Author: Zalden, P.
Paper Title Page
MOPHA040 Beam Position Feedback System Supported by Karabo at European XFEL 281
  • V. Bondar, M. Beg, M. Bergemann, S. Brockhauser, C. Carinan, R. Costa, F. Dall’Antonia, C. Danilevski, W. Ehsan, S.G. Esenov, R. Fabbri, H. Fangohr, G. Flucke, D. Fulla Marsa, A. Galler, G. Giovanetti, D. Goeries, J. Grünert, S. Hauf, D.G. Hickin, T. Jarosiewicz, E. Kamil, Y. Kirienko, A. Klimovskaia, T.A. Kluyver, D. Mamchyk, T. Michelat, I. Mohacsi, A. Parenti, D.B. Rück, H. Santos, R. Schaffer, A. Silenzi, C. Youngman, P. Zalden, J. Zhu
    EuXFEL, Schenefeld, Germany
  • S. Brockhauser
    BRC, Szeged, Hungary
  • H. Fangohr
    University of Southampton, Southampton, United Kingdom
  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 [3] 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 [4], quadrant detectors based on avalanche photo diodes [5] and optical cameras imaging the X-ray footprint on scintillator screens have been evaluated in our pointing stability studies.  
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About • paper received ※ 30 September 2019       paper accepted ※ 08 October 2019       issue date ※ 30 August 2020  
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