Record Details

Solar Proton Transport Within an ICRU Sphere Surrounded by a Complex Shield: Ray-trace Geometry
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Author and Affiliation:
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)
Abstract: A 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.
Publication Date: Dec 01, 2015
Document ID:
20160002213
(Acquired Feb 26, 2016)
Subject Category: SPACE RADIATION; SPACE TRANSPORTATION AND SAFETY
Report/Patent Number: NASA/TP-2015-218994, NF1676L-23300, L-20652
Document Type: Technical Report
Contract/Grant/Task Num: WBS 651549.02.07.10
Financial Sponsor: NASA Langley Research Center; Hampton, VA, United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 19p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: SOLAR PROTONS; RADIATION SHIELDING; RAY TRACING; COMPUTATIONAL GEOMETRY; COMBINATORIAL ANALYSIS; THREE DIMENSIONAL MODELS; EXTRATERRESTRIAL RADIATION; RADIATION DOSAGE; COMPUTER PROGRAMS; AEROSPACE ENVIRONMENTS
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