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Preparation and conditioning of the TTF VUV-FEL power couplers

Abstract : Recent advances in accelerator technology have permitted the manufacture of superconducting (SC) cavities with high gradients (> 30 MV/m). One ambitious aim now consists in making them operational in accelerator facilities (correctly matched to the RF source, preserve the cavity vacuum, cavity cleanliness and operating temperature conditions). The input power couplers have a crucial role in achieving all of these functions. Therefore, the input power couplers for these cavities are carefully designed and then prepared under very strict conditions. RF conditioning of input power couplers at room temperature is an important step in their preparation before mounting them on cavities. It allows one to test the robustness of the coupler, condition away residual absorbed gases and “burn-off” microscopic surface imperfections. The conditioning of the TTF-III couplers (for the TTF VUV-FEL accelerator at DESY) is an ideal occasion to learn about their properties and behaviour and to asses their suitability for the ILC, which will use cold RF technology. We will present the status of processing the TTF-III couplers at LAL-Orsay, an activity performed in close collaboration with DESY-Hamburg.
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  • HAL Id : in2p3-00077431, version 1




H. Jenhani. Preparation and conditioning of the TTF VUV-FEL power couplers. 12th International Workshop on RF Superconductivity, Jul 2005, Ithaca, United States. pp.ThP48. ⟨in2p3-00077431⟩



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