Modern Hiqh Power Electron Tubes

High frequency power in the kW to MW range is increasingly used today for high energy physical research as in particle accelerators and in fusion studies. F. i. such power levels are applied at 28 140 GHz for electron cyclotron resonance heating of magnetically confined plasmas. But also at lower frequencies as f. i. industrial equipment they are of growing interest. These high powers can only be generated in electron tubes since semiconductor devices cannot tolerate the rather high loss power associated with the high frequency generation.