Ion-Acoustic Wave Generation by Two Kinetic Alfvén Waves and Particle Heating

Details Ion-Acoustic Wave Generation by Two Kinetic Alfvén Waves and Particle Heating Ion-Acoustic Wave Generation by Two Kinetic Alfvén Waves and Particle Heating

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007soph..241..317m&link_type=abstract

Solar Physics, Volume 241, Issue 2, pp.317-328

Physics

11

Scientific paper

In this paper we have investigated the beat wave excitation of an ion-acoustic wave at the difference frequency of two kinetic (or shear) Alfvén waves propagating in a magnetized plasma with β<1 ( β=8 π n e0 T e/ B {0/2}, where n e0 is the unperturbed electron number density, T e is the electron temperature, and B 0 is the external magnetic field). On account of the interaction between two kinetic Alfvén waves of frequencies ω 1 and ω 2, the ponderomotive force at the difference frequency ω 1- ω 2 leads to the generation of an ion-acoustic wave. Also because of the filamentation of the Alfvén waves, magnetic-field-aligned density dips are observed. In this paper we propose that the ion-acoustic wave generated by this mechanism may be one of the possible mechanisms for the heating and acceleration of solar wind particles.

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