Physics – Plasma Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11112111g&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue A12, CiteID A12111
Physics
Plasma Physics
4
Interplanetary Physics: Mhd Waves And Turbulence (2752, 6050, 7836), Interplanetary Physics: Solar Wind Plasma, Space Plasma Physics: Electrostatic Structures, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Wave/Wave Interactions
Scientific paper
We consider a fast solar wind-type plasma consisting of electrons, a protons background, and a much more tenuous alpha particle beam. It is shown that such system is unstable against ion acoustic-like waves triggered by finite-amplitude left-hand polarized waves propagating in the direction of the interplanetary magnetic field. The ion acoustic-like waves have similar properties to those found in a plasma with a much denser proton beam (Gomberoff, 2006b). Although the alpha particle beam is much more tenuous than the proton beam, the system is equally able to trigger ion acoustic-like waves. Therefore we believe that this effect should be taken into account in the evolution of the fast solar wind.
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