2) propagation was recently developed for complex, inhomogeneous shield geometry described by combinatorial objects. Comparisons were made between 3DHZETRN results and Monte Carlo (MC) simulations at locations within the combinatorial geometry, and it was shown that 3DHZETRN agrees with the MC codes to the extent they agree with each other. In the present report, the 3DHZETRN code is extended to enable analysis in ray-trace geometry. This latest extension enables the code to be used within current engineering design practices utilizing fully detailed vehicle and habitat geometries. Through convergence testing, it is shown that fidelity in an actual shield geometry can be maintained in the discrete ray-trace description by systematically increasing the number of discrete rays used. It is also shown that this fidelity is carried into transport procedures and resulting exposure quantities without sacrificing computational efficiency.
Document ID
20160002213
Acquisition Source
Langley Research Center
Document Type
Technical Publication (TP)
Authors
Slaba, Tony C. (NASA Langley Research Center Hampton, VA, United States)
Wilson, John W. (Old Dominion Univ. Norfolk, VA, United States)
Badavi, Francis F. (Old Dominion Univ. Norfolk, VA, United States)
Reddell, Brandon D. (NASA Johnson Space Center Houston, TX, United States)
Bahadori, Amir A. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
February 23, 2016
Publication Date
December 1, 2015
Subject Category
Space Radiation
Space Transportation And Safety
Report/Patent Number
L-20652
NASA/TP-2015-218994
NF1676L-23300
Report Number: L-20652
Report Number: NASA/TP-2015-218994
Report Number: NF1676L-23300
Funding Number(s)
WBS: WBS 651549.02.07.10
Distribution Limits
Public
Copyright
Public Use Permitted.

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