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Nonlinear gain and threshold current variations in a periodically corrugated waveguide

Published online by Cambridge University Press:  07 December 2005

B. SHOKRI  and
S. HOUSHMANDYAR
B. SHOKRI
Affiliation:
Physics Department and Laser-Plasma Research Institute of Shahid Beheshti University, Tehran, Iran Institute for Studies in Theoretical Physics and Mathematics, PO Box 19395-5531, Tehran, Iran ([email protected])
S. HOUSHMANDYAR
Affiliation:
Physics Department and Laser-Plasma Research Institute of Shahid Beheshti University, Tehran, Iran
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Abstract

A rectangular periodically corrugated waveguide is considered in the exponential gain regime. In general, gain obeys a nonlinear cubic equation. In this paper it is solved numerically. Also the behavior of gain diagrams versus beam velocities for various parameters of the problem is surveyed. Furthermore, in the context of a slow-wave periodic structure oscillator, the threshold current which cause the system to be self-sustained, is obtained from a nonlinear cubic equation similar to the one obtained for gain, and the variation of its diagrams with other parameters is also considered.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 3 , June 2006 , pp. 409 - 418
Copyright
2005 Cambridge University Press

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