Physics – Plasma Physics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11501103p&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue A1, CiteID A01103
Physics
Plasma Physics
3
Space Plasma Physics: Turbulence (4490), Space Plasma Physics: Kinetic Waves And Instabilities, Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Space Plasma Physics: Wave/Particle Interactions (2483, 6984)
Scientific paper
The nonlinear interaction of a single or a bidirectional electron beam and a background plasma is analyzed on the basis of electrostatic weak turbulence theory. It is found that for a sufficiently high electron beam density, the nonlinear interaction produces quasi-isotropic electron population. This is in contrast to our previous finding in which a relatively low electron beam density was adopted, and for which complete isotropization was not achieved. The present finding may thus provide a possible explanation for the observed isotropic solar wind electron distribution within the context of electrostatic nonlinear theory involving Langmuir and ion-sound turbulence, without the resorting to additional mechanisms such as the pitch angle scattering by electromagnetic whistler turbulence.
Gaelzer R.
Pavan John
Yoon Peter H.
Ziebell L. F.
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