Nonlinear low-frequency structures in an electron–positron–ion plasma
Lazarus, I. J.
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Nonlinear ion cyclotron and ion-acoustic waves have been studied in an electron–positron–ion plasma. Using Boltzmann distributions for the electrons and positrons and fluid equations for the ions, a set of nonlinear equations in the rest frame of the propagating wave is derived and numerically solved for the electric field. A scan of parameter space reveals a range of solutions for the parallel electric field, from sinusoidal to sawtooth to highly spiky waveforms. The results are compared with satellite observations.
S. Moolla, I. J. Lazarus and R. Bharuthram (2012). Nonlinear low-frequency structures in an electron–positron–ion plasma. Journal of Plasma Physics, 78, pp. 545-551. doi:10.1017/S0022377812000268.