An investigation of the consistency of the ionospheric measurements of the photoelectron flux and solar EUV flux

Details An investigation of the consistency of the ionospheric measurements of the photoelectron flux and solar EUV flux An investigation of the consistency of the ionospheric measurements of the photoelectron flux and solar EUV flux

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.5625r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, July 1, 1984, p. 5625-5635.

Computer Science

Sound

76

Extreme Ultraviolet Radiation, Ionospheric Sounding, Photoelectron Spectroscopy, Solar Flux, Energy Spectra, Ionization Cross Sections, Particle Production

Scientific paper

This paper demonstrates that there is an inconsistency between ionospheric measurements of the photoelectron flux and the solar EUV flux. The problem which occurs for EUV wavelengths near 250 A or photoelectron energies near 35 eV has serious implications for theoretical photoelectron flux calculations and could help to explain up to 40 percent of the difference between calculated and measured photoelectron fluxes for electron energies below 35 eV. It is also shown that: (1) only photons with wavelengths shorter than 310 A are of importance in producing photoelectrons; (2) above 20 eV, the photoelectron flux is controlled by the production of primary photoelectrons, while below 20 eV the flux is controlled by degraded photoelectrons; (3) the calculated cascading production rate is insensitive to the cross sections used for the calculation; and (4) the photoelectron flux is inversely proportional to the total inelastic cross sections.

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