Investigation of phase-locked diffraction radiation generator

A number of millimeter-wave measuring systems require high stability, high-power sources. New opportunities for the plasma diagnostics, high-resolution spectroscopy and coherent radar can provide a new type of high-stability medium-power electromagnetic oscillator: the Diffraction Radiation Generator (DRG). The operation of the DRG is based on the phenomenon of diffraction radiation (Smith-Purcell effect), in which an electron beam passing over a periodic structure (e.g. diffraction grating) radiates as a result of interaction with the grating. The emitted radiation is collected by a high-q open resonator that encloses the grating. To provide the frequency tuning in a wide range the second mirror of the open resonator is made movable