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Title Beam Position Feedback System Supported by Karabo at European XFEL
  • V. Bondar, M. Beg, M. Bergemann, S. Brockhauser, C. Carinan, R. Costa, F. Dall’Antonia, C. Danilevski, W. Ehsanpresenter, 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
Abstract 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.
Paper download MOPHA040.PDF [1.238 MB / 4 pages]
Poster download MOPHA040_POSTER.PDF [0.963 MB]
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Conference ICALEPCS2019
Series International Conference on Accelerator and Large Experimental Physics Control Systems (17th)
Location New York, NY, USA
Date 05-11 October 2019
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Karen S. White (ORNL, Oak Ridge, TN, USA); Kevin A. Brown (BNL, Upton, NY, USA); Philip S. Dyer (BNL, Upton, NY, USA); Volker RW Schaa (GSI, Darmstadt, Germany)
Online ISBN 978-3-95450-209-7
Online ISSN 2226-0358
Received 30 September 2019
Accepted 08 October 2019
Issue Date 30 August 2020
DOI doi:10.18429/JACoW-ICALEPCS2019-MOPHA040
Pages 281-284
Creative Commons CC logoPublished by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.