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TY - CONF AU - Ackermann, S. AU - Faatz, B. AU - Geloni, G. AU - Grattoni, V. AU - Hillert, W. AU - Lechner, C. AU - Paraskaki, G. AU - Serkez, S. AU - Tanikawa, T. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - High-Repetition-Rate Seeding Schemes Using a Resonator-Amplifier Setup J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - The spectral and temporal properties of Free-Electron Lasers (FEL) operating on the basis of self-amplified spontaneous emission (SASE) suffer from the stochastic behavior of the start-up process. Several so-called "seeding"-techniques using external radiation fields to overcome this limitation have been proposed and demonstrated. The external seed is usually generated by demanding, high-power laser systems, which are not available with a sufficient laser pulse energy at the high repetition rates of superconducting FEL facilities. In this contribution we discuss several seeding schemes that lower the requirements for the used laser systems, enabling seeded operation at high repetition rates by the means of a resonator-amplifier setup. PB - JACoW Publishing CP - Geneva, Switzerland SP - 222 EP - 225 KW - FEL KW - laser KW - electron KW - radiation KW - cavity DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-TUP073 UR - http://jacow.org/fel2019/papers/tup073.pdf ER -