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Proceedings Paper

Effects Of Gain Displacements On A Tapered Wiggler Free-Electron Laser
Author(s): Anup Bhowmik; Ralph A. Cover
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Paper Abstract

The performance of a low gain, free-electron laser (FEL) operating in the Compton regime is evaluated in the presence of e-beam displacements in planes parallel or perpendicular to the FEL linearly polarized wiggler magnetic field. In this fully coupled, nonlinear formalism, the gain is described by a 3-D extension of the Kroll-Morton-Rosenbluth (KMR) equations and evaluated by using optical fields that are propagated numerically between sections of the wiggler (and the oscillator) using the Gardner-Fresnel-Kirchhoff (GFK) algorithm. The oscil-lator extraction efficiency, optical gain, and the 3-D transverse mode and gain distributions are computed in the absence of slippage between the optical and e-beam pulses, using standard iterative techniques for obtaining resonator solutions. The influence of local off-axis magnetic fields and betatron oscillations on individual particles is included in the gain computations.

Paper Details

Date Published: 16 February 1984
PDF: 9 pages
Proc. SPIE 0453, Free-Electron Generators of Coherent Radiation, (16 February 1984); doi: 10.1117/12.947100
Show Author Affiliations
Anup Bhowmik, Rockwell International/Rocketdyne Division (United States)
Ralph A. Cover, Rockwell International/Rocketdyne Division (United States)

Published in SPIE Proceedings Vol. 0453:
Free-Electron Generators of Coherent Radiation
Charles A. Brau; Stephen F. Jacobs; Marlan O. Scully, Editor(s)

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