Title :
High-efficiency operation of free-electron-laser amplifiers
Author :
Ganguly, A.K. ; Freund, H.P.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
A high-efficiency regime was studied for free-electron-laser (FEL) amplifier configurations that employ a helically symmetric wiggler and a uniform-axial-guide magnetic field. Efficiencies on the order of 50% are found to be possible in the presence of axial fields sufficiently strong that the Larmor period is shorter than the wiggler period. This operating regime is accessible for electron-beam energies greater than approximately 400 keV
Keywords :
electrodynamics; free electron lasers; 400 keV; Larmor period; electron-beam energies; free-electron-laser amplifiers; helically symmetric wiggler; high-efficiency regime; uniform-axial-guide magnetic field; Differential amplifiers; Electromagnetic waveguides; Electron beams; Frequency; Magnetic analysis; Magnetic fields; Magnetostatics; Operational amplifiers; Tellurium; Undulators;
Journal_Title :
Plasma Science, IEEE Transactions on
