FastFind »   Lastname: doi:10.1029/ Year: | Advanced Search  

AGU: Geophysical Research Letters

 

Keywords

  • ionospheric modification
  • mode conversion
  • magnetic zenith effect

Index Terms

  • Ionosphere: Active experiments
  • Space Plasma Physics: Nonlinear phenomena
  • Radio Science: Waves in plasma
  • Radio Science: Radio wave propagation

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L24105, 4 PP., 2009
doi:10.1029/2009GL041438

Self-focused radio frequency L wave pumping of localized upper hybrid oscillations in high-latitude ionospheric plasma

T. B. Leyser

Swedish Institute of Space Physics, Uppsala, Sweden

E. Nordblad

Swedish Institute of Space Physics, Uppsala, Sweden

In experiments on radio frequency pumping of ionospheric plasma it is usually assumed that the pump wave propagates in the ordinary (O) mode. However, it is shown by ray tracing that commonly excited filamentary density inhomogeneities will guide a transmitted O-mode pump wave along the geomagnetic field as an L wave. Nonlinearly guided L-wave pumping of long predicted localized upper hybrid oscillations offers a unified understanding of a range of experimental results, including strong self-focusing for pump beams near geomagnetic zenith.

Received 26 October 2009; accepted 30 November 2009; published 31 December 2009.

Citation: Leyser, T. B., and E. Nordblad (2009), Self-focused radio frequency L wave pumping of localized upper hybrid oscillations in high-latitude ionospheric plasma, Geophys. Res. Lett., 36, L24105, doi:10.1029/2009GL041438.

Cited By

Please wait one moment ...