Efficiency Enhancement in Free-Electron Lasers Using a Tapered Axial Guide Field
- 12 March 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 52 (11), 926-929
- https://doi.org/10.1103/physrevlett.52.926
Abstract
A scheme for efficiency enhancement in free-electron lasers is described which employs a tapered axial guide field. An analytical description of this process is given in the strong-pump regime. The efficiency enhancement occurs in such a way that the axial velocity remains constant as kinetic energy is extracted from the beam. Results indicate that efficiency enhancements of as much as 100% are possible with only modest gradients in the axial field.Keywords
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