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Proceedings Paper

Group synchronism and dispersive effects in a waveguide terahertz free-electron laser
Author(s): Naum S. Ginzburg; Ekaterina R. Kocharovskaya; Alexander S. Sergeev
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Paper Abstract

A theoretical model of a waveguide free-electron laser is developed which includes the mismatches of group and cavity synchronism conditions as well as the waveguide dispersion. Under the assumption of a high quality resonator, a parabolic equation for the evolution of the profile of electromagnetic pulse is derived. The condition of self-excitation and the parameters of stationary generation are found. It is shown that the waveguide dispersion makes it possible the operation of free-electron laser not only under positive but also under negative mismatch between the period of electron bunch injection and the period of electromagnetic pulse round trip. The transient and nonlinear stages of the free-electron laser operation are analyzed, and the optimal mismatches of group and cavity synchronism conditions are found, ensuring, in particular, utmost efficient generation of the terahertz pulses.

Paper Details

Date Published: 19 May 2006
PDF: 8 pages
Proc. SPIE 6257, ICONO 2005: Nonlinear Laser Spectroscopy, High Precision Measurements, and Laser Biomedicine and Chemistry, 62570H (19 May 2006); doi: 10.1117/12.678362
Show Author Affiliations
Naum S. Ginzburg, Institute of Applied Physics (Russia)
Ekaterina R. Kocharovskaya, Institute of Applied Physics (Russia)
Alexander S. Sergeev, Institute of Applied Physics (Russia)


Published in SPIE Proceedings Vol. 6257:
ICONO 2005: Nonlinear Laser Spectroscopy, High Precision Measurements, and Laser Biomedicine and Chemistry
Sergey N. Bagayev; Andrey Chikishev; Alexander Dmitriev; Martial Ducloy; Tony Heinz; Vladilen Letokhov; Alexander Shkurinov; Hiroaki Takahashi, Editor(s)

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