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Nonlinear low-frequency structures in an electron–positron–ion plasma

Published online by Cambridge University Press:  20 March 2012

S. MOOLLA,
I. J. LAZARUS and
R. BHARUTHRAM
S. MOOLLA
Affiliation:
School of Chemistry and Physics, University of KwaZulu-Natal, Durban, 4000, South Africa (moollas@ukzn.ac.za)
I. J. LAZARUS
Affiliation:
Department of Mathematics, Statistics and Physics, Durban University of Technology, Durban, 4000, South Africa
R. BHARUTHRAM
Affiliation:
Office of the Deputy Vice Chancellor, University of the Western Cape, Modderdam Road, Belville, 7535, South Africa
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Abstract

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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.

Information

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 5 , October 2012, pp. 545 - 551
Copyright
Copyright © Cambridge University Press 2012

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