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A Simple Engineering Analysis of Solar Particle Event High Energy Tails and Their Impact on Vehicle DesignThe mathematical models for Solar Particle Event (SPE) high energy tails are constructed with several di erent algorithms. Since limited measured data exist above energies around 400 MeV, this paper arbitrarily de nes the high energy tail as any proton with an energy above 400 MeV. In order to better understand the importance of accurately modeling the high energy tail for SPE spectra, the contribution to astronaut whole body e ective dose equivalent of the high energy portions of three di erent SPE models has been evaluated. To ensure completeness of this analysis, simple and complex geometries were used. This analysis showed that the high energy tail of certain SPEs can be relevant to astronaut exposure and hence safety. Therefore, models of high energy tails for SPEs should be well analyzed and based on data if possible.
Document ID
20160006409
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Singleterry, Robert C., Jr. (NASA Langley Research Center Hampton, VA, United States)
Walker, Steven A. (Old Dominion Univ. Norfolk, VA, United States)
Clowdsley, Martha S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
May 19, 2016
Publication Date
April 1, 2016
Subject Category
Space Radiation
Spacecraft Design, Testing And Performance
Report/Patent Number
NF1676L-23809
L-20679
NASA/TM-2016-219183
Report Number: NF1676L-23809
Report Number: L-20679
Report Number: NASA/TM-2016-219183
Funding Number(s)
WBS: WBS 651549.02.07.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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