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M. Liepe, “Higher Order Modes in CW SRF Cavities and Very High Efficiency Nb3Sn SRF Cavities for Future Circular Colliders”, presented at the 58th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders (eeFACT'16), Daresbury, UK, Oct. 2016, paper WET2H6, unpublished.