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Title: Nonlinear amplification in a second-harmonic waveguide free-electron laser
Authors: Zhong, Xiehe
Kong, Michael G.
Keywords: Free lectron lasers
Harmonic generation
Masers
Issue Date: 2002
Publisher: © IEEE
Citation: ZHONG, X. and KONG, M.G., 2002. Nonlinear amplification in a second-harmonic waveguide free-electron laser. IEEE Transactions on Plasma Science, 30(5), pt. 2, pp. 2059-2065.
Abstract: This paper describes the results of numerical simulation of second-harmonic waveguide free-electron lasers (FELs) from the small-signal regime to the large-signal regime. Aimed at reducing the size and hence the cost of compact waveguide FELs operated from the microwave to the far infrared, these unconventional waveguide FELs can substantially decrease the minimum electron energy required for strong FEL radiation at a given frequency while increasing the small-signal gain. This contribution focuses on their saturation behaviors, taking into consideration variation in wiggler field and electron-energy spread. Depending on the roundtrip power loss within the FEL cavity and the initial electron-energy spread, the computed relationship between interaction gain and in-cavity power can be used to maximize the output power at a given electron current. Furthermore, it is found that gain degradation due to electron-energy spread remains relatively unchanged regardless of radiation power and wiggler field.
Description: This article was published in the journal, IEEE Transactions on Plasma Science [© 2002 IEEE] and is also available at: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Version: Published
URI: https://dspace.lboro.ac.uk/2134/5221
ISSN: 0093-3813
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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