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TY - CONF AU - Hemsing, E. AU - Coffee, R.N. AU - Fawley, W.M. AU - Feng, Y. AU - Garcia, B.W. AU - Hastings, J.B. AU - Huang, Z. AU - Marcus, G. AU - Penn, G. AU - Ratner, D.F. AU - Raubenheimer, T.O. AU - Schoenlein, R.W. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Seeding Experiments and Seeding Options for LCLS II J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017 C1 - Santa Fe, NM, USA T2 - International Free Electron Laser Conference T3 - 38 LA - english AB - We discuss the present status of FEL seeding experiments toward the soft x-ray regime and on-going studies on possible seeding options for the high repetition soft x-ray line at LCLS-II. The seeding schemes include self-seeding, cascaded HGHG, and EEHG to reach the 1-2 nm regime with the highest possible brightness and minimal spectral pedestal. We describe relevant figures of merit, performance expectations, and potential issues. PB - JACoW CP - Geneva, Switzerland SP - 219 EP - 224 KW - ion KW - FEL KW - photon KW - electron KW - laser DA - 2018/02 PY - 2018 SN - 978-3-95450-179-3 DO - 10.18429/JACoW-FEL2017-TUB01 UR - http://jacow.org/fel2017/papers/tub01.pdf ER -