Lower hybrid wave cavities detected by the FREJA satellite

Details Lower hybrid wave cavities detected by the FREJA satellite Lower hybrid wave cavities detected by the FREJA satellite

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...101.5299p&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A3, p. 5299-5316

Physics

Plasma Physics

43

Space Plasma Physics: Nonlinear Phenomena, Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Turbulence

Scientific paper

Localized electrostatic wave packets in the frequency region of lower hybrid waves have been detected by the instruments on the FREJA satellite. These waves are often associated with local density depletions indicating that the structures can be interpreted as wave filled cavities. The basic features of the observations are discussed. On the basis of simple statistical arguments it is attempted to present some characteristics which have to be accommodated within an ultimate theory describing the observed wave phenomena. An interpretation in terms of collapse of nonlinear lower hybrid waves is discussed in particular. It is argued that such a model seems inapplicable, at least in its simplest form, by providing a timescale and a length scale which are not in agreement with observations. Alternatives to this model are presented.

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