Measurements of amplification and phase shift (wave refractive index) in a free-electron laser
- 1 October 1986
- journal article
- conference paper
- Published by AIP Publishing in Physics of Fluids
- Vol. 29 (10) , 3461-3469
- https://doi.org/10.1063/1.865811
Abstract
Measurements of the amplification and phase shifts (wave refractive index) in a free-electron laser (FEL) are reported. The studies have been carried out at microwave frequencies (7–16 GHz) in a free-electron laser operating in the collective (Raman) regime, using a mildly relativistic electron beam with energy of ∼160 keV, and current of ∼5 A. The observations are found to be in excellent agreement with theoretical predictions based on the full three-dimensional FEL dispersion relation.Keywords
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