Title :
Pulsed undulators for high efficiency FEL oscillators usable in the visible spectrum
Author :
Leboutet, Hubert
Author_Institution :
CEA-DAM, Bruyeres le Chatel, France
Abstract :
The problem with reaching for high efficiencies in RF-linac-driven FELs (free-electron lasers) is to cross the perturbed region between small-signal and large-signal operation due to large phase shift variations. The author considers the FEL as a traveling-wave-tube (TWT) or the reverse of a tapered buncher as in an electron accelerator. The difference between a TWT is that the EM beam, instead of being guided inside a waveguide, is in free space.<>
Keywords :
electron accelerators; free electron lasers; linear accelerators; wigglers; EM beam; RF-linac-driven FELs; free-electron lasers; high efficiency FEL oscillators; phase shift variations; pulsed undulators; traveling-wave-tube; visible spectrum; Electron accelerators; Energy exchange; Impedance; Oscillators; Particle beams; Radio frequency; Space exploration; Steady-state; Undulators; Waveguide transitions;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.165095
