Free-electron laser with a strong axial magnetic field

L. Friedland*, J. L. Hirshfield

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

A small-signal theory is given for gain in a free-electron laser comprising a cold relativistic electron beam in a helical periodic transverse, and a strong uniform axial, magnetic field. Exact finite-amplitude, steady-state helical orbits are included. If perturbed, these orbits oscillate about equilibrium, so that substantial gain enhancement can occur if the electromagnetic perturbations resonate with these oscillations. This gain enhancement need not be at the cost of frequency upshift.

Original languageEnglish
Pages (from-to)1456-1460
Number of pages5
JournalPhysical Review Letters
Volume44
Issue number22
DOIs
StatePublished - 1980
Externally publishedYes

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