Development of powerful FEMS of X, KA and W bands for physical and industrial applications

The possibility to develop powerful FEMs capable for physical and industrial applications is being studied at Tel-Aviv University, IAP RAS, JINR and The University of Liverpool within the framework of the INTAS collaboration project. Present paper summarizes the progress in three successful FEM experiments: (1) Electrostatic-accelerator driven 70-130 GHz Tandem-FEM with kW-level pulse power (Tel-Aviv University); (2) Linac-driven 30-GHz FEM with pulse RF power of ∼ 20 MW (JINR + IAP RAS); (3) Sub-relativistic e-beam industrial FEM tunable over X-band with output power up 1 kW (The University of Liverpool).