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Numerical investigations on the effects of geometrical parameters on free electron laser instability

Published online by Cambridge University Press:  01 December 2008

B. S. SHARMA  and
N. K. JAIMAN
B. S. SHARMA
Affiliation:
Department of Physics, Government P.G. College, Kota-324001, India (bs_phy@yahoo.com)
N. K. JAIMAN
Affiliation:
Department of Physics, University of Kota, Kota-324005, India
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Abstract

In this paper we numerically investigate the effects of various geometrical parameters of a backward wave oscillator (BWO), filled with a magnetized plasma of uniform density and driven by a mild relativistic solid electron beam, on the instability growth rate (Γ) of a free electron laser (FEL). The FEL instability is numerically calculated and the result is compared with the instability growth rate of an annular electron beam for the same set of parameters. The instability growth for a solid electron beam scales inversely to the seventh power of relativistic gamma factor γ0 and directly proportional to the corrugation amplitude.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 6 , December 2008 , pp. 741 - 747
Copyright
Copyright © Cambridge University Press 2008

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