Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm51a2053k&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM51A-2053
Physics
Plasma Physics
[7836] Space Plasma Physics / Mhd Waves And Instabilities, [7863] Space Plasma Physics / Turbulence, [7868] Space Plasma Physics / Wave/Wave Interactions
Scientific paper
Turbulence driven by the parametric instability of the Alfven-ion-cyclotron (AIC) waves is investigated by using a particle-in-cell simulation method. The AIC waves with a broad range are excited by the anisotropic ion temperature. In addition, harmonic modes and upper sideband modes of AIC waves are found. In the longitudinal electrostatic fluctuations, the ion-acoustic (IA) waves and its second harmonic (IA2nd) modes are found. The mode coupling between the excited fluctuations is investigated by using the bicoherence analysis. It is also shown that the electrostatic field shows a single spectrum which corresponds to IA2nd waves, whereas density fluctuation shows a dual spectrum of IA and IA2nd waves. The charge neutrality condition normally applied for the IA mode breaks down for the IA2nd mode.
Kaang Helen H.
Rha K.
Rhee Tongnyeol
Ryu C.
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