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TY - CPAPER AU - Gonin, I.V. AU - Khabiboulline, T.N. AU - Lunin, A. AU - Solyak, N. TI - Simulations of 3.9 GHz CW Coupler for LCLS-II Project J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - LCLS-II linac is based on XFEL/ILC superconducting technology. TTF-III fundamental power coupler for the 3.9 GHz 9-cell cavities has been modifies to satisfy requirements of LCLS-II, operating in CW regime. In this paper we discuss the results of COMSOL analysis of the possible modification of couplers, working at various operating regimes. We present also the results of mechanical study. PB - JACoW CY - Geneva, Switzerland SP - 1066 EP - 1069 KW - cavity KW - simulation KW - linac KW - operation KW - cryomodule DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB005 UR - http://srf2015.vrws.de/papers/thpb005.pdf ER -