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TY - CONF AU - Scholz, M. AU - Decking, W. AU - Li, Y. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Beam Based Alignment in all Undulator Beamlines at European XFEL J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - The Free Electron Laser European XFEL aims at delivering X-rays from 0.25 keV up to 25 keV out of three SASE undulators. A good overlap of photon and electron beams is indispensable to obtain good lasing performance, especially for the higher photon energies. Thus the quadrupole magnets in the undulators must be aligned as good as possible on a straight line. This can only be realized with a beam based alignment procedure. In this paper we will report on the method that was performed at the European XFEL. We will also discuss our results. PB - JACoW Publishing CP - Geneva, Switzerland SP - 592 EP - 595 KW - FEL KW - undulator KW - alignment KW - quadrupole KW - electron DA - 2019/11 PY - 2019 SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-THP002 UR - http://jacow.org/fel2019/papers/thp002.pdf ER -