A slow wave free-electron laser

A simple calculation of a free-electron laser in the Compton regime that uses a dielectric-lined waveguide is presented. The introduction of a dielectric lining in a free-electron laser considerably reduces the requirements on beam voltage for generating a given frequency omega /sub 1/=k/sub 0/c/(1...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1989-08, Vol.17 (4), p.583-587
Main Authors: Tripathi, V.K., Liu, C.S.
Format: Article
Language:English
Subjects:
420300 - Engineering- Lasers- (-1989)
BEAM OPTICS
DIELECTRIC MATERIALS
Dielectrics
ELECTROMAGNETIC RADIATION
Electromagnetic refraction
Electromagnetic waveguides
Electromagnetism
electron and ion optics
ENGINEERING
Exact sciences and technology
FREE ELECTRON LASERS
Frequency
FREQUENCY MODULATION
Fundamental areas of phenomenology (including applications)
Laser beams
LASER RADIATION
LASERS
MATERIALS
MODULATION
Physics
PLASMA WAVES
Radiation by moving charges
RADIATIONS
Time of arrival estimation
Undulators
Voltage
Waveguide lasers
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Summary:A simple calculation of a free-electron laser in the Compton regime that uses a dielectric-lined waveguide is presented. The introduction of a dielectric lining in a free-electron laser considerably reduces the requirements on beam voltage for generating a given frequency omega /sub 1/=k/sub 0/c/(1 - v/sub b/ eta /c), where k/sub 0/ is the wiggler wave period eta is the effective index of refraction (1< eta < square root epsilon ) and epsilon is the permittivity. The system supports electromagnetic waves whose Poynting flux is largely concentrated in the dielectric; hence the electron beam is required to propagate close to the dielectric lining. The mode structure and dispersion behavior of the guiding system without the beam are discussed. a thin annular beam is introduced, and a perturbation theory is used to obtain the frequency and growth rate of radiation.< >
ISSN:0093-3813
1939-9375
DOI:10.1109/27.31196