Physics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978georl...5..581l&link_type=abstract
Geophysical Research Letters, vol. 5, July 1978, p. 581-583.
Physics
Daytime, Electron Energy, Energy Spectra, Photoelectrons, Data Reduction, High Resolution, Line Spectra, Spectral Line Width
Scientific paper
A substantial improvement in energy resolution for photoelectron energy spectra in the 150-320 km altitude range is reported. The spectra were obtained with the AE-E satellite. The improvement is based on a data analysis technique which makes use of spectra obtained from the spinning spacecraft when the potential of the sensor varies slightly with respect to the ionospheric plasma as a consequence of the v x B induced voltage in the spacecraft body. The results permit determination of the line shape and area of the O and N2 304A solar radiation-produced photoelectron lines as a function of altitude. The photoelectron lines are found to be essentially unbroadened by coulomb scattering below 200 km, but substantial broadening occurs by 250 km. At 300 km, the characteristic line shape due to coulomb scattering with a degradation to low energy and a sharp high energy side can be observed readily.
Bostrom C. O.
Doering John P.
Lee Joon Sue
Potemra Thomas A.
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