Superconducting undulator activities at the European X-ray Free-Electron Laser Facility

Casalbuoni, Sara; Abeghyan, Suren; Alanakyan, Levon; Baader, Johann; Barbanotti, Serena; Decking, Winfried; Felice, Massimiliano Di; Eckoldt, Hans-Jörg; Englisch, Uwe; Geloni, Gianluca; Grattoni, Vanessa; Grau, Andreas; Hauberg, Axel; Helwich, Christian; Hobl, Achim; Jensch, Kay; Karabekyan, Suren; Civita, Daniele La; Lederer, Sven; Lechner, Christoph; Lilje, Lutz; Liu, Shan; Marchetti, Barbara; Potter, Andrew; Schnautz, Tobias; Schneidmiller, Evgeny; Sinn, Harald; Walter, Wolfgang; Wichmann, Riko; Wohlenberg, Torsten; Yakopov, Grigory; Yakopov, Mikhail; Zagorodnov, Igor; Zimmermann, René; Ziolkowski, Pawel

doi:10.3389/fphy.2023.1204073

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…As it can be calculated from Ref. [4], a change in gap of 75 µm corresponds to a change in the peak field of 21 mT. • a change of the Hall probe position along the magnetic axis towards the coils of 340 µm.…”

Section: E Half-period Absolute Peak Field and Half K Parameter Measu...mentioning

confidence: 88%

“…The pure iron core winding yokes need in total 34 poles and 33 winding grooves to include the end field compensation. The nominal pole width and height are 3.46 mm and 9.45 mm, respectively [4]. The end field compensation is achieved by installing a different winding package in the final three grooves on each side of the SCU coils.…”

Section: S-presso Mock-upmentioning

confidence: 99%

“…European XFEL foresees the implementation of Superconducting Undulators (SCUs) as part of its facility development program [4]. Five SCU units and a prototype module named S-PRESSO are proposed to be integrated into the existing SASE2 hard X-rays beamline.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Performance Assessment of the S-PRESSO Superconducting Undulator Mock-Up

Baader,

Casalbuoni,

Grattoni

et al. 2024

IEEE Trans. Appl. Supercond.

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Superconducting undulators constitute an important element of the European XFEL facility development program. The application of SCU technology at European XFEL paves the way to potentially enable lasing above 50 keV, opening new frontiers in scientific research and offering unprecedented capabilities in high-energy applications. A total of six modules is foreseen. The Superconducting undulator PRE-SerieS mOdule (S-PRESSO) is the pre-series module for the Free-Electron laser SuperconducTing undulator Afterburner (FESTA). This paper presents a comprehensive assessment of the S-PRESSO superconducting undulator mock-up's magnetic performance conducted at the Institute for Beam Physics and Technology (IBPT) of the Karlsruhe Institute of Technology (KIT). After a description of the experimental setup and the coil, the results of training and of the magnetic field measurements are presented. The results demonstrate a robust design of the mock-up, which achieved the short sample limit, a long lasting stability at nominal current tested for 8 h, and a straight trajectory below European XFEL requirements. The measured quality of the magnetic field is studied and compared to simulations using the geometric values measured at room temperature with a coordinate measuring machine. This analysis suggests areas for potential improvement in the manufacturing process.

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Section: E Half-period Absolute Peak Field and Half K Parameter Measu...mentioning

confidence: 88%

Section: S-presso Mock-upmentioning

confidence: 99%

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Magnetic Performance Assessment of the S-PRESSO Superconducting Undulator Mock-Up

Baader,

Casalbuoni,

Grattoni

et al. 2024

IEEE Trans. Appl. Supercond.

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Beam wakes for canonical chambers with anisotropic surface impedance

Zagorodnov,

Dohlus

2023

Phys. Rev. Accel. Beams

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Novel correction procedure for compensating thermal contraction errors in the measurement of the magnetic field of superconducting undulator coils in a liquid helium cryostat

Marchetti,

Baader,

Casalbuoni

et al. 2024

J Synchrotron Rad

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Superconducting undulators (SCUs) can offer a much higher on-axis undulator field than state-of-the-art cryogenic permanent-magnet undulators with the same period and vacuum gap. The development of shorter-period and high-field SCUs would allow the free-electron laser and synchrotron radiation source community to reduce both the length of undulators and the dimensions of the accelerator. Magnetic measurements are essential for characterizing the magnetic field quality of undulators for operation in a modern light source. Hall probe scanning is so far the most mature technique for local field characterization of undulators. This article focuses on the systematic error caused by thermal contraction that influences Hall probe measurements carried out in a liquid helium cryostat. A novel procedure, based on the redundant measurement of the magnetic field using multiple Hall probes at known relative distance, is introduced for the correction of such systematic error.

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Superconducting undulator activities at the European X-ray Free-Electron Laser Facility

Cited by 4 publications

References 24 publications

Magnetic Performance Assessment of the S-PRESSO Superconducting Undulator Mock-Up

Magnetic Performance Assessment of the S-PRESSO Superconducting Undulator Mock-Up

Beam wakes for canonical chambers with anisotropic surface impedance

Novel correction procedure for compensating thermal contraction errors in the measurement of the magnetic field of superconducting undulator coils in a liquid helium cryostat

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