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TY - CONF AU - Gonnella, D. AU - Aderhold, S. AU - Burrill, A. AU - Daly, E. AU - Davis, G.K. AU - Grassellino, A. AU - Grimm, C.J. AU - Khabiboulline, T.N. AU - Marhauser, F. AU - Melnychuk, O.S. AU - Posen, S. AU - Ross, M.C. AU - Sergatskov, D.A. AU - Wilson, K.M. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - RF Performance of Nitrogen-Doped Production SRF Cavities for LCLS-II J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - The Linac Coherent Light Source II (LCLS-II) requires 280 9-cell superconducting RF cavities for operation in continuous wave mode. Two vendors have previously been selected to produce the cavities, Research Instruments GmbH and Ettore Zanon S.p.a. Here we present results from manufacturing and cavity preparation for the cavities constructed at these two vendors for LCLS-II. We show how the cavity preparation method has been changed mid-production in order to improve flux expulsion in the cavities and maintain high performance in realistic magnetic field environments (~5 mG). Additionally, we show that the nitrogen-doping process has been carried out successfully and repeatedly on over 70 cavities. PB - JACoW CP - Geneva, Switzerland SP - 1156 EP - 1159 KW - cavity KW - SRF KW - niobium KW - operation KW - accelerating-gradient DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-MOPVA128 UR - http://jacow.org/ipac2017/papers/mopva128.pdf ER -