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- WILSON JOHN W.
- NASA Langley Research Center
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- TRIPATHI RAM K.
- NASA Langley Research Center
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- QUALLS GARRY D.
- NASA Langley Research Center
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- CUCINOTTA FRANCIS A.
- NASA Johnson Space Center
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- PRAEL RICHARD E.
- Los Alamos National Laboratory
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- NORBURY JOHN W.
- University of Wisconsin-Milwaukee
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- HEINBOCKEL JOHN H.
- Old Dominion University
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- TWEED JOHN
- Old Dominion University
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- ANGELIS GIOVANNI DE
- Old Dominion University
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- Wilson J W
- NASA LaRC
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- Cucinotta F A
- NASA JSC
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抄録
Early space radiation shield code development relied on Monte Carlo methods and made important contributions to the space program. Monte Carlo methods have resorted to restricted one-dimensional problems leading to imperfect representation of appropriate boundary conditions. Even so, intensive computational requirements resulted and shield evaluation was made near the end of the design process. Resolving shielding issues usually had a negative impact on the design. Improved spacecraft shield design requires early entry of radiation constraints into the design process to maximize performance and minimize costs. As a result, we have been investigating high-speed computational procedures to allow shield analysis from the preliminary concept to the final design. For the last few decades, we have pursued deterministic solutions of the Boltzmann equation allowing field mapping within the International Space Station (ISS) in tens of minutes using standard Finite Element Method (FEM) geometry common to engineering design methods. A single ray trace in such geometry requires 14 milliseconds and limits application of Monte Carlo methods to such engineering models. A potential means of improving the Monte Carlo efficiency in coupling to spacecraft geometry is given.<br>
収録刊行物
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- Journal of Radiation Research
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Journal of Radiation Research 43 (S), S87-S91, 2002
Journal of Radiation Research 編集委員会
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詳細情報 詳細情報について
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- CRID
- 1390001205217730176
-
- NII論文ID
- 110002328960
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- NII書誌ID
- AA00705792
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- ISSN
- 13499157
- 04493060
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- NDL書誌ID
- 6523562
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- PubMed
- 12793737
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- NDL-Digital
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