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Simulation of superradiant free electron lasers

Authors
Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
0168-9002
Publisher
Elsevier
Publication Date
Volume
285
Identifiers
DOI: 10.1016/0168-9002(89)90453-1

Abstract

Abstract It has been suggested that slippage effects in a single-pass free electron laser can generate an output signal near the electron beam tail with a peak amplitude many times greater than the expected saturated value [1]. The growth of such “superradiant” pulses in a helical-wiggler FEL is characterized here using 1-D and 2-D numerical simulations. The 1-D calculations show the effects of detuning, energy spread, and the axial current distribution on superradiant pulses, while preliminary 2-D simulations illustrate the effects of betatron motion and the radial structure of the electron beam.

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