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TY - CPAPER AU - Khabiboulline, T.N. AU - Gonin, I.V. AU - Grimm, C.J. AU - Kumar, P. AU - Lunin, A. AU - Nicol, T.H. AU - Yakovlev, V.P. TI - Mechanical Optimization of High Beta 650 MHz Cavity for Pulse and CW Operation of PIP-II Project J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - The proposed design of the 0.8 GeV PIP-II SC Linac employs two families of 650 MHz 5-cell elliptical cavities with 2 different beta. The β=0.61 will cover the 185-500 MeV range and the β=0.92 will cover the 500-800 MeV range. In this paper we will present update of RF and mechanical design of dressed high beta cavity (β=0.92) for pulse regime of operation at 2 mA beam current. In previous CW version of PIP-II project the mechanical design was concentrated on minimization of frequency shift due to helium pressure fluctuation. In current case of pulse regime operation the main goal was Lorentz force detuning minimization. We present the scope of coupled RF-Mechanical issues and their resolution. Also detailed stress analysis of dresses cavity will be presented. PB - JACoW CY - Geneva, Switzerland SP - 1093 EP - 1096 KW - cavity KW - operation KW - simulation KW - resonance KW - cryomodule DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB014 UR - http://srf2015.vrws.de/papers/thpb014.pdf ER -