Leggieri, AlbertoBariou, DavidHermann, VirgileLegrand, FrancoisLietaer, GeraldLievin, ChristopheMarchesin, RodolpheThouvenin, PhilippeAlbajar, FerranSanchez, FranciscoAvramidis, Kostantinos A.Gantenbein, GerdIlly, StefanIoannidis, ZisisJelonnek, JohnJin, JianboPagonakis, Ioannis GrRzesnicki, TomaszThumm, ManfredAlberti, StefanoHogge, Jean-PhilippeAllio, AndreaDifonzo, RosaSavoldi, LauraChelis, IoannisTigelis, IoannisLatsas, GeorgeBin, WilliamBruschi, AlexFanale, Francesco2022-07-042022-07-042022-07-042021-01-0110.1109/IVEC51707.2021.9722467https://infoscience.epfl.ch/handle/20.500.14299/189020WOS:000803073000101This paper describes the status on the upgrade of the first European gyrotron prototype for ITER, manufactured by Thales. The upgraded prototype, TH1509U, is now being tested to verify the performance improvements and to assess the compliance with ITER ECRH requirements.Engineering, Electrical & ElectronicPhysics, AppliedEngineeringPhysicsech&cdgyrotronmillimeter wavestext::conference output::conference proceedings::conference paper