Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering

Ferrari, E.; Spezzani, C.; Fortuna, F.; Delaunay, R.; Vidal, F.; Nikolov, I.; Cinquegrana, P.; Diviacco, B.; Gauthier, D.; Penco, G.; Ribič, P.R.; Roussel, E.; Trovò, M.; Moussy, J.; Pincelli, T.; Lounis, L.; Manfredda, M.; Pedersoli, E.; Capotondi, F.; Svetina, C.; Mahne, N.; Zangrando, M.; Raimondi, L.; Demidovich, A.; Giannessi, L.; De Ninno, G.; Danailov, M.B.; Allaria, E.; Sacchi, M.

doi:10.1038/ncomms10343

The advent of free-electron laser (FEL) sources delivering two synchronized pulses of different wavelengths (or colours) has made available a whole range of novel pump–probe experiments. This communication describes a major step forward using a new configuration of the FERMI FEL-seeded source to deliver two pulses with different wavelengths, each tunable independently over a broad spectral range with adjustable time delay. The FEL scheme makes use of two seed laser beams of different wavelengths and of a split radiator section to generate two extreme ultraviolet pulses from distinct portions of the same electron bunch. The tunability range of this new two-colour source meets the requirements of double-resonant FEL pump/FEL probe time-resolved studies. We demonstrate its performance in a proof-of-principle magnetic scattering experiment in Fe–Ni compounds, by tuning the FEL wavelengths to the Fe and Ni 3p resonances.

Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering / E. Ferrari, C. Spezzani, F. Fortuna, R. Delaunay, F. Vidal, I. Nikolov, P. Cinquegrana, B. Diviacco, D. Gauthier, G. Penco, P.R. Ribič, E. Roussel, M. Trovò, J. Moussy, T. Pincelli, L. Lounis, M. Manfredda, E. Pedersoli, F. Capotondi, C. Svetina, N. Mahne, M. Zangrando, L. Raimondi, A. Demidovich, L. Giannessi, G. De Ninno, M.B. Danailov, E. Allaria, M. Sacchi. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 7(2016 Jan 13).

Titolo:	Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering
Autori:	E. Ferrari C. Spezzani F. Fortuna R. Delaunay F. Vidal I. Nikolov P. Cinquegrana B. Diviacco D. Gauthier G. Penco P. R. Ribič E. Roussel M. Trovò J. Moussy PINCELLI, TOMMASO L. Lounis M. Manfredda E. Pedersoli F. Capotondi C. Svetina N. Mahne M. Zangrando L. Raimondi A. Demidovich L. Giannessi G. De Ninno M. B. Danailov E. Allaria M. Sacchi mostra contributor esterni nascondi contributor esterni
Settore Scientifico Disciplinare:	Settore FIS/03 - Fisica della Materia
Data di pubblicazione:	13-gen-2016
Rivista:	NATURE COMMUNICATIONS
Tipologia:	Article (author)
Digital Object Identifier (DOI):	http://dx.doi.org/10.1038/ncomms10343
Appare nelle tipologie:	01 - Articolo su periodico

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