Physics – Plasma Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11312104g&link_type=abstract
Journal of Geophysical Research, Volume 113, Issue A12, CiteID A12104
Physics
Plasma Physics
11
Space Plasma Physics: Kinetic Waves And Instabilities, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Turbulence (4490), Space Plasma Physics: Wave/Particle Interactions (2483, 6984), Interplanetary Physics: Mhd Waves And Turbulence (2752, 6050, 7836)
Scientific paper
The full electromagnetic linear dispersion equation for kinetic Alfvén fluctuations in a homogeneous, isotropic, collisionless, Maxwellian electron-proton plasma is solved numerically in the long-wavelength limit. At propagation sufficiently oblique to the background magnetic field B o , the wave number dependence of the damping rate of such modes is summarized by an analytic expression which scales as k $\perp$ 2 k $\parallel$ where the subscripts denote directions relative to B o . This damping progressively (although not monotonically) increases with increasing electron and proton β, corresponding to four distinct damping regimes: nonresonant, electron Landau, proton Landau, and proton transit-time damping.
Borovsky Joseph E.
Gary Peter S.
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