TY - CPAPER AU - McKenzie, J.W. AU - Brynes, A.D. AU - Militsyn, B.L. TI - Front End Simulations and Design for the CLARA FEL Test Facility J2 - Proc. of FEL2015 AB - We present the design and simulations of the Front End for CLARA (Compact Linear Accelerator for Research and Applications), the proposed UK FEL test facility at Daresbury Laboratory. This is based around an S-band RF photocathode gun. Initially this will be the 2.5 cell gun, currently used on VELA facility at Daresbury, which is limited to 10 Hz repetition rate. Later, this will be up-graded to a 1.5 cell gun, currently under development, which will allow repetition rates of up to 400 Hz to be reached. The beam will be accelerated up to 50 MeV with a booster linac which will be operated in both bunching and boosting modes for different operating regimes of CLARA. Simulations are presented for a currently achieved performance of the RF system and drive laser with optimisation of the laser pulse lengths for various operational modes of CLARA. PB - JACoW CY - Geneva, Switzerland SP - 171 EP - 175 KW - laser KW - emittance KW - gun KW - linac KW - simulation DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-MOP057 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop057.pdf ER -