Development of Powerful W-band Planar Surface-Wave Oscillator driven by High-Current Relativistic Sheet Electron Beam

Abstract

Project of powerful planar W-band surface-wave oscillator is under development in collaboration between IAP RAS (N.Novgorod) and BINP RAS (Novosibirsk) at the “ELMI” accelerator 1 MeV / 5 - 7 kA / 3 μs. Electrodynamic system of this oscillator is based on a two-dimensional doublyperiodical structure, which combines properties of a slow-wave system that realizes conditions for an effective Cherenkov interaction with a high-current rectilinear sheet electron beam, and a high-Q resonator that implements mechanism of twodimensional distributed feedback and provides selective excitation of the operating mode in the strongly oversized interaction space. Design parameters of the project are discussed and results of the simulations are presented, which demonstrate possibility to achieve in the considered scheme a stable narrowband regime of oscillation with output power of the gigawatt level.