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TY - CONF AU - Li, X. AU - Boonpornprasert, P. AU - Chen, Y. AU - Georgiev, G.Z. AU - Good, J.D. AU - Groß, M. AU - Huang, P.W. AU - Isaev, I.I. AU - Koschitzki, C. AU - Krasilnikov, M. AU - Lal, S. AU - Lishilin, O. AU - Loisch, G. AU - Melkumyan, D. AU - Niemczyk, R. AU - Oppelt, A. AU - Qian, H.J. AU - Shaker, H. AU - Shu, G. AU - Stephan, F. AU - Vashchenko, G. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Progress in Preparing a Proof-of-Principle Experiment for THz SASE FEL at PITZ J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - A proof-of-princle experiment for a THz SASE FEL is undergoing preparation at the Photo Injector Test facility at DESY in Zeuthen (PITZ), as a prototype THz source for pump-probe experiments at the European XFEL, which could potentially provide up to mJ/pulse THz radiation while maintaining the identical pulse train structure as the XFEL pulses. In the proof-of-principle experiment, LCLS-I undulators will be installed to generate SASE radiation in the THz range of 3-5 THz from electron bunches of 16-22 MeV/c. One key design is to obtain the peak current of nearly 200 A from the heavily charged bunches of a few nC. In this paper, we report our simulation results on the optimization of the space charge dominated beam in the photo injector and the following transport line with two cathode laser setups. Experimental results based on a short Gaussian laser will also be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 41 EP - 44 KW - laser KW - FEL KW - undulator KW - experiment KW - flattop DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-TUP002 UR - http://jacow.org/fel2019/papers/tup002.pdf ER -