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TY - CONF AU - Halavanau, A. AU - Decker, F.-J. AU - Ding, Y. AU - Emma, C. AU - Huang, Z. AU - Krzywiński, J. AU - Lutman, A.A. AU - Marcus, G. AU - Pellegrini, C. AU - Zhu, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Generation of High Peak Power Hard X-Rays at LCLS-II with Double Bunch Self-seeding J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We propose to use existing LCLS copper S-band linac double bunch infrastructure to significantly improve LCLS-II hard X-ray performance. In our setup, we use the first bunch to generate a strong seeding X-ray signal, and the second bunch, initially traveling off-axis, to interact with the seed in the amplifier undulator and generate a near TW, 15 fs duration X-ray pulse in the 4 to 8 keV photon energy range. We investigate, via numerical simulations, the required transverse beam dynamics and the four crystals X-ray monochromator to be added to the existing LCLS-II beamline and discuss the final properties of the hard X-ray pulses and their potential application in high intensity, high-field physics experiments, including QED above the Schwinger critical field. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1863 EP - 1866 KW - FEL KW - electron KW - photon KW - laser KW - undulator DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB088 UR - http://jacow.org/ipac2019/papers/tuprb088.pdf ER -