Physics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.2155r&link_type=abstract
Journal of Geophysical Research, vol. 88, Mar. 1, 1983, p. 2155-2162.
Physics
24
Atmospheric Models, Energy Spectra, Ionospheric Electron Density, Photoelectrons, Electron Energy, Electron Impact, Flux (Rate), Parameterization, Photoelectron Spectroscopy
Scientific paper
A method for calculating the ionospheric photoelectron flux is developed which uses the concept of average electron energy loss to simplify the calculation of the degraded electron spectrum. This method requires only a knowledge of the total inelastic electron impact cross sections and can be used for the calculation of all secondary ion and excited state production rates. The simple calculation reduces the computing time by a factor of 10 and considerably reduces storage requirements. It is found that the ionospheric photoelectron flux in the local equilibrium region is directly proportional to the attenuated solar EUV flux, which is a function only of the total neutral column density, and is independent of the neutral density composition. Thus, it is shown that electron impact cross section can be chosen so that this method may also be used to parameterize the measured ionospheric photoelectron fluxes.
Richards Paul G.
Torr Douglas G.
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