This report presents an update of the experimental achievements published in the review
“State-of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared …

The upgraded European 1-MW, 170-GHz continuous wave (CW) industrial prototype
gyrotron (TH1509U) for electron cyclotron resonance heating and current drive in ITER was …

An innovative cooling strategy for the mirrors of the transmission line of the electron
cyclotron heating (ECH) of a fusion research reactor, the divertor tokamak test (DTT) facility …

The Divertor Tokamak Test (DTT) facility, whose construction has started in Frascati (Italy),
will be equipped with an ECRH (electron cyclotron resonance heating) system including 32 …

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 …

Abstract The European DEMO (EU-DEMO) reactor studies within EUROfusion aim to
develop a fusion power plant concept. The large tokamak device needs an auxiliary heating …

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 …

The proper alignment of the electron beam with the interaction cavity is essential in order to
achieve efficient operation of modern high-power, high-frequency gyrotrons. However …