Physics
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10610519s&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue A6, p. 10519-10536
Physics
2
Ionosphere
Scientific paper
A quasi-linear Zakharov simulation model has been constructed to study intense Langmuir waves and precipitating field-aligned electrons observed in the auroral ionosphere at altitudes below 1000 km. This self-consistent model couples the magnetized Zakharov equations to a modified quasi-linear diffusion equation, which includes an advective term describing electrons streaming into the simulation region. Two-dimensional beam-driven simulations demonstrate that for the parameters of the auroral ionosphere below altitudes of 1000 km, Langmuir wave-wave and wave-particle interactions occur on similar timescales. The resulting reduced electron distribution has multiple shoulders and is a result of a balance between quasi-linear beam-flattening, wave-wave instabilities and beam replenishment due to streaming electrons.
Goldman Martin V.
Newman D. L.
Sanbonmatsu Kevin Yosh
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