Microwave Undulator Using a Helically Corrugated Waveguide

Microwave undulators (MUs) can be an alternative to the permanent magnet undulators in a free-electron laser. MUs normally employ a cavity-type structure that supports the standing wave to boost the electromagnetic field strength. In this paper, a waveguide-type MU based on a helically corrugated waveguide (HCW) that supports a traveling wave is studied. The use of the HCW allows partial conversio...