Methodology for radiofrequency electromagnetic analysis in the engineering of ITER Electron Cyclotron Heating Upper Launcher.

• After a thorough research on the underlying physics, mathematical formulations and Computational Electromagnetic Methods, a complete radiofrequency electromagnetic analysis methodology has been developed to cover the specific needs of the ITER Electron Cyclotron Upper Launchers. • A key aspect of this methodology is its effective integration with the Upper Launcher end-to-end analysis process, enabling coupling the electromagnetic analysis with the thermo-structural analysis in order to consider the impact of the mirrors deformation on the deviations and distortions of the electromagnetic beams in subsequent analysis loops. • The proposed methodology covers all the aspects that require specific assessment – the main optical path analysis (ohmic losses), the spillover and stray radiation, together with the effect of the High Order Modes (HOM) – and is aimed to obtain the parameters of the electromagnetic beams injected into the plasma, but also to verify the structural integrity of mirrors and structures against the thermal loading. Framed in the Final Design of ITER Electron Cyclotron Upper Launchers, a methodology has been developed for performing robust, reliable and efficient electromagnetic analysis of the millimeter waves and their interaction with the quasi-optical elements, launcher structures and finally the plasma. After a thorough research on the physics, mathematical formulations and Computational Electromagnetic Methods, a complete RF-EM Analysis procedure has been defined, tailored to the specific needs of this project. Special focus has been placed on the integration of this electromagnetic analysis in the end-to-end analysis cycle of the Launcher. The integrated procedure allows coupling the electromagnetic analysis with the thermo-structural analysis, so perturbations of the electromagnetic beams due to mirrors deformation can be accounted for. This methodology is aimed to obtain the parameters of the electromagnetic beams injected into the plasma, but also to verify the structural integrity of mirrors and structures against ohmic heating and stray radiation. [ABSTRACT FROM AUTHOR]