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Analytical-HZETRN Model for Rapid Assessment of Active Magnetic Radiation ShieldingThe use of active radiation shielding designs has the potential to reduce the radiation exposure received by astronauts on deep-space missions at a significantly lower mass penalty than designs utilizing only passive shielding. Unfortunately, the determination of the radiation exposure inside these shielded environments often involves lengthy and computationally intensive Monte Carlo analysis. In order to evaluate the large trade space of design parameters associated with a magnetic radiation shield design, an analytical model was developed for the determination of flux inside a solenoid magnetic field due to the Galactic Cosmic Radiation (GCR) radiation environment. This analytical model was then coupled with NASA's radiation transport code, HZETRN, to account for the effects of passive/structural shielding mass. The resulting model can rapidly obtain results for a given configuration and can therefore be used to analyze an entire trade space of potential variables in less time than is required for even a single Monte Carlo run. Analyzing this trade space for a solenoid magnetic shield design indicates that active shield bending powers greater than 15 Tm and passive/structural shielding thicknesses greater than 40 g/cm2 have a limited impact on reducing dose equivalent values. Also, it is shown that higher magnetic field strengths are more effective than thicker magnetic fields at reducing dose equivalent.
Document ID
20140006033
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Washburn, S. A.
(Colorado Univ. Boulder, CO, United States)
Blattnig, S. R.
(NASA Langley Research Center Hampton, VA, United States)
Singleterry, R. C.
(NASA Langley Research Center Hampton, VA, United States)
Westover, S. C.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
May 22, 2014
Publication Date
January 1, 2014
Publication Information
Publication: Advances in Space Research
Volume: 53
Issue: 1
Subject Category
Space Radiation
Report/Patent Number
NF1676L-16781
Funding Number(s)
WBS: WBS 651549.02.07.07
Distribution Limits
Public
Copyright
Other

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