Statistics – Computation
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stin...0241463n&link_type=abstract
Technical Report, NASA/TP-2002-211448; L-18155; NAS 1.60:211448
Statistics
Computation
Aerospace Environments, Electron Transfer, Planetary Magnetic Fields, Parameterization, Extraterrestrial Radiation, Bremsstrahlung, Electron Beams, Low Molecular Weights, Large Space Structures, Radiation Dosage
Scientific paper
A computational procedure for describing transport of electrons in condensed media has been formulated for application to effects and exposures from spectral distributions typical of electrons trapped in planetary magnetic fields. The procedure is based on earlier parameterizations established from numerous electron beam experiments. New parameterizations have been derived that logically extend the domain of application to low molecular weight (high hydrogen content) materials and higher energies (approximately 50 MeV). The production and transport of high energy photons (bremsstrahlung) generated in the electron transport processes have also been modeled using tabulated values of photon production cross sections. A primary purpose for developing the procedure has been to provide a means for rapidly performing numerous repetitive calculations essential for electron radiation exposure assessments for complex space structures. Several favorable comparisons have been made with previous calculations for typical space environment spectra, which have indicated that accuracy has not been substantially compromised at the expense of computational speed.
Anderson Brooke M.
Chang Chan-Kao
Cucinotta Francis A.
Katz Robert
Nealy John E.
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