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Record 1 of 69654
Analytical-HZETRN Model for Rapid Assessment of Active Magnetic Radiation Shielding
External Online Source: doi:10.1016/j.asr.2013.09.038
Author and Affiliation:
Washburn, S. A.(Colorado Univ., Aerospace Engineering Sciences Dept., 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)
Abstract: The 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.
Publication Date: Jan 01, 2014
Document ID:
20140006033
(Acquired May 29, 2014)
Subject Category: SPACE RADIATION
Report/Patent Number: NF1676L-16781
Document Type: Reprint
Publication Information: Advances in Space Research ; Volume 53; No. 1 ; 8-17
Contract/Grant/Task Num: WBS 651549.02.07.07
Financial Sponsor: NASA Langley Research Center; Hampton, VA, United States
Description: 10p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: RADIATION SHIELDING; RADIATION DOSAGE; MAGNETIC SHIELDING; RADIATION TRANSPORT; GALACTIC RADIATION; MAGNETIC FLUX; MAGNETIC FIELDS; COSMIC RAYS; DEEP SPACE; ASTRONAUTS
Availability Source: Other Sources
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