The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Berrutti, P. AU - Gonin, I.V. AU - Khabiboulline, T.N. AU - Parise, M. AU - Passarelli, D. AU - Romanov, G.V. AU - Ruiu, F. AU - Sukhanov, A.I. AU - Yakovlev, V.P. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - New Design of SSR2 Spoke Cavity for PIP II SRF Linac 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 - Superconducting SSR2 spoke cavities provide acceleration of the H⁻ in PIP II SRF linac from 35 to 185 MeV. The RF and mechanical design of the SSR2 cavities has been completed and satisfies the technical requirements. However, our resent results of the high RF power tests of fully dressed SSR1 cavities show considerably strong multipacting (MP), which took significant time to process. On the other hand, the new results of the tests of balloon cavity showed significant mitigation of MP. In this paper we present the results of the improved design of the SSR2 cavity, based on the balloon cavity concept. The electromagnetic design is presented, including RF parameter optimization, MP simulations, field asymmetry analysis, High Order Mode (HOM) calculations. Mechanical analysis of the dressed cavity is presented also, which includes Lorentz Force Detuning optimization, and reduction of the cavity resonance frequency sensitivity versus He pressure fluctuations. The design completely satisfies the PIP II technical requirements. PB - JACoW Publishing CP - Geneva, Switzerland SP - 600 EP - 604 KW - cavity KW - quadrupole KW - multipactoring KW - linac KW - HOM DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP066 UR - http://jacow.org/srf2019/papers/tup066.pdf ER -