Wavelength control in high-gain harmonic generation seeded free-electron lasers

Autor: F. Sottocorona, G. Perosa, E. Allaria, A. Brynes, M. B. Danailov, G. De Ninno, S. Di Mitri, D. Garzella, G. Penco, C. Spezzani, L. Giannessi

Publikováno v: Physical Review Accelerators and Beams, Vol 26, Iss 9, p 090702 (2023)

The basic theory of free-electron lasers (FELs) indicates that the output wavelength of a seeded FEL operated in the high-gain harmonic generation (HGHG) configuration is determined by the wavelength of the seed laser and light is emitted when the un

Externí odkaz: https://doaj.org/article/1244c4850796424bbae0ea458618b0ac

Characterization of soft x-ray echo-enabled harmonic generation free-electron laser pulses in the presence of incoherent electron beam energy modulations

Autor: N. S. Mirian, G. Perosa, E. Hemsing, E. Allaria, L. Badano, P. Cinquegrana, M. B. Danailov, G. De Ninno, L. Giannessi, G. Penco, S. Spampinati, C. Spezzani, E. Roussel, P. R. Ribič, M. Trovó, M. Veronese, S. Di Mitri

Publikováno v: Physical Review Accelerators and Beams, Vol 24, Iss 8, p 080702 (2021)

Echo-enabled harmonic generation free-electron lasers (EEHG FELs) are promising candidates to produce fully coherent soft x-ray pulses by virtue of efficient high-harmonic frequency up-conversion from ultraviolet lasers. The ultimate spectral limit o

Externí odkaz: https://doaj.org/article/39e91867b4d44106bffb583be38b4040

Enhanced seeded free electron laser performance with a 'cold' electron beam

Autor: G. Penco, G. Perosa, E. Allaria, S. Di Mitri, E. Ferrari, L. Giannessi, S. Spampinati, C. Spezzani, M. Veronese

Publikováno v: Physical Review Accelerators and Beams, Vol 23, Iss 12, p 120704 (2020)

FERMI is a seeded free electron laser (FEL) based on the high gain harmonic generation (HGHG) scheme and has been generating intense and fully coherent extreme ultra-violet and soft x-ray pulses for several years. The high-degree performance of the F

Externí odkaz: https://doaj.org/article/8144578e3b36419da0c4768985bd0fa4

Microbunching instability characterization via temporally modulated laser pulses

Autor: A. D. Brynes, I. Akkermans, E. Allaria, L. Badano, S. Brussaard, M. Danailov, A. Demidovich, G. De Ninno, L. Giannessi, N. S. Mirian, G. Penco, G. Perosa, P. Rebernik Ribič, E. Roussel, I. Setija, P. Smorenburg, S. Spampinati, C. Spezzani, M. Trovò, P. H. Williams, A. Wolski, S. Di Mitri

Publikováno v: Physical Review Accelerators and Beams, Vol 23, Iss 10, p 104401 (2020)

High-brightness electron bunches, such as those generated and accelerated in free-electron lasers (FELs), can develop small-scale structure in the longitudinal phase space. This causes variations in the slice energy spread and current profile of the

Externí odkaz: https://doaj.org/article/b55586a648874dcd94d9b25720f59dc6

Characterisation of microbunching instability with 2D Fourier analysis

Autor: G. Perosa, Marco Veronese, L. Badano, Carlo Spezzani, Enrico Allaria, Giulio Gaio, S. Brussaard, D. Gauthier, Najmeh Mirian, Simone Spampinati, Alexander Brynes, S. Di Mitri, I. Akkermans, I. Setija, Peter Williams, Giuseppe Penco, Andrzej Wolski, P. Rebernik, G. De Ninno, M. Trovo, Luca Giannessi

Publikováno v: Scientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
Scientific Reports
Scientific Reports, Nature Publishing Group, 2020, 10 (1), pp.5059. ⟨10.1038/s41598-020-61764-y⟩
Sci.Rep.
Sci.Rep., 2020, 10 (1), pp.5059. ⟨10.1038/s41598-020-61764-y⟩

The optimal performance of high-brightness free-electron lasers (FELs) is limited by the microbunching instability, which can cause variations in both the slice energy spread and longitudinal profile of electron beams. In this paper, we perform 2D Fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e369ad604620a0aff12908af681fbad
http://link.springer.com/article/10.1038/s41598-020-61764-y