Three-dimensional theory of free electron lasers with an axial guide field

Three-dimensional theory of free electron lasers with an axial guide field

The collective interaction in a free electron laser with a combined helical wiggler and uniform axial guide field is presented in the low-gain regime. The wiggler model we employ is fully self-consistent and includes all transverse inhomogeneities. The analysis is performed for a free electron laser...

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Veröffentlicht in:IEEE J. Quant. Electron.; (United States) 1983-03, Vol.19 (3), p.322-327
Hauptverfasser: Freund, H., Johnston, S., Sprangle, P.
Format: Artikel
Sprache:eng
Schlagworte:
420300 - Engineering- Lasers- (-1989)
AMPLIFIERS
AXIAL SYMMETRY
DOPPLER EFFECT
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
Electron beams
ELECTRONIC EQUIPMENT
ENGINEERING
FREE ELECTRON LASERS
INHOMOGENEOUS FIELDS
Laser modes
Laser theory
LASERS
Magnetic fields
MAGNETS
Orbits
Plasma applications
Resonance
SYMMETRY
Tellurium
Undulators
WAVEGUIDES
WIGGLER MAGNETS
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Beschreibung
Zusammenfassung:The collective interaction in a free electron laser with a combined helical wiggler and uniform axial guide field is presented in the low-gain regime. The wiggler model we employ is fully self-consistent and includes all transverse inhomogeneities. The analysis is performed for a free electron laser (FEL) amplifier in which the radial dependence of the radiation is treated using both the TE and TM waveguide modes. Substantial discrepancies are found to exist between the results for the realizable and ideal wigglers, and a selection rule relating the TE ln and TM ln modes with resonant amplification at the l th harmonic of the FEL Doppler upshift.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.1983.1071848