A high-power free electron laser using a short rayleigh length
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Authors
Colson, W.B.
Todd, A.
Neil, G.R.
Subjects
free electron laser
high power
Rayleigh length
high power
Rayleigh length
Advisors
Date of Issue
2001
Date
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Abstract
Free Electron Lasers (FELs) have always had the potential for high average power, since the laser medium
cannot be damaged and is transparent to all wavelengths while the exhaust heat is removed at the speed of light.
At MW power levels, the resonator mirrors of the oscillator are vulnerable to damage because of the small beam
size in the undulator. We present a description of an FEL that uses a resonator with a short Rayleigh length in
order to increase the mode area at the mirrors and reduce the intensity. The corresponding undulator must also
be short. The whole FEL system is designed to be compact and efficient, producing about 1 MW of power at
1à ´ m infrared wavelength using an electron beam of about 140 MeV with about 0.6A of recirculating average
current.
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Article
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Physics
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Funder
Work supported by the U. S. Department of Energy under contract DE-AC05-84-ER40150, the Office of Naval Research, the Commonwealth of Virginia, the Laser Processing Consortium, and Advanced Energy Systems.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.