Nonlinear Alfvén waves

Details Nonlinear Alfvén waves Nonlinear Alfvén waves

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phst...60...32s&link_type=abstract

Physica Scripta, Volume 60, Issue , pp. 32-35 (1995).

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17

Scientific paper

Some important nonlinear effects involving Alfvén waves in plasmas are presented. For illustrative purposes, we start with small amplitude Alfvén waves and their relation with other low-frequency plasma modes. We then show that Alfvén and magnetosonic waves can be nonlinearly excited by a high-frequency external pump wave. Finite-amplitude Alfvén waves can either interact with the background plasma or with themselves, giving rise to a number of nonlinear phenomena such as wave- amplitude modulation or filamentation, density profile modification, as well as self-organization in vortical structures. The nonlinear effects that are described here are of relevance to the large-amplitude disturbances which are frequently observed in laboratory and space plasmas.

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