Physics – Plasma Physics
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10224387r&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue A11, p. 24387-24392
Physics
Plasma Physics
3
Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Nonlinear Phenomena, Space Plasma Physics: Numerical Simulation Studies
Scientific paper
The use of bicoherence has proved its efficiency in the analysis of nonlinear wave interactions. The method has been adapted to interpret the results of a simulation of the beam-plasma interaction, in a case of broadband spectra, where many unstable modes can be suspected to couple. As the interacting waves exhibit different polarizations (electrostatic and electromagnetic), the bicoherence has been modified into a cross bicoherence in order to test the coupling of different field components. The visualization of the result has been designed in order to evidence the couplings in terms of efficiency (high bicoherence) and energy (high power). The application of this method to the simulation results shows that quadratic wave interactions are effective; new helpful information is stressed in order to interpret the observed growth of large-scale magnetic fluctuations.
Belmont Gérard
Guéret B.
Lembege Bertand
Rezeau Laurence
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