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RIS citation export for FRCAA2: Balloon Single Spoke Resonator - A New Variant for Reduced Multipacting

AU  - Yao, Z.Y.
AU  - Laxdal, R.E.
ED  - Michel, Peter
ED  - Arnold, André
ED  - Schaa, Volker RW
TI  - Balloon Single Spoke Resonator - A New Variant for Reduced Multipacting
J2  - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019
CY  - Dresden, Germany
T2  - International Conference on RF Superconductivity
T3  - 19
LA  - english
AB  - Spoke resonators have been widely proposed and optimized for various applications. Good performance has been demonstrated by many cavity tests. Accompanying the great progress, the adverse impact of strong multipacting (MP) is also noted, consistent with modern 3D simulations. This paper will discuss MP behaviors in the single spoke resonator (SSR). In particular a phenomenological theory is developed to highlight the details of the geometry that affect MP. The analysis leads to an optimized geometry of a single spoke resonator defined here as the ’balloon’ geometry. TRIUMF has designed, fabricated and tested the first balloon SSR at 325 MHz and β=0.3. Cold tests proved the principle of the balloon concept, the elimination of MP barriers around the operational gradient. This paper will also report the details of the mechanical and RF design, the fabrication steps and recent cold test results.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
ER  -