Multi-ion-species effects on magnetosonic waves and energy transfer in thermal equilibrium plasmas

Details Multi-ion-species effects on magnetosonic waves and energy transfer in thermal equilibrium plasmas Multi-ion-species effects on magnetosonic waves and energy transfer in thermal equilibrium plasmas

2004-10-22

arxiv.org/abs/physics/0410210v1

Physics

Plasma Physics

12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)

Scientific paper

Magnetosonic waves propagating perpendicular to an external magnetic field are studied with attention to the effect of multiple ion species. First, power spectra of magnetic field fluctuations and autocorrelation functions in thermal equilibrium plasmas are numerically obtained. In a multi-ion-species plasma, besides $\omega \simeq kv_{\rm A}$ mode, numerous waves are present near many different ion cyclotron frequencies. The autocorrelation function of the quasi-mode consisting of these waves is not recovered to its initial value, owing to the phase mixing of these waves. Next, with particle simulations, evolution of a macroscopic perpendicular disturbance is investigated. In a multi-ion-species plasma, this disturbance is damped. The energy is transferred to from the magnetic field to the ions.

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