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Comparison of wavefront sensing and ablation imprinting for FEL focus diagnostics at FLASH2
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SYSNO ASEP 0587353 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Comparison of wavefront sensing and ablation imprinting for FEL focus diagnostics at FLASH2 Author(s) Keitel, B. (DE)
Chalupský, Jaromír (FZU-D) RID, ORCID
Jelínek, Šimon (FZU-D) ORCID
Burian, Tomáš (FZU-D) RID, ORCID
Dziarzhytski, S. (DE)
Hájková, Věra (FZU-D) RID, ORCID
Juha, Libor (FZU-D) RID, ORCID, SAI
Kuglerová, Zuzana (FZU-D) ORCID
Kuhlmann, M. (DE)
Mann, K. (DE)
Ruiz-Lopez, M. (DE)
Schaefer, B. (DE)
Vozda, Vojtěch (FZU-D) ORCID
Wodzinski, T. (PT)
Yurkov, M. V. (DE)
Plönjes, E. (DE)Number of authors 16 Source Title Optics Express. - : Optical Society of America - ISSN 1094-4087
Roč. 32, č. 12 (2024), s. 21532-21552Number of pages 21 s. Language eng - English Country US - United States Keywords ablation imprinting ; FEL focus diagnostics ; FLASH2 ; Hartmann wavefront sensor Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GA20-08452S GA ČR - Czech Science Foundation (CSF) LM2023068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001249174500005 EID SCOPUS 85195627793 DOI https://doi.org/10.1364/OE.527418 Annotation Extreme ultraviolet (EUV) photon beam characterization techniques, Hartmann wavefront sensing and single shot ablation imprinting, were compared along the caustic of a tightly focused free-electron laser (FEL) beam at beamline FL24 of FLASH2, the Free-electron LASer in Hamburg at DESY. The transverse coherence of the EUV FEL was determined by a Young’s double pinhole experiment and used in a back-propagation algorithm which includes partial coherence to calculate the beam intensity profiles along the caustic from the wavefront measurements. A very good agreement of the profile structure and size is observed for different wavelengths between the back-propagated profiles, an indirect technique, and ablation imprints. As a result, the Hartmann wavefront sensor including its software MrBeam is a very usefull, single shot pulse resolved and fast tool for non-invasive determination of focal spot size and shape and also for beam profiles along the caustic. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2025 Electronic address https://hdl.handle.net/11104/0360253
Number of the records: 1