In anticipation of an Electron Cyclotron Resonance Heating system upgrade for the
stellarator Wendelstein 7-X, a 1.5 MW-140 GHz continuous-wave gyrotron is under …

For the required upgrades of the Electron Cyclotron Resonance Heating system at the
stellarator Wendelstein 7-X, the development of a 1.5 MW 140 GHz Continuous Wave (CW) …

For a few years the multi-physics modelling of the resonance cavity (resonator) of MW-class
continuous-wave gyrotrons, to be employed for electron cyclotron heating and current drive …

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 order to study parasitic oscillation that may occur in a realistic beam duct upstream to the
gyrotron cavity, the self-consistent linear and spectral code TWANGlinspec has been …

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 …

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 …