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TY - CONF AU - Adolphsen, C. AU - Benwell, A.L. AU - Brown, G.W. AU - Dunning, M.P. AU - Gilevich, S. AU - Grouev, K. AU - Huang, G. AU - Johnson, M.J. AU - Liu, X. AU - Luo, T.H. AU - Sannibale, F. AU - Schmerge, J.F. AU - Vecchione, T. AU - Virostek, S.P. AU - Wang, F.Y. AU - Zhou, F. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Initial Operation of the LCLS-II Electron Source 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 - The Early Injector Commissioning program for LCLS-II aims to demonstrate CW electron beam production this year in the first two meters of the injector that includes the room-temperature 185.7 MHz single-cell gun and the 1.3 GHz two-cell buncher cavity. These cavities were designed and built by LBNL based on their experience with similar ones for their Advanced Photo-Injector Experiment (APEX) program. With the 258 nm laser system and Cs2Te cathodes, bunches of up to 300 pC are expected at rates as high as 1 MHz. The paper presents results from this program including the vacuum levels achieved, RF processing and field control experience, dark current measurements and laser and beam characterization. PB - JACoW Publishing CP - Geneva, Switzerland SP - 891 EP - 894 KW - gun KW - cavity KW - vacuum KW - cathode KW - operation DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP026 UR - http://jacow.org/srf2019/papers/thp026.pdf ER -