Abstract
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=8π n e0 T e/B 20 , 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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Malik, M., Sharma, R.P. & Singh, H.D. Ion-Acoustic Wave Generation by Two Kinetic Alfvén Waves and Particle Heating. Sol Phys 241, 317–328 (2007). https://doi.org/10.1007/s11207-007-0331-6
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DOI: https://doi.org/10.1007/s11207-007-0331-6