Professor Jim Clarke of ASTeC, along with colleagues from the Cockcroft Institute have recently collaborated on a paper regarding the systematic study of a corrugated waveguide as a microwave undulator. The paper was published in the Journal of Synchrotron Radiation. (JSR)
Microwave undulators have great potential to be used in short-wavelength free-electron lasers. In this paper, the properties of a corrugated waveguide and its performance as an undulator cavity for a UK X-ray free-electron laser were systematically studied. The equations presented in this paper allow a fast estimation of the dimensions of the corrugated waveguide. An undulator cavity operating at 36 GHz designed for the HE11 and HE12 modes was investigated and the performance of both modes compared.
You can read the full paper here.