Physics – Plasma Physics
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30vssc7b&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 22, pp. SSC 7-1, CiteID 2175, DOI 10.1029/2003GL017501
Physics
Plasma Physics
3
Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
This investigation studies the characteristics of electron cyclotron harmonic waves generated by almost monoenergetic perpendicular ion beams. Its motivation is twofold: (1) the new type of free energy source, beams made up of protons, alpha particles, and multiply ionized carbon, nytrogen or oxygen ions, has recently been observed in the geoplasma, and (2) the classical mechanism associated with the stimulation of these electrostatic modes is unable to explain some of their observed features, namely the fine structure sometimes seen in the emission bands and the occurrence of multiple harmonics with the higher branches lying above the upper hybrid frequency. The appropriate dispersion equation supports the developed analysis and determines the properties of this new excitation mechanism. Its characteristics contribute to overcome difficulties encountered by the standard paradigm in the interpretation of several types of electron Bernstein emissions.
Brinca Armando L.
Gomberoff Luis
Romeiras Filipe J.
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