Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3624105l&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 24, CiteID L24105
Physics
Plasma Physics
3
Ionosphere: Active Experiments, Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Radio Science: Waves In Plasma (7867), Radio Science: Radio Wave Propagation
Scientific paper
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.
Leyser T. B.
Nordblad E.
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