Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers
The operation of modern free-electron lasers (FELs) necessitates precise knowledge of electron beam properties at the undulator to ensure the level of control required by increasingly demanding experiments. In seeded FELs, where only electrons interacting with the seed laser contribute to the proces...
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| Format: | Article |
| Language: | English |
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International Union of Crystallography
2025-01-01
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| Series: | Journal of Synchrotron Radiation |
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| Online Access: | https://journals.iucr.org/paper?S1600577524011585 |
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| author | Enrico Allaria Paolo Cinquegrana Miltcho B. Danailov Eugenio Ferrari Fabian Pannek Giuseppe Penco Eleonore Roussel Carlo Spezzani |
| author_facet | Enrico Allaria Paolo Cinquegrana Miltcho B. Danailov Eugenio Ferrari Fabian Pannek Giuseppe Penco Eleonore Roussel Carlo Spezzani |
| author_sort | Enrico Allaria |
| collection | DOAJ |
| description | The operation of modern free-electron lasers (FELs) necessitates precise knowledge of electron beam properties at the undulator to ensure the level of control required by increasingly demanding experiments. In seeded FELs, where only electrons interacting with the seed laser contribute to the process, it is crucial to determine the local values of these properties. We present a novel method, based on accurate modeling of the FEL process in high-gain harmonic generation, to accurately retrieve the electron beam slice energy spread, current and laser-induced energy modulation. Understanding these values is essential for enabling advanced FEL schemes and optimally setting advanced seeding schemes such as echo-enabled harmonic generation. We describe the method and provide an experimental application to the FERMI FEL-1, where a slice energy spread in the range 40–100 keV with a few keV accuracy is measured. |
| format | Article |
| id | doaj-art-e17e0ea4f85e4f48b66e64ad01d5ae54 |
| institution | Kabale University |
| issn | 1600-5775 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | International Union of Crystallography |
| record_format | Article |
| series | Journal of Synchrotron Radiation |
| spelling | doaj-art-e17e0ea4f85e4f48b66e64ad01d5ae542025-01-07T14:26:38ZengInternational Union of CrystallographyJournal of Synchrotron Radiation1600-57752025-01-01321728110.1107/S1600577524011585kam5004Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasersEnrico Allaria0Paolo Cinquegrana1Miltcho B. Danailov2Eugenio Ferrari3Fabian Pannek4Giuseppe Penco5Eleonore Roussel6Carlo Spezzani7Elettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyDeutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, GermanyInstitute for Experimental Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, GermanyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyUniv. Lille, CNRS, UMR 8523 – PhLAM – Physique des Lasers Atomes et Molécules, F-59000 Lille, FranceElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyThe operation of modern free-electron lasers (FELs) necessitates precise knowledge of electron beam properties at the undulator to ensure the level of control required by increasingly demanding experiments. In seeded FELs, where only electrons interacting with the seed laser contribute to the process, it is crucial to determine the local values of these properties. We present a novel method, based on accurate modeling of the FEL process in high-gain harmonic generation, to accurately retrieve the electron beam slice energy spread, current and laser-induced energy modulation. Understanding these values is essential for enabling advanced FEL schemes and optimally setting advanced seeding schemes such as echo-enabled harmonic generation. We describe the method and provide an experimental application to the FERMI FEL-1, where a slice energy spread in the range 40–100 keV with a few keV accuracy is measured.https://journals.iucr.org/paper?S1600577524011585slice parametersenergy spreadseeded felfree-electron lasers |
| spellingShingle | Enrico Allaria Paolo Cinquegrana Miltcho B. Danailov Eugenio Ferrari Fabian Pannek Giuseppe Penco Eleonore Roussel Carlo Spezzani Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers Journal of Synchrotron Radiation slice parameters energy spread seeded fel free-electron lasers |
| title | Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers |
| title_full | Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers |
| title_fullStr | Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers |
| title_full_unstemmed | Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers |
| title_short | Accurate measurements of slice electron beam parameters at the undulator in seeded free-electron lasers |
| title_sort | accurate measurements of slice electron beam parameters at the undulator in seeded free electron lasers |
| topic | slice parameters energy spread seeded fel free-electron lasers |
| url | https://journals.iucr.org/paper?S1600577524011585 |
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