Coherent light generators – Free electron laser
Patent
1984-01-25
1987-02-17
Scott, Jr., Leon
Coherent light generators
Free electron laser
372 37, H01S 300
Patent
active
046445480
ABSTRACT:
A free electron laser for emitting coherent radiation. The laser includes a wiggler magnet for producing a spatially periodic magnetic field in a drift region into which relativistic electrons are injected in a predetermined direction. An axial magnet is provided which generates an axial magnetic field parallel to the above predetermined direction. The axial field is tapered in field strength within a uniform wiggler region, wherein the wiggler field is of uniform and constant magnitude, such that the tapered field acts to oppose the change in axial electron velocity resulting from the free electron laser interaction as electrons travel through the drift region. The tapered axial field acts to enhance power output and efficiency.
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S. H. Gold et al., "Study of Gain, Bandwidth, and Tunability of a Millime-Wave Free-Electron Laser Operating in the Collective Regime", Phys. Fluids 26(9), Sep. 1983; pp. 2683-2688.
S. H. Gold et al., "Study of Gain, Bandwidth, and Tunability of a Millimeter-Wave Free-Electron Laser"; Digest of Technical Papers of the Seventh International Conference on Infrared and Millimeter Waves, 14-18, Feb. 1983, Marszille, France.
S. H. Gold et al., "Studies of Gain, Feedback, and Efficiency Enhancement in a Millimeter-Wave Free-Electron Laser"; IEEE Internation Conference on Plasma Science, May 23-25, 1983; San Diego, Calif.; pp. 26.
"Gain, Bandwidth, and Tunability of a High Power Millimeter-Wave Free-Electron Laser", by S. H. Gold, W. M. Black, V. L. Granatstein, H. P. Freund, and A. K. Kinkead, presented at Beams'83--The Fifth International Workshop on High Power Particle Beams, 12-14, Sep. 1983, San Francisco, Calif.
"Breakdown of the Atmosphere by Emission from a Millimeter-Wave Free-Electron Maser", by S. H. Gold, W. M. Black, V. L. Granatstein and A. K. Kinkead, Appl. Phys. Lett. 43, 922 (1983).
"Radiation Growth in a Millimeter-Wave Free-Electron Laser Operating in the Collective Regime", by S. H. Gold, W. M. Black, H. P. Freund, V. L. Granatstein, and A. K. Kinkead, Phys. Fluids, to be published.
"Studies of Gain and Spectrum of a Millimeter-Wave Free-Electron Laser Operating in the Collective Regime", by S. H. Gold, W. M. Black, H. P. Freund, V. L. Granatstein, and P. C. Efthimion, presented at the Fourth Workshop on Free-Electron Laser Devices, 27 Jun.-1, Jul. 1983, East-Sound, Wash.
Freund Henry P.
Gold Steven H.
Jr. Leon Scott
Lesniak Andrew M.
Sheinbein Sol
The United States of America as represented by the Secretary of
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