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

Eugenio Ferrari, Carlo Spezzani, Franck Fortuna, Renaud Delaunay, Franck Vidal, Ivaylo Nikolov, Paolo Cinquegrana, Bruno Diviacco, David Gauthier, Giuseppe Penco, Primož Rebernik Ribič, Eleonore Roussel, Marco Trovò, Jean-Baptiste Moussy, Tommaso Pincelli, Lounès Lounis, Michele Manfredda, Emanuele Pedersoli, Flavio Capotondi, Cristian Svetina, Nicola Mahne, Marco Zangrando, Lorenzo Raimondi, Alexander Demidovich, Luca Giannessi, Giovanni De Ninno, Miltcho Boyanov Danailov, Enrico Allaria () and Maurizio Sacchi ()
Additional contact information
Eugenio Ferrari: ELETTRA—Sincrotrone Trieste
Carlo Spezzani: ELETTRA—Sincrotrone Trieste
Franck Fortuna: Centre de Sciences Nucléaires et de Sciences de la Matière, Université Paris-Sud, CNRS UMR 8609
Renaud Delaunay: Laboratoire de Chimie Physique Matière et Rayonnement, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7614
Franck Vidal: Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7588
Ivaylo Nikolov: ELETTRA—Sincrotrone Trieste
Paolo Cinquegrana: ELETTRA—Sincrotrone Trieste
Bruno Diviacco: ELETTRA—Sincrotrone Trieste
David Gauthier: ELETTRA—Sincrotrone Trieste
Giuseppe Penco: ELETTRA—Sincrotrone Trieste
Primož Rebernik Ribič: ELETTRA—Sincrotrone Trieste
Eleonore Roussel: ELETTRA—Sincrotrone Trieste
Marco Trovò: ELETTRA—Sincrotrone Trieste
Jean-Baptiste Moussy: Service de Physique de l'Etat Condensé, DSM/IRAMIS/SPEC, CNRS UMR 3680
Tommaso Pincelli: Università degli Studi di Milano
Lounès Lounis: Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7588
Michele Manfredda: ELETTRA—Sincrotrone Trieste
Emanuele Pedersoli: ELETTRA—Sincrotrone Trieste
Flavio Capotondi: ELETTRA—Sincrotrone Trieste
Cristian Svetina: ELETTRA—Sincrotrone Trieste
Nicola Mahne: ELETTRA—Sincrotrone Trieste
Marco Zangrando: ELETTRA—Sincrotrone Trieste
Lorenzo Raimondi: ELETTRA—Sincrotrone Trieste
Alexander Demidovich: ELETTRA—Sincrotrone Trieste
Luca Giannessi: ELETTRA—Sincrotrone Trieste
Giovanni De Ninno: ELETTRA—Sincrotrone Trieste
Miltcho Boyanov Danailov: ELETTRA—Sincrotrone Trieste
Enrico Allaria: ELETTRA—Sincrotrone Trieste
Maurizio Sacchi: Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7588

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract 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.

Date: 2016
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DOI: 10.1038/ncomms10343

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