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TY - UNPB AU - Emma, P. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Status of the LCLS-II FEL Project at SLAC 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 - LCLS-II is a major new Free-Electron Laser (FEL) facility being built at SLAC, with collaborators from other US laboratories at ANL, Cornell, FNAL, LBNL, and TJNAF. This project aims to upgrade the operating LCLS-I facility by building a new 4-GeV superconducting RF (SRF) linac to provide continuous wave (CW) operation of two new FELs at beam rates of up to 1 MHz. The existing fixed-gap FEL undulator will be replaced by two new parallel adjustable-gap undulators providing an FEL spectral tuning range from 0.2 keV to 25 keV with average x-ray power levels approaching 1 kW. The existing 15-GeV copper linac in the last 3rd of the SLAC linac will be maintained as a low-rate, high-energy FEL driver in complementary operations with the new SRF linac. We present a brief status of the project, some of the latest test results, and thoughts on further facility expansion in the long term. PB - JACoW CP - Geneva, Switzerland ER -