The studies on mode interaction in gyrotrons had always been an active field of research
due to their theoretical and practical importance for better understanding of the underlying …

Long-term options for a steady-state DEMOnstration power plant may require the availability
of gyrotrons with an operating frequency significantly above 200 GHz together with an RF …

Basic wave-particle interaction dynamics from linear to chaotic regimes is experimentally
studied on a frequency tunable gyrotron generating THz radiation in continuous mode (200 …

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 …

In harmonic gyrotrons, the narrow operating region of the harmonic mode is significantly
restricted by the severe mode competition from the fundamental parasitic modes, which …

For the development of a DEMOnstration Fusion Power Plant the design of auxiliary heating
systems is a key activity in order to achieve controlled burning plasma. The present heating …

Gyrotron R&D within the EUROfusion Work Package Heating and Current Drive (WPHCD) is
addressing the challenging requirements posed on gyrotrons by the European concept for a …

High frequency (> 230 GHz) megawatt-class gyrotrons are planned as RF sources for
electron cyclotron resonance heating and current drive in DEMOnstration fusion power …

The progress in the development of the European 170 GHz, 1 MW/CW gyrotron for electron
cyclotron heating & current drive (ECH&CD) on ITER is reported. A continuous wave (CW) …

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) …