Effects of electron prebunching on the radiation growth rate of a collective (Raman) free-electron laser amplifier
- 1 September 1988
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics
- Vol. 24 (9) , 1825-1828
- https://doi.org/10.1109/3.7122
Abstract
Experiments are reported on the effects of electron prebunching in a mildly relativistic, low-current (200-KV, 1-A) free-electron laser amplifier operating in the collective (Raman) regime at a frequency of approximately 10 GHz. Prebunching is established by injecting an electromagnetic wave into a bifilar helical wiggler and then transporting the bunched beam into a second magnetic wiggler region. The wave growth rate is deduced from measurements of the radiation intensity as a function of interaction length. Observations show that prebunching can increase the radiation growth rate manyfold as compared with a system without prebunching. Studies are presented both in the small-signal (linear) regime, and in the nonlinear (saturated) regime.Keywords
This publication has 9 references indexed in Scilit:
- Suppression of feedback oscillations in free-electron lasersIEEE Journal of Quantum Electronics, 1988
- Measurements of amplification and phase shift (wave refractive index) in a free-electron laserPhysics of Fluids, 1986
- The Orsay storage ring free electron laser: New resultsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986
- Nonlinear Power Saturation and Phase (Wave Refractive Index) in a Collective Free-Electron Laser AmplifierPhysical Review Letters, 1986
- Optimization of gyroklystron efficiencyPhysics of Fluids, 1986
- A new method for pumping an optical klystronNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1985
- Microwave studies of a tunable free-electron laser in combined axial and wiggler magnetic fieldsPhysics of Fluids, 1985
- End effects of a bifilar magnetic wigglerJournal of Applied Physics, 1984
- The Harmodotron—a Megavolt Electronics Millimeter Wave GeneratorJournal of Applied Physics, 1957