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TY - CONF AU - Lechner, C. AU - Ackermann, S. AU - Azima, A. AU - Aßmann, R.W. AU - Biss, H. AU - Drescher, M. AU - Faatz, B. AU - Grattoni, V. AU - Hartl, I. AU - Hartwell, S.D. AU - Hillert, W. AU - Ivanov, R. AU - Khan, S. AU - Laarmann, T. AU - Lang, T. AU - Miltchev, V. AU - Mohammad Kazemi, M.M. AU - Paraskaki, G. AU - Przystawik, A. AU - Roßbach, J. AU - Zheng, J. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Seeding R&D at sFLASH J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - Free-electron lasers (FELs) based on the self-amplified spontaneous emission (SASE) principle generate photon pulses with typically poor longitudinal coherence. FEL seeding techniques greatly improve longitudinal coherence by initiating FEL amplification in a controlled way using coherent light pulses. The sFLASH experiment installed at the FEL user facility FLASH at DESY in Hamburg is dedicated to the study of external seeding techniques. In this paper, the layout of the sFLASH seeding experiment is presented and an overview of recent developments is given. PB - JACoW Publishing CP - Geneva, Switzerland SP - 230 EP - 233 KW - electron KW - laser KW - FEL KW - free-electron-laser KW - experiment DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-TUP076 UR - http://jacow.org/fel2019/papers/tup076.pdf ER -