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Ray tracing of electrostatic waves in a hot plasma and its application to the generation of terrestrial myriametric radiation
Author(s) -
Horne R. B.
Publication year - 1988
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl015i006p00553
Subject(s) - physics , electromagnetic radiation , ray tracing (physics) , computational physics , wave propagation , radio wave , magnetic field , refraction , equator , plasma , radiation , optics , geophysics , latitude , quantum mechanics , astronomy
The first results from the program HOTRAY for ray tracing electrostatic and electromagnetic waves in a hot plasma are presented. The calculations are applied to the linear mode‐conversion window theory for the generation of Terrestrial Myriametric Radiation corresponding to a specific event observed by the DE‐1 satellite. Results show that backward propagating electrostatic waves can refract in a density gradient normal to the magnetic field to become Z‐mode waves and can have access to the radio window. During propagation the waves remain minimally damped. Variations of approximately 0.01° in the initial wave normal angle ψ can result in a large difference in the transmitted wave intensities. However, if such variations do occur, waves from different locations can still access the radio window so that energy transfer to the conversion point remains efficient. Strong refraction of electrostatic waves at latitudes > 1° show that the magnetic equator is the preferred location for mode conversion to take place.