This paper presents a review of the experimental achievements related to the development
of high-power gyrotron oscillators for long-pulse or CW operation and pulsed gyrotrons for …

Gyrotron oscillators (gyromonotrons) are mainly used as high power millimeter wave
sources for electron cyclotron resonance heating (ECRH), electron cyclotron current drive …

The power of electromagnetic emission near the plasma frequency during collective electron
beam-plasma interaction is found to be significantly increased in a plasma with preformed …

A spatially extended planar 75 GHz free-electron maser with a hybrid two-mirror resonator
consisting of two-dimensional upstream and traditional one-dimensional downstream Bragg …

Based on a quasioptical approach and direct particle-in-cell simulations, we study dynamics
of oversized relativistic surface-wave oscillators (SWOs) of the Cherenkov type with 2D …

We report of the implementation of a strongly oversized W-band surface-wave oscillator
(SWO) based on a 2D-periodical cylindrical slow-wave structure (2D SWS). In contrast to the …

A two-dimensional (2D), cylindrical, periodic surface lattice (PSL) forming a surface field
cavity is considered. The lattice is created by introducing 2D periodic perturbations on the …

A comprehensive study of the properties of electromagnetic eigenwaves propagating
perpendicular to the axis of symmetry in various cylindrical waveguide-structures filled with …

Experiments at the multimirror open trap as plasma emitter of THz radiation (GOL-PET)
facility have shown that the injection of a relativistic electron beam (REB) with a kiloampere …

A 1D nonlinear theory of a free electron laser (FEL) with a helical wiggler and an axial guide
magnetic field is developed based on averaged equations of the electron motion. By …