Free-Electron Laser with a Strong Axial Magnetic Field

Free-Electron Laser with a Strong Axial Magnetic Field

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 equ...

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Bibliographische Detailangaben
Veröffentlicht in:Phys. Rev. Lett.; (United States) 1980-06, Vol.44 (22), p.1456-1460
Hauptverfasser: Friedland, L., Hirshfield, J. L.
Format: Artikel
Sprache:eng
Schlagworte:
BEAMS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC FIELDS
ELECTRON BEAMS
ENERGY RANGE
ENGINEERING
EQUATIONS
EQUATIONS OF MOTION
FREE ELECTRON LASERS
GAIN
LASERS
LEPTON BEAMS
MAGNETIC FIELDS
ORBITS
PARTICLE BEAMS 420300 > Engineering-- Lasers-- (-1989)
RELATIVISTIC RANGE
RESONANCE
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Beschreibung
Zusammenfassung: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.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.44.1456