The invention of the laser has resulted in many innovations, and the device has become
ubiquitous. However, the maser, which amplifies microwave radiation rather than visible …

Using the quasi-optical approach, we investigate wave propagation along the periodically
corrugated surfaces and their interaction with rectilinear relativistic electron beams (REBs) …

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 …

We demonstrate both theoretically and experimentally the possibility of correlating the phase
of a Cherenkov superradiance (SR) pulse to the sharp edge of a current pulse, when …

We present the results of experiments on generation of high-power superradiant (SR) pulses
by an extended electron bunch moving in a cylindrical surface-wave structure with two …

The first solid-state masers to operate at room-temperature and ambient air-pressure were
recently demonstrated using optically pumped spin-triplet states as the gain medium. In this …

The sheet beam vacuum electron device is an attractive choice for generating high-power
high-frequency microwave radiation. A millimeter-wave sheet beam backward wave …

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 …

The excitation of a surface wave cavity based on a two-dimensional periodic structure by an
energy source, such as relativistic electrons, results in stimulated, single frequency coherent …

Within the quasi-optical approach, we study nonlinear dynamics of co-axial and cylindrical
surface-wave oscillators with two-dimensional periodic gratings. Electromagnetic fields in …