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Proceedings Paper

Numerical study of FEL pumped by electromagnetic wave
Author(s): Tianquan Deng; Hui Zhu; Zheng Liang; Shenggang Liu
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Paper Abstract

A theory of stimulated scattering of electromagnetic waves by high -current relativisitic electron beams is devoleped ,with the transverse inhomogeneity of incident and scattered waves , and the presence of a magnetic field of 20 kG focusing the particles taken into account. The nonlinear results including the cou pling coef ficient versus the longitudinal magnetic field and the radius of electron beam ,the excitation curves .powers and ef ficiency etc. are obtained on a set of input parameters of our recently establishing accelerator and FEL system with an electron energy of 600 keV and a current of 3 kA. It is shown that the electrodynamic system of backward wave oscillator ( BWO ) in the form of a cylindrical waveguide wit h a periodically corrugated wall can have a high Q-factor for oscillations at wavelengths much shorter than the corrugation period of 1. 95 cm and the wavelengths of incident pump waves. The relativistic 3. 2 cm backward wave oscillator provided powerf ul scattered radiation at 3- 8 mm with integral power of 30 M W and efficiency up to 1 3% .

Paper Details

Date Published: 1 April 1992
PDF: 10 pages
Proc. SPIE 1629, Intense Microwave and Particle Beams III, (1 April 1992); doi: 10.1117/12.137165
Show Author Affiliations
Tianquan Deng, Univ. of Electronic Science and Technology of China (China)
Hui Zhu, Univ. of Electronic Science and Technology of China (China)
Zheng Liang, Univ. of Electronic Science and Technology of China (China)
Shenggang Liu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 1629:
Intense Microwave and Particle Beams III
Howard E. Brandt, Editor(s)

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