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In particle accelerator components, parasitic resonances must be reducedbecause they heat up the equipment and cause beam instabilities. In this paper,a method for designing and characterizing Higher Order Mode (HOM) couplers forreducing such resonances in a broad bandwidth is proposed. A case study isconsidered for a specific component, called QuattroTank, showing geometricaldiscontinuities and thus causing significant electro-magnetic resonances.Results of numerical simulation and experimental emulation prove the capabilityof the proposed method to reduce the peaks and the $Q-factor of the resonances.

Reducing parasitic resonances in particle accelerators components by broadband Higher Order Mode couplers