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 $\pmb{1} \mathbf{MeV}/\pmb{5-7}\mathbf{kA}/\pmb{3\mu} \mathbf{s}$ . Electrodynamic system of this oscillator is based on a two-dimensional doubly-periodical structure., which combines the 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 the mechanism of two-dimensional 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 the possibility to achieve in the considered scheme a stable narrow-band regime of oscillation with the output power of the gigawatt level.
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