Physics – Plasma Physics
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1367s&link_type=abstract
Journal of Geophysical Research (Space Physics), Volume 107, Issue A11, pp. SSH 10-1, CiteID 1367, DOI 10.1029/2001JA009208
Physics
Plasma Physics
2
Space Plasma Physics: Waves And Instabilities, Interplanetary Physics: Mhd Waves And Turbulence, Space Plasma Physics: Wave/Particle Interactions, Interplanetary Physics: Planetary Bow Shocks, Interplanetary Physics: Solar Wind Plasma
Scientific paper
The nonlinear problem of MHD wave excitation in plasma by an ion beam with a ring distribution function was solved. We studied how the steepened wave profiles grew out of low-frequency Alfvén fluctuations excited by the ion beam in plasma. Two types of nonlinearities are taken into account: (1) strong nonlinearity of resonant ions (beam ions) due to trapping and bounce-oscillation effects and (2) weak nonlinearity of nonresonant particles (plasma particles) that leads to mode coupling and steepening of the wave profile. The spectral method in concert with a hybrid method of resonant simulation was used in this study. The wave excitation, saturation, and subsequent nonlinear evolution were studied.
Galinsky V. L.
Ride S. K.
Shevchenko V. I.
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