Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51d1709p&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH51D-1709
Physics
Plasma Physics
[7839] Space Plasma Physics / Nonlinear Phenomena, [7863] Space Plasma Physics / Turbulence, [7867] Space Plasma Physics / Wave/Particle Interactions, [7868] Space Plasma Physics / Wave/Wave Interactions
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. Two-dimensional velocity and wave number spaces are considered within a nonlinear analysis, with physical parameters that characterize typical solar wind conditions. It is found that for a sufficiently high electron beam density, the nonlinear interaction produces quasi-isotropic electron population. The present findings 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
Viñas Adolfo F.
Yoon Peter H.
Ziebell L. F.
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