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Ben Spencer

HEP Christmas meeting. Accelerators. Ben Spencer. ILC Superconducting Accelerating Cavities. Optimize cavity design to minimize destructive Higher Order Modes (HOMs). Simulation (HFSS) and measurement (TTF at DESY/ ERLP at Daresbury). HFSS Simulation. Crab Cavity. Current Project.

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Ben Spencer

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  1. HEP Christmas meeting Accelerators Ben Spencer

  2. ILC Superconducting Accelerating Cavities Optimize cavity design to minimize destructive Higher Order Modes (HOMs). Simulation (HFSS) and measurement (TTF at DESY/ ERLP at Daresbury)

  3. HFSS Simulation Crab Cavity

  4. Current Project • Nose-coned cavity • Vary iris radius, keeping resonant frequency constant • Maximize the shunt impedance for the cavity • Less power/ number of cells required • Square vs. elliptical cavity

  5. Measurements at TTF / FLASH • HOMs give beam positioning • Cavity and cell misalignment January 7th – 24th Example HOM coupler at BNL

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