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TY - CONF AU - Williams, P.H. AU - Dunning, D.J. AU - Thompson, N. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Developments in the CLARA FEL Test Facility Accelerator Design and Simulations J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - We present recent developments in the accelerator design of CLARA (Compact Linear Accelerator for Research and Applications), the proposed UK FEL test facility at Daresbury Laboratory. The requirement to co-propagate the beam with laser seeds of very different wavelengths has led to a redesign of the section preceding the undulators, with a dogleg being replaced by a chicane. Additional refinements of the facility design include the inter-undulator sections. With this finalised design we show start to FEL simulations for all beam modes envisaged. PB - JACoW CP - Geneva, Switzerland SP - 2787 EP - 2789 KW - FEL KW - laser KW - undulator KW - simulation KW - optics DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-WEPAB090 UR - http://jacow.org/ipac2017/papers/wepab090.pdf ER -