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TY - CONF AU - Bondar, V. AU - Beg, M. AU - Bergemann, M. AU - Brockhauser, S. AU - Carinan, C. AU - Costa, R. AU - Dall'Antonia, F. AU - Danilevski, C. AU - Ehsan, W. AU - Esenov, S.G. AU - Fabbri, R. AU - Fangohr, H. AU - Flucke, G. AU - Fulla Marsa, D. AU - Galler, A. AU - Giovanetti, G. AU - Goeries, D. AU - Grünert, J. AU - Hauf, S. AU - Hickin, D.G. AU - Jarosiewicz, T. AU - Kamil, E. AU - Kirienko, Y. AU - Klimovskaia, A. AU - Kluyver, T.A. AU - Mamchyk, D. AU - Michelat, T. AU - Mohacsi, I. AU - Parenti, A. AU - Rück, D.B. AU - Santos, H. AU - Schaffer, R. AU - Silenzi, A. AU - Youngman, C. AU - Zalden, P. AU - Zhu, J. ED - White, Karen S. ED - Brown, Kevin A. ED - Dyer, Philip S. ED - Schaa, Volker RW TI - Beam Position Feedback System Supported by Karabo at European XFEL J2 - Proc. of ICALEPCS2019, New York, NY, USA, 05-11 October 2019 CY - New York, NY, USA T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 17 LA - english AB - The XrayFeed device of Karabo [1, 2] is designed to provide spatial X-ray beam stability in terms of drift compensation utilizing different diagnostic components at the European XFEL (EuXFEL). Our feedback systems proved to be indispensable in cutting-edge pump-probe experiments at EuXFEL. The feedback mechanism is based on a closed loop PID control algorithm  to steer the beam position measured by a so-called diagnostic devices to the desired centered position via defined actuator adjusting the alignment of X-ray optical elements, in our case a flat X-ray mirror system. Several diagnostic devices and actuators can be selected according to the specific experimental area where a beam position feedback is needed. In this contribution, we analyze the improvement of pointing stability of X-rays using different diagnostic devices as an input source for our feedback system. Different types of photon diagnostic devices such as gas-based X-ray monitors , quadrant detectors based on avalanche photo diodes  and optical cameras imaging the X-ray footprint on scintillator screens have been evaluated in our pointing stability studies. PB - JACoW Publishing CP - Geneva, Switzerland SP - 281 EP - 284 KW - controls KW - feedback KW - diagnostics KW - FEL KW - photon DA - 2020/08 PY - 2020 SN - 2226-0358 SN - 978-3-95450-209-7 DO - doi:10.18429/JACoW-ICALEPCS2019-MOPHA040 UR - https://jacow.org/icalepcs2019/papers/mopha040.pdf ER -