Single-shot transverse coherence in seeded and unseeded free-electron lasers: A comparison
(2022) In Physical Review Accelerators and Beams 25(040701).- Abstract
- The advent of x-ray free-electron lasers (FELs) drastically enhanced the capabilities of several analytical techniques, for which the degree of transverse (spatial) coherence of the source is essential. FELs can be operated in self-amplified spontaneous emission (SASE) or seeded configurations, which rely on a qualitatively different initialization of the amplification process leading to light emission. The degree of transverse coherence of SASE and seeded FELs has been characterized in the past, both experimentally and theoretically. However, a direct experimental comparison between the two regimes in similar operating conditions is missing, as well as an accurate study of the sensitivity of transverse coherence to key working parameters.... (More)
- The advent of x-ray free-electron lasers (FELs) drastically enhanced the capabilities of several analytical techniques, for which the degree of transverse (spatial) coherence of the source is essential. FELs can be operated in self-amplified spontaneous emission (SASE) or seeded configurations, which rely on a qualitatively different initialization of the amplification process leading to light emission. The degree of transverse coherence of SASE and seeded FELs has been characterized in the past, both experimentally and theoretically. However, a direct experimental comparison between the two regimes in similar operating conditions is missing, as well as an accurate study of the sensitivity of transverse coherence to key working parameters. In this paper, we carry out such a comparison, focusing in particular on the evolution of coherence during the light amplification process. (Less)
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- author
- organization
- publishing date
- 2022-04-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Accelerators and Beams
- volume
- 25
- issue
- 040701
- article number
- 040701
- publisher
- American Physical Society
- external identifiers
-
- scopus:85128752075
- ISSN
- 2469-9888
- DOI
- 10.1103/PhysRevAccelBeams.25.040701
- language
- English
- LU publication?
- yes
- id
- 781158ca-f2bd-4881-96e5-3ff842458087
- date added to LUP
- 2022-05-02 16:43:37
- date last changed
- 2022-07-05 13:32:10
@article{781158ca-f2bd-4881-96e5-3ff842458087, abstract = {{The advent of x-ray free-electron lasers (FELs) drastically enhanced the capabilities of several analytical techniques, for which the degree of transverse (spatial) coherence of the source is essential. FELs can be operated in self-amplified spontaneous emission (SASE) or seeded configurations, which rely on a qualitatively different initialization of the amplification process leading to light emission. The degree of transverse coherence of SASE and seeded FELs has been characterized in the past, both experimentally and theoretically. However, a direct experimental comparison between the two regimes in similar operating conditions is missing, as well as an accurate study of the sensitivity of transverse coherence to key working parameters. In this paper, we carry out such a comparison, focusing in particular on the evolution of coherence during the light amplification process.}}, author = {{Pop, Mihai and Allaria, E.M. and Curbis, Francesca and Geloni, Gianluca and Di Mitri, S. and Foglia, L. and Grazella, D. and Gianessi, Luca and Mahieu, B. and Mahne, N. and Mirian, N. and Penco, G. and Perosa, G. and Ribic, P.R. and Simoncig, A. and Spampinati, S. and Manfreda, M. and Spezzani, C. and Trovo, M. and Werin, Sverker and Zagrando, M. and De Ninno, Giovanni}}, issn = {{2469-9888}}, language = {{eng}}, month = {{04}}, number = {{040701}}, publisher = {{American Physical Society}}, series = {{Physical Review Accelerators and Beams}}, title = {{Single-shot transverse coherence in seeded and unseeded free-electron lasers: A comparison}}, url = {{http://dx.doi.org/10.1103/PhysRevAccelBeams.25.040701}}, doi = {{10.1103/PhysRevAccelBeams.25.040701}}, volume = {{25}}, year = {{2022}}, }