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Single-shot transverse coherence in seeded and unseeded free-electron lasers: A comparison

Pop, Mihai LU ; Allaria, E.M. ; Curbis, Francesca LU orcid ; Geloni, Gianluca ; Di Mitri, S. ; Foglia, L. ; Grazella, D. ; Gianessi, Luca ; Mahieu, B. and Mahne, N. , et al. (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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organization
publishing date
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}},
}