Lossy dielectric materials are used in gyrotron beam tunnels to suppress possible parasitic
oscillations by raising their starting currents. The dependence of the overall losses of the …

High-power gyrotrons may suffer from parasitic oscillations that are excited in the electron-
beam compression zone. Different damping structures are proposed in the literature that …

With the help of special edge structures, which correspond to the so-called Schroeder phase
gratings, the electromagnetic field in a cylindrical waveguide can be perturbed in such a way …

In 100-MW level relativistic gyrotrons driven by explosive emission cathodes (EECs),
significant parasitic oscillations are caused by the high beam current and the large beam …

In this work, a novel measurement system for the analysis of the gyrotron RF output
spectrum was developed. It enables unprecedented time dependent measurements within a …

High-power gyrotrons usually suffer from parasitic oscillations, appearing in the beam tunnel
region, which degrade the electron beam quality and the interaction efficiency in the cavity …

Parasitic oscillations frequently appear in several modern gyrotron beam tunnels. In this
paper, the CST Studio Suite is used to study the performance of dielectric-loaded beam …

Modern gyrotron beam tunnels are rather complicated structures designed to enhance the
suppression of the parasitic oscillations, which may be excited there. In some beam tunnel …

In this work an open-ended coaxial cavity with a corrugated insert and a relatively small
number of corrugations on the outer wall is studied. In particular, the Spatial Harmonics …

High-power high-frequency gyrotrons are required for several applications, including
plasma heating, current drive, and plasmas stabilization for controlled thermonuclear fusion …