BASIC DESIGN CONSIDERATIONS FOR FREE-ELECTRON LASERS DRIVEN BY ELECTRON BEAMS FROM RF ACCELERATORS.

A. Gover, H. Freund, V. L. Granatstein, J. H. McAdoo, Cha Mei Tang

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

In this chapter, we have derived a design procedure and design criteria for free-electron lasers driven by electron beams from rf accelerators. We have also suggested a number of ways to reduce the oscillation-buildup time to reach saturation, or at least to reach a substantially high power level, as long as the short electron-beam pulse still lasts. One way to reduce this buildup time is to increase the single-path gain by using a waveguide for propagating the electromagnetic wave. This helps to reduce the FEL filling factor in cases when it would otherwise be small because of the wave diffraction. Another way is to inject a seed radiation wave into the cavity to provide an initial source radiation at a power level higher than the spontaneous emission. It is out of the scope of this chapter to derive the complete scaling laws of the FEL operating parameters and their optimization. Refs.

Original languageEnglish
Title of host publicationInfrared and Millimeter Waves
PublisherAcademic Press
Pages291-365
Number of pages75
Volume11
ISBN (Print)0121477118
StatePublished - 1984
Externally publishedYes

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