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Interplanetary Radiation and Internal Charging Environment Models for Solar SailsA Solar Sail Radiation Environment (SSRE) model has been developed for characterizing the radiation dose and internal charging environments in the solar wind. The SSRE model defines the 0.01 keV to 1 MeV charged particle environment for use in testing the radiation dose vulnerability of candidate solar sail materials and for use in evaluating the internal charging effects in the interplanetary environment. Solar wind and energetic particle instruments aboard the Ulysses spacecraft provide the particle data used to derive the environments for the high inclination 0.5 AU Solar Polar Imager mission and the 1.0 AU L1 solar sail missions. Ulysses is the only spacecraft to sample high latitude solar wind environments far from the ecliptic plane and is therefore uniquely capable of providing the information necessary for defining radiation environments for the Solar Polar Imager spacecraft. Cold plasma moments are used to derive differential flux spectra based on Kappa distribution functions. Energetic particle flux measurements are used to constrain the high energy, non-thermal tails of the distribution functions providing a comprehensive electron, proton, and helium spectra from less than 0.01 keV to a few MeV.
Document ID
20040161466
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Minow, Joseph I.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Altstatt, Richard L.
(Jacobs Sverdrup Technology, Inc. Huntsville, AL, United States)
Neergaard, Linda F.
(Jacobs Sverdrup Technology, Inc. Huntsville, AL, United States)
Date Acquired
August 22, 2013
Publication Date
August 25, 2004
Subject Category
Space Radiation
Meeting Information
Meeting: Solar Sail Technology and Applications Conference
Location: Greenbelt, MD
Country: United States
Start Date: September 28, 2004
End Date: September 29, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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