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TY - CPAPER AU - Yao, Z.Y. AU - Laxdal, R.E. AU - Zvyagintsev, V. TI - Balloon Variant of Single Spoke Resonator J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 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 by recent test reports, consistent with modern 3D simulations. This paper will discuss MP behaviors in the single spoke resonator. 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’. A 325MHz β=0.3 single spoke resonator based on 'balloon' concept is under development by the RISP-TRIUMF Collaboration. The RF and mechanical design of this cavity will also be reported. PB - JACoW CY - Geneva, Switzerland SP - 1110 EP - 1114 KW - electron KW - resonance KW - simulation KW - cavity KW - superconductivity DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB021 UR - http://srf2015.vrws.de/papers/thpb021.pdf ER -