Spectral characteristics of a free electron laser with time-dependent beam energy
- 1 November 1990
- journal article
- conference paper
- Published by AIP Publishing in Physics of Fluids B: Plasma Physics
- Vol. 2 (11) , 2791-2797
- https://doi.org/10.1063/1.859349
Abstract
The spectral characteristics of a continuous beam free electron laser are studied both numerically and analytically. The average spectral width and the probability distribution of mode amplitudes determined from nonlinear numerical simulations are found to agree with a simple theory based on the linear growth of each mode in the presence of a white noise source. Included in the numerical simulation model is the time dependence of the beam energy and its effect on the spontaneous emission rate. Based on this model predictions of the frequency of observing a single dominant mode in the recent University of California at Santa Barbara experiments [FEL ’89, 11th International Conference on Free Electron Lasers, Conference Digest (IEEE), New York, 1989), Paper p. 2.19] are made. The predicted frequency is somewhat lower than observed. However, other features of the simulations do agree with experimental results.Keywords
This publication has 10 references indexed in Scilit:
- Nonlinear mode competition and coherence in low gain FEL oscillatorsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
- Mode competition and suppression in free electron laser oscillatorsPhysics of Fluids B: Plasma Physics, 1989
- Mode competition and control in free-electron-laser oscillatorsPhysical Review Letters, 1989
- Spontaneous and stimulated emission from quasifree electronsReviews of Modern Physics, 1988
- Multimode free electron laser with long electron pulses: effects of electron energy driftNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1987
- An analysis of self-amplified spontaneous emissionNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986
- Observation of Single-Mode Operation in a Free-Electron LaserPhysical Review Letters, 1986
- Multifrequency generation in free-electron lasers with quasi-optical resonatorsInternational Journal of Electronics, 1985
- Initiation of a Pulsed-Beam Free-Electron-Laser OscillatorPhysical Review Letters, 1983
- Nonstationary generation in free electron lasersOptics Communications, 1981