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Chemistry, materials, & energy publications March 1, 2014

Heater-Induced Ionization Inferred from Spectrometric Airglow Measurements

Citation

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Hysell, D. L., Miceli, R. J., Kendall, E. A., Schlatter, N. M., Varney, R. H., Watkins, B. J., . . . Huba, J. D. (2014). Heater-induced ionization inferred from spectrometric airglow measurements. Journal of Geophysical Research-Space Physics, 119(3), 2038-2045.

Abstract

Spectrographic airglow measurements were made during an ionospheric modification experiment at High Frequency Active Auroral Research Program on 12 March 2013. Artificial airglow enhancements at 427.8, 557.7, 630.0, 777.4, and 844.6 nm were observed. On the basis of these emissions and using a methodology based on the method of Backus and Gilbert (1968, 1970), we estimate the suprathermal electron population and the subsequent equilibrium electron density profile, including contributions from electron impact ionization. We find that the airglow is consistent with heater-induced ionization in view of the spatial intermittency of the airglow.

Key points:

  • Energetic electron distribution during heating experiment deduced from airglow
  • Inferred electron energy spectrum sufficient to induce ionization
  • Results depend on inhomogeneity of airglow, which is filamentary

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