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Generation of electromagnetic f pe and 2 f pe waves in the Earth's electron foreshock via linear mode conversion
Author(s) -
Yin L.,
AshourAbdalla M.,
ElAlaoui M.,
Bosqued J. M.,
Bougeret J. L.
Publication year - 1998
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 - 10.1029/98gl01989
Subject(s) - physics , foreshock , electromagnetic radiation , computational physics , reflection (computer programming) , harmonic , geophysics , plasma , optics , acoustics , geology , seismology , quantum mechanics , aftershock , computer science , programming language
This study examines the mode conversion from electrostatic to electromagnetic waves near the plasma frequency in the Earth's electron foreshock. The conversion and reflection coefficients are obtained by solving coupled differential equations in a weakly magnetized warm plasma with a longitudinal linear density gradient. Results indicate that the foreshock first harmonic electromagnetic emissions and the backward‐propagating Langmuir waves required for the generation of the second harmonic electromagnetic waves may be efficiently produced by the linear conversion process in an inhomogeneous plasma.