Title :
Tunable compact high power far-infrared grating free-electron laser
Author :
Hafizi, B. ; Sprangle, P. ; Fisher, A.
Author_Institution :
Div. of Plasma Phys., Naval Res. Lab., Washington, DC, USA
fDate :
10/1/1994 12:00:00 AM
Abstract :
The linear and nonlinear operation of a multiwave grating free-electron laser is described. The radiation is generated by the passage of an annular electron beam through a coaxial waveguide, the central conductor being in the form of a corrugated cylinder. The model includes the effects of self-field forces, beam emittance and gyromotion of electrons in a guide magnetic field. The efficiency is determined by numerical simulation and compared with analytical estimates. A compact source utilizing, for example, a high brightness beam from a carbon fibre electron gun, that is tunable in the wavelength band 35-55 μm with output in the kilowatt range, is shown to be feasible
Keywords :
coaxial waveguides; diffraction gratings; free electron lasers; submillimetre wave lasers; 35 to 55 mum; annular electron beam; beam emittance; coaxial waveguide; corrugated cylinder; far-infrared lasers; free-electron laser; gyromotion; high brightness beam; linear operation; multiwave grating; nonlinear operation; self-field forces; Coaxial components; Conductors; Electron beams; Free electron lasers; Gratings; Laser beams; Laser modes; Power lasers; Tunable circuits and devices; Waveguide lasers;
Journal_Title :
Plasma Science, IEEE Transactions on
