F-region electron heating by X-mode radiowaves in underdense conditions

• Observations of modifications of the electron temperature in the F-region produced by powerful high frequency radiowaves at 4.04 MHz transmitted in X-mode are presented. The experiments were performed during quiet nighttime conditions with low ionospheric densities so no reflections occurred. Electron temperature enhancements of the order of 300-400K were obtained. Numerical simulation of ohmic heating by the pump wave reproduces both altitude profiles and temporal dependence of the temperature modifications in the experiments.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Ionosphere

Wave propagation

Radio science

Ionospheric propagation

Waves in plasma

induced ionospheric modifications

pump-enhanced airglow

eiscat

observations

optical-emissions

thermal response

energy transfer

hf

plasma

waves

temperatures

Physics

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)