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TY - CONF AU - Czwalinna, M.K. AU - Boll, R. AU - Kirkwood, H. AU - Koliyadu, J. AU - Kral, J. AU - Lautenschlager, B. AU - Letrun, R. AU - Liu, J. AU - Müller, J. AU - Pallas, F. AU - Rivas, D.E. AU - Sato, T. AU - Schlarb, H. AU - Schulz, S. AU - Steffen, B. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Beam Arrival Stability at the European XFEL J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - Free electron laser facilities, such as the European XFEL, make increasingly high demands on the longterm temporal stability and uniformity of the electron bunches, as pump-probe experiments meanwhile aim for timing stabilities of few femtoseconds residual jitter only. For a beam-based feedback control of the linear accelerator, electro-optical bunch arrival-time monitors are deployed, achieving a time resolution better than 3 fs. In a first attempt, we recently demonstrated a beam-based feedback system, reducing the arrival time jitter of the electron bunches to the 10 fs level with stable operation over hours. For pump-probe experiments it is crucial to equally verify this new level of precision in the FEL pulse arrival time with independent methods. In this work, we are discussing first results from examining the facility-wide temporal stability at the European XFEL, with attention to the contributions of various sub-systems and on the different time scales. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3714 EP - 3719 KW - FEL KW - laser KW - timing KW - electron KW - feedback DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-THXB02 UR - https://jacow.org/ipac2021/papers/thxb02.pdf ER -