Zhong_Kong_2002_IEEE.pdf (251.56 kB)
Strong wiggler field assisted amplification in a second-harmonic waveguide free electron laser
journal contribution
posted on 2009-08-26, 11:19 authored by Xiehe Zhong, Michael G. KongAs a technique to reduce the size of compact
waveguide free electron lasers (FELs) operated from microwave
to the far infrared, a longitudinal interaction mechanism was
recently proposed to operate waveguide FELs at the second
harmonic. With a gain formulation based on Madey’s theorem
in the limit of small wiggler field, it was shown analytically that
second harmonic waveguide FELs can reduce significantly the
electron energy required for radiation at a given frequency.
As it is advantageous to operate second harmonic waveguide
FELs with strong wiggler field, Madey’s theorem is used here to
reformulate their interaction gain for strong wiggler fields up to
[....] with the axial electron velocity Taylor expanded
to the eighth order of the wiggler field. Given that Madey’s
theorem has not been established for second harmonic waveguide
FELs, their interaction gain is also formulated independently by
solving their pendulum equation without recourse to Madey’s
theorem. These two gain formulas are not analytically identical,
but numerically they lead to an excellent agreement over a wide
range of system parameters, thus confirming the applicability
of Madey’s theorem. The interaction analyses presented form a
thorough and detailed description of second harmonic waveguide
FELs in the small-signal regime and for wiggler field that is both
practical and beneficial.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
ZHONG, X. and KONG, M.G., 2002. Strong wiggler field assisted amplification in a second-harmonic waveguide free electron laser. IEEE Transactions on Plasma Science, 30(2), pt. 2, pp. 630-638.Publisher
© IEEEVersion
- VoR (Version of Record)
Publication date
2002Notes
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.ISSN
0093-3813Language
- en