Development of a DC bias structure with reduced RF leakage for suppressing the multipacting effect in the high power coaxial couplers

This paper presents an optimized design and preliminary test result of a high-power input coupler. The design is motivated by five-cell Petra-type cavities operating in the Southern Advanced Photon Sources booster. We optimize the design of the high-power input coupler from the prototype, including the window geometry redesign and multipacting analysis to meet a 250 kW operation power upgrade plan. The cooling system of the coupler is redesigned to achieve a low temperature in high-power operation. Design results fulfill the five-cell cavity operation requirement. The corresponding waveguide and coaxial transition structures are developed and tested. We also describe the coupler's coupling coefficient tests and high-power test plans.

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Development of a DC bias structure with reduced RF leakage for suppressing the multipacting effect in the high power coaxial couplers

Cited by 3 publications

References 10 publications

Low beta superconducting cavity system design for HIAF iLinac

Low beta superconducting cavity system design for HIAF iLinac

High power conditioning of RF couplers for the BISOL Linac

Design study and test of input coupler for 500 MHz five-cell cavity

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