Low-voltage infrared free-electron laser with gyrotron powered rf wigglers

摘要

Designs are presented for infrared free electron lasers (FELs) with rf wigglers and relatively low voltage electron beams. Both Quasi-optical and cavity gyrotrons are considered as sources for the wiggler. One of the most promising designs is the use of a quasi-optical gyrotron, where the radiation is coupled into a corrugated waveguide. This allows focusing of radiation, and propagation over relatively long paths, so that the FEL can be generated with fairly large wiggler parameter and gain.