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The dependence of F-region electron heating on HF radio pump power: Measurements at EISCAT Tromso
journal contribution
posted on 2012-10-24, 08:55 authored by A. Senior, M. T. Rietveld, T. K. Yeoman, M. J. Kosch[1] Measurements of ionospheric electron temperature enhanced by the action of a powerful high-frequency radio wave on the F-region at the EISCAT facility near Tromsø, Norway are analyzed to obtain the electron heat source due to the radio wave as a function of transmitter power. The absorption of the wave in the D-region is accounted for and is found to have a significant influence on the F-region heating, especially due to variations in the D-region electron density during the experiment. It is found that the efficiency of F-region heating expressed in terms of the electron heating rate as a function of radio wave power flux is higher at higher transmitter powers. This behavior seems to be consistent with the development of geomagnetic field-aligned plasma density irregularities which are associated with the conversion of the radio wave to electrostatic upper-hybrid waves. At the highest power fluxes, the efficiency appears to be close to 100%.
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Journal of Geophysical Research-SPACE PHYSICS, 2012, 117Version
- VoR (Version of Record)
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Journal of Geophysical Research-SPACE PHYSICSPublisher
American Geophysical Union (AGU); Wileyissn
0148-0227Copyright date
2012Available date
2012-10-24Publisher DOI
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http://onlinelibrary.wiley.com/doi/10.1029/2011JA017267/abstractLanguage
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