Nonlinear Landau Damping and Formation of Magnetic Depressions: An IST Perspective

Details Nonlinear Landau Damping and Formation of Magnetic Depressions: An IST Perspective Nonlinear Landau Damping and Formation of Magnetic Depressions: An IST Perspective

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51d1726h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH51D-1726

Physics

Plasma Physics

[4455] Nonlinear Geophysics / Nonlinear Waves, Shock Waves, Solitons, [7836] Space Plasma Physics / Mhd Waves And Instabilities

Scientific paper

The damping of oblique Alfven waves is studied numerically through the derivative nonlinear Schrodinger (DNLS) equation with the addition of a nonlinear term used to model resonant particle interactions. In particular, the results are presented from the perspective of the inverse scattering transformation (IST) which provides a natural framework for representing and understanding the resulting dynamics. Multiple soliton interactions in the presence of damping are studied and are noted to include soliton pair coalescence and bifurcation. It is observed that an initial wave profile containing compressive solitons which are subject to nonlinear Landau damping will preferentially form a train of so-called dark solitons with a rarefactive magnetic field profile.

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