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Relativistic nonlinear plasma waves in a magnetic field

Published online by Cambridge University Press:  13 March 2009

C. F. Kennel  and
R. Pellat
C. F. Kennel
Affiliation:
Centre de Physique Theorique de l' Ecole Polytechnique17, rue Descartes 75230 Paris Cedex 05
R. Pellat
Affiliation:
Centre de Physique Theorique de l' Ecole Polytechnique17, rue Descartes 75230 Paris Cedex 05
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Abstract

We study five relativistic plane nonlinear waves: circularly polarized waves and electrostatic plasma oscillations propagating parallel to the magnetic field, relativistic Alfvén waves, linearly polarized transverse waves propagating in zero magnetic field, and finally the relativistic analogue of the extraordinary mode propagating at an arbitrary angle to the magnetic field. When the ions are driven relativistic, they behave like electrons, and the assumption of an ‘electron–positron’ plasma guides us to equations which have the form of a one dimensional potential well. Our solutions indicate that a large-amplitude super luminous wave determines the average plasma properties, and not vice versa. For example, linearly polarized waves impose a plasma number flux equal to the relativistic addition of Nc/β and NVE, where N is the density, c the speed of light, β (>1) the ratio of the phase speed to c and VE the E × B speed measured in the frame moving with speed c/β with respect to the frame in which the phase speed is measured. The implications for cosmic ray acceleration in pulsar magnetospheres are considered.

Type
Research Article
Information
Journal of Plasma Physics , Volume 15 , Issue 3 , June 1976 , pp. 335 - 355
Copyright
Copyright © Cambridge University Press 1976

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References

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