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TY - CONF AU - Wang, X.T. AU - Feng, L. AU - Lan, T. AU - Li, C.L. AU - Liu, B. AU - Zhang, M. AU - Zhang, W.Y. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Drive Laser Temporal Shaping Techniques for Shanghai Soft X-Ray Free Electron Laser J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - The design of Shanghai soft X-ray free electron laser (SXFEL) is based on laser driven photocathode, which can provide emittance <2.0 mm¿mrad with 500 pC charge. The temporal shape of drive laser has significant influence on the electron beam emittance and brightness. This paper presents the transport line of drive laser system and the temporal shaping techniques for SXFEL. This drive laser produces 8 picosecond 266nm ultraviolet pulses with repetition rate 10Hz. A transverse deflecting cavity was used for indirectly characterizing the laser pulse temporal structure. Here we present the drive laser system with its temporal shaping method, and measurement results. PB - JACoW Publishing CP - Geneva, Switzerland SP - 466 EP - 468 KW - laser KW - electron KW - FEL KW - cathode KW - flattop DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-WEP058 UR - http://jacow.org/fel2019/papers/wep058.pdf ER -