Linear gain of a free-electron laser with an electromagnetic wiggler and an axial-guide magnetic field

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.2007· OSTI ID:5055011

Freund, H P; Kehs, R A; Granatstein, V L

The small-signal gain for an electromagnetically pumped free-electron laser is calculated for an amplifier configuration which includes an axial-guide magnetic field. The large-amplitude electromagnetic wave acts like the magnetostatic wiggler in a conventional free-electron laser, and the expression for the gain is shown to reduce to the well-known result in the limit of a magnetostatic wiggler. Substantial enhancements in the gain are found when ..cap omega../sub 0/approx. =..gamma../sub 0/(..omega../sub w/+k/sub w/v/sub X/), where ..cap omega../sub 0/ is the axial gyrofrequency, ..gamma../sub 0/ is the relativistic factor for the electron beam, v/sub X/ is the axial velocity of the electron beam, and (..omega../sub w/,k/sub w/) are the frequency and wave vector of the electromagnetic wiggler.

• Research Organization: Science Applications International Corporation, McLean, Virginia 22102
• OSTI ID: 5055011
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
AUGMENTATION
AXIAL SYMMETRY
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FREE ELECTRON LASERS
GAIN
LASERS
MAGNETIC FIELDS
MAGNETS
PARAMETRIC ANALYSIS
SYMMETRY
WIGGLER MAGNETS