Tunable Compact High Power Far-Infrared Grating Free-Electron Laser

摘要

The linear and nonlinear operation of a multiwave grating free-electron laser isdescribed. 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 that is tunable in the band 35-55 micron with output in the kilowatt range is shown to be feasible. Free-electron laser, Compact, Tunable, Coaxial waveguide structure, Grating, Hollow beam.