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TY - CONF AU - Halavanau, A. AU - Decker, F.-J. AU - Ding, Y. AU - Emma, C. AU - Huang, Z. AU - Lutman, A.A. AU - Marcus, G. AU - Pellegrini, C. ED - Yamazaki, Yoshishige ED - Raubenheimer, Tor ED - McCausey, Amy ED - Schaa, Volker RW TI - Recent Developments in High Power High Brightness Double Bunch Self-Seeding at LCLS-II J2 - Proc. of NAPAC2019, Lansing, MI, USA, 01-06 September 2019 CY - Lansing, MI, USA T2 - North American Particle Accelerator Conference T3 - 4 LA - english AB - We discuss the power and spectral characteristics of an X-ray FEL, LCLS-II, operating in a double bunch self-seeding scheme (DBFEL). We show that it can reach very high power levels in the photon energy range of 4-8 keV. We discuss the system implementation on LCLS-II, including the design of a four-bounce crystal monochromator, and linac wakefields effects. Finally, we offer multiple applications of the DBFEL for high-field QED, AMO physics and single particle imaging. PB - JACoW Publishing CP - Geneva, Switzerland SP - 67 EP - 69 DA - 2019/10 PY - 2019 SN - 2673-7000 SN - 978-3-95450-223-3 DO - doi:10.18429/JACoW-NAPAC2019-MOZBA4 UR - http://jacow.org/napac2019/papers/mozba4.pdf ER -