Hole Coupling in Free-Electron Lasers

TitleHole Coupling in Free-Electron Lasers
Publication TypeJournal Article
Year of Publication1993
AuthorsB. Faatz, R.WB Best, D. Oepts, P.W van Amersfoort
JournalIeee Journal of Quantum Electronics
Volume29
Number7
Pagination2229-2238
Date PublishedJul
ISBN Number0018-9197
Abstract

In this paper we present numerical simulations of the performance of a far-infrared Free Electron Laser with an aperture in the upstream cavity mirror. Two different applications of mirror apertures are studied: broadband extraction of radiation and injection of the electron beam. The emphasis is on the effect of the aperture on the amplitude of the higher-order transverse modes. It is shown that the mode distribution at saturation can be drastically influenced by variation of the mirror radius of curvature. A simple formula is derived which is quite useful to predict the dominant higher-order modes. This permits optimization of the cavity with respect to the application in question.

DOI10.1109/3.237498
PID

588293369b1e3b84a573970dc05b378e

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