Perpendicular scattering for electron beams by the electron/electron instability in solar electron bursts

Details Perpendicular scattering for electron beams by the electron/electron instability in solar electron bursts Perpendicular scattering for electron beams by the electron/electron instability in solar electron bursts

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11304s90s&link_type=abstract

Journal of Geophysical Research, Volume 113, Issue A4, CiteID A04S90

Physics

Plasma Physics

1

Space Plasma Physics: Wave/Particle Interactions (2483, 6984), Space Plasma Physics: Kinetic Waves And Instabilities, Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Interplanetary Physics: Plasma Waves And Turbulence, Interplanetary Physics: Solar Wind Plasma

Scientific paper

Energy dependence of electron pitch angle distributions in solar electron bursts is studied using both particle-in-cell simulations of the electron/electron instability and a time-of-flight model for streaming electrons. The simulations show that the electron/electron instability leads to a maximum of electron pitch angle width in electron kinetic energy. The energy where the maximum appears varies with electron beam parameters. The simulations further show that the maximum electron pitch angle width increases with increasing electron beam density. The time-of-flight effect which leads to positive slopes in electron velocity distributions implies that the probability of electron/electron instability growth in the solar wind depends on electron kinetic energy because of the presence of an electron halo distribution. It is concluded that the electron/electron instability induced by the time-of-flight effect is likely to yield a maximum electron pitch angle width near 1 keV.

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