Enhancing hard X-ray beamline performance at SwissFEL through spontaneous radiation measurements
The hard X-ray beamline (Aramis) of the Swiss free-electron laser (SwissFEL) has been in user operation since the end of 2017 and its performance has been continuously monitored and enhanced over the past eight years. From the beginning, spontaneous radiation has been utilized to monitor the behavior of its 13 individual undulator modules: the pointing direction of the electron beam in each module, their alignment relative to the electron beam, and the calibration of their magnetic field strength (K calibration). This article introduces the methods employed at the Aramis beamline to optimize performance using spontaneous radiation, traces the evolution of these improvements, and highlights the recently achieved record performance.
Authors
- D. Voulot
- S. Reiche (ORCID: https://orcid.org/0000-0002-7797-6736)
- Ariana Cassar
- Eduard Prat (ORCID: https://orcid.org/0000-0002-7065-7417)
- Christopher Arrell (ORCID: https://orcid.org/0000-0003-2932-196X)
- Nicholas Sammut (ORCID: https://orcid.org/0000-0001-7679-604X)
- Tobias Weilbach (ORCID: https://orcid.org/0000-0001-9125-3393)
- Thomas Schietinger (ORCID: https://orcid.org/0000-0002-2701-538X)
- Nicole Hiller (ORCID: https://orcid.org/0009-0003-0184-6577)
- M. Aiba (ORCID: https://orcid.org/0000-0001-8638-6917)
- Marco Calvi (ORCID: https://orcid.org/0000-0002-2502-942X)
- Christoph Kittel (ORCID: https://orcid.org/0000-0001-5527-1009)
- Eugenio Ferrari (ORCID: https://orcid.org/0000-0002-1082-5984)
Institutions
- University of Malta (MT)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Paul Scherrer Institute (CH)
Publication Details
- Journal
- Journal of Synchrotron Radiation
- Published
- 2025-11-26
- DOI
- https://doi.org/10.1107/s1600577525010227
- Primary Topic
- Particle Accelerators and Free-Electron Lasers
- Type
- article
- Field-Weighted Citation Impact
- 0.00