Experimental study of a 33.3-GHz free-electron-laser amplifier with a reversed axial guide magnetic field
- 25 November 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 67 (22) , 3082-3085
- https://doi.org/10.1103/physrevlett.67.3082
Abstract
We report on a new regime of free-electron-laser operation with reversed axial guide magnetic field, in which the rotational motion of the electrons in the helical wiggler field is opposed by the presence of the uniform guide field. The 33.3-GHz free-electron-laser amplifier is driven by a mildly relativistic electron beam (750 kV, 300 A, 30 ns) and generates 61 MW of radiation with a 27% conversion efficiency. Measurements with the conventional orientation of the axial field show a considerable loss of power and efficiency.Keywords
This publication has 7 references indexed in Scilit:
- High-efficiency operation of free-electron-laser amplifiersIEEE Transactions on Plasma Science, 1988
- Nonlinear Power Saturation and Phase (Wave Refractive Index) in a Collective Free-Electron Laser AmplifierPhysical Review Letters, 1986
- Electron orbits in free-electron lasers with helical wiggler and axial guide magnetic fieldsIEEE Journal of Quantum Electronics, 1985
- Microwave studies of a tunable free-electron laser in combined axial and wiggler magnetic fieldsPhysics of Fluids, 1985
- High-Gain 35-GHz Free-Electron Laser-Amplifier ExperimentPhysical Review Letters, 1984
- Electron orbits and stability in realizable and unrealizable wigglers of free-electron lasersPhysical Review A, 1981
- Electron beam dynamics in combined guide and pump magnetic fields for free electron laser applicationsPhysics of Fluids, 1980