Mid-latitude E region - An examination of the existence of a corpuscular source

Details Mid-latitude E region - An examination of the existence of a corpuscular source Mid-latitude E region - An examination of the existence of a corpuscular source

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2795m&link_type=abstract

Journal of Geophysical Research, vol. 81, June 1, 1976, p. 2795-2804.

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Atmospheric Radiation, E Region, Ionizing Radiation, Magnetic Disturbances, Midlatitude Atmosphere, Plasma-Particle Interactions, Atmospheric Ionization, Electron Flux Density, High Energy Electrons, Ionospheric Disturbances, Night Sky, Photoelectrons, Rocket Flight

Scientific paper

We present new data from two rocket flights and examine the published evidence for the existence of a corpuscular source of ionization at E region heights. The rockets were launched from White Sands to provide measurements of energetic electrons and protons between 40 eV and 5.5 keV in the E region below 120 km. A daytime flight launched during a geomagnetically disturbed period provided measurements of a small flux of electrons which exhibits a strong altitude dependence below 500 eV but essentially none above that energy. The observed electron energy flux at 116 km is about 0.0018 erg per sq cm sec. We interpret these to be photoelectrons. During the nighttime flight we observed an energy flux which was less than 0.00001 erg per sq cm sec. The electron flux values contrast sharply with much higher values reported by some other investigators. The implications of and some possible reasons for the differences are discussed. Since we observe no significant fluxes of energetic particles in a geomagnetically disturbed ionosphere, even in the presence of fluctuating nighttime E region ionization, the presence of such fluctuations cannot be taken as evidence of precipitating particles.

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