MOPG30

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URL	https://doi.org/10.18429/JACoW-IPAC2024-MOPG30
Title	Status update of the SASE3 variable polarization project at the European XFEL
Authors	S. Karabekyan, C. Youngman, D. La Civita, F. Preisskorn, F. Wolff-Fabris, G. Geloni, H. Sinn, J. Grünert, J. Laksman, M. Bagha-Shanjani, M. Planas, M. Wuenschel, M. Yakopov, S. Casalbuoni, S. Hauf, S. Abeghyan, S. Serkez, U. Englisch, W. Freund European XFEL GmbH A. Leuschner, A. Block, D. Lenz, D. Lipka, E. Schneidmiller, E. Negodin, F. Brinker, F. Schmidt-Foehre, J. Prenting, L. Froehlich, L. Müller, M. Schloesser, M. Scholz, M. Yurkov, O. Hensler, P. Altmann, R. Mattusch, S. Liu, T. Wamsat, T. Wilksen, T. Ladwig, T. Wohlenberg, W. Decking Deutsches Elektronen-Synchrotron A. Potter, A. Wolski The University of Liverpool C. Kittel, M. Bruegger, T. Schmidt, X. Liang Paul Scherrer Institute D. Kim Pohang Accelerator Laboratory F. Jackson Science and Technology Facilities Council J. Bahrdt Helmholtz-Zentrum Berlin für Materialien und Energie GmbH K. Zhang, L. Huber, M. Calvi, M. Schmidt, R. Ganter, S. Danner, S. Reiche Paul Scherrer Institut
Abstract	The SASE3 Variable Polarization project is intended to offer polarization control of the X-ray FEL pulses at the European XFEL. The project was completed in early 2022. During the winter shutdown 2021-2022, all four APPLE-X helical undulators were placed in the tunnel and first lasing was achieved in April 2022. Unfortunately, further use of the helical afterburner proved impossible, as the encoders used to position the magnetic structures of the undulator were damaged by radiation. To carry out repairs, all undulators were removed from the tunnel in the summer 2022, and investigations were carried out to determine the cause of the radiation damage. This article presents measures taken to minimize further radiation damage in order to ensure the continued operation of the helical afterburner.
Paper	download: MOPG30.pdf
Cite	BibTeX, LaTeX, Text/Word, RIS, EndNote
Conference	15th International Particle Accelerator Conference
Series
Location	Nashville, TN
Date	19-24 May 2024
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Fulvia Pilat - Oak Ridge National Laboratory Wolfram Fischer - Brookhaven National Laboratory Robert Saethre - Oak Ridge National Laboratory Petr Anisimov - Los Alamos National Laboratory Ivan Andrian - Elettra-Sincrotrone Trieste S.C.p.A.
Online ISBN	978-3-95450-247-9
Online ISSN	2673-5490
Received	15 May 2024
Revised	21 May 2024
Accepted	23 May 2024
Issued	01 July 2024
DOI	10.18429/JACoW-IPAC2024-MOPG30
Pages	364-367
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.