Collective free-electron laser theory. Final report, 30 October 1985-30 July 1986

Technical Report · Mon Aug 01 00:00:00 EDT 1988

OSTI ID:6733467

Colson, W B

The long-pulse induction linac is considered for the first stage of a two-stage free electron laser (FEL) oscillator. This research effort studies several effects that can significantly influence the performance of such an FEL. The FEL is parameterized in a set of dimensionless variables that can summarize several physical effects without the use of detailed calculation as well as relating the physical to other FEL designs. A waveguide analysis shows the primary modifications on the FEL interaction, electron beam distribution functions representing energy spread and emittance are evaluated in the high gain regime, and a multimode analysis of the trapped-particle instability is performed for parameters describing the FEL. The research in intended to extend the simulation theory of high-gain FEL oscillators. In the two-stage FEL, the first-stage uses a normal FEL interaction with the usual static undulator to produce an intense electromagnetic wave in a high-power resonator. The wavelength in the first stage is around 1 cm, and provides the periodic undulator in the second stage of the interaction. The electromagnetic undulator has a shorter wavelength with a more intense field than can be attained from a static magnetic field, and allows the second stage to reach short optical wavelengths with a low energy electron beam.

• Research Organization: Berkeley Research Associates, Inc., CA (USA)
• OSTI ID: 6733467
• Report Number(s): AD-A-220750/4/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ACCELERATORS
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DISTRIBUTION FUNCTIONS
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ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREE ELECTRON LASERS
FUNCTIONS
GAIN
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LEPTON BEAMS
LINEAR ACCELERATORS
MAGNETIC FIELDS
MATHEMATICS
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PARAMETRIC ANALYSIS
PARTICLE BEAMS
PERFORMANCE
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STATISTICS
WAVEGUIDES