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TY - CONF AU - Zhou, F. AU - Adolphsen, C. AU - Benwell, A.L. AU - Brown, G.W. AU - Colocho, W.S. AU - Ding, Y. AU - Dunning, M.P. AU - Grouev, K. AU - Huang, G. AU - Jacobson, B.T. AU - Liu, X. AU - Maxwell, T.J. AU - Sannibale, F. AU - Schmerge, J.F. AU - Smith, T.J. AU - Vecchione, T. AU - Wang, F.Y. AU - Zimmer, C.M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - First Commissioning of LCLS-II CW Injector Source J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The LCLS-II injector source includes a 186MHz CW rf-gun, a 1.3 GHz CW rf-buncher, a loadlock system for photocathode change, two main solenoids, and a few essential diagnostics. The electron beam is designed to operate at a high repetition rate, up to 1-MHz. Since summer of 2018 we started LCLS-II injector source commissioning immediately after the major installation was completed. Initial commissioning showed the rf-gun was severely contaminated with hydrocarbons and very limited power <600W could be fed into the gun cavity. After a few significant processes, we eventually removed the hydrocarbons and successfully delivered desired rf power of 80 kW to the gun. This paper reports first com-missioning results including gun bakeout and vacuum processing, CW RF-gun and buncher operation with nom-inal power, and measurements of rf stability and dark current. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2171 EP - 2173 KW - gun KW - cavity KW - operation KW - electron KW - vacuum DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS106 UR - http://jacow.org/ipac2019/papers/tupts106.pdf ER -