The behavior of electron density and temperature during ionospheric heating near the fifth electron gyrofrequency
Permanent lenke
https://hdl.handle.net/10037/10867Dato
2017-01-27Type
Journal articleTidsskriftartikkel
Peer reviewed
Sammendrag
The experimental phenomena involving the changes in electron temperature and electron
density as a function of pump frequency during an ionospheric heating campaign at European Incoherent
Scatter near Tromsø, Norway, are reported. When the pump frequency is slightly above the fifth electron
gyrofrequency, the UHF radar observation shows some apparent enhancements over a wide altitude range in
radar echo, ion line, and electron density respectively, which are apparently altitude independent and
consistent temporally with the upshifting and spread of plasma line around the reflection altitude. However,
they do not, in fact, correspond to true increase in electron density. Based on some existing theories, some
discussions are presented to try to explain the above enhancements and the upshifting and spread of plasma
line. Even so, the mechanism remains to be determined. In addition, the observation also shows some
enhancements in electron temperature as a function of pump frequency around the reflection altitude of the
pump, which are dependent on the behavior of dispersion of the upper hybrid wave near the fifth
electron gyrofrequency.
Beskrivelse
Published by AGU. Copyright (2017) American Geophysical Union. Source at http://doi.org/10.1002/ 2016JA023121