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Scattering of circularly polarized electromagnetic waves off a straight electron beam propagating along a constant magnetic field

Published online by Cambridge University Press:  13 March 2009

Alexander Bogdanov
Alexander Bogdanov
Affiliation:
Institute of Mechanics and Biomechanics, Bulgarian Academy of Sciences, Akad. Bontchev str., bl. 4, Sofia 1113, Bulgaria
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Abstract

The stability of straight field-aligned electron beams, immersed in an external magnetic field of finite magnitude, with respect to the excitation in them of circularly polarized (spiral) electromagnetic waves is a problem calling for detailed investigation, particularly in the context of the study and development of free-electron lasers. Traditionally the problem is treated using the theory of electromagnetic waves scattering off electron-beam density oscillations. This is done, however, without considering the inverse influence of the beam on the dispersion properties of the electromagnetic waves. On the other hand, it is well known that the presence of the beam introduces substantial changes in the characteristics of the electromagnetic waves interacting with the beam, and, moreover, this results in the appearance of radically new types of waves that are entirely absent in free space. The paper is dedicated to the study of the nonlinear dynamics of the interaction of such radically changed electromagnetic waves with the beam density oscillations.

Type
Research Article
Information
Journal of Plasma Physics , Volume 46 , Issue 2 , October 1991 , pp. 201 - 207
Copyright
Copyright © Cambridge University Press 1991

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