http://www.cnr.it/ontology/cnr/individuo/prodotto/ID200878

Tunability experiments at the FERMI@Elettra free-electron laser (Articolo in rivista)

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Tunability experiments at the FERMI@Elettra free-electron laser (Articolo in rivista) (literal)

Anno

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E Allaria, A Battistoni, F Bencivenga, R Borghes, C Callegari, F Capotondi, D Castronovo, P Cinquegrana, D Cocco, M Coreno, P Craievich, R Cucini, F D'Amico, M B Danailov, A Demidovich, G De Ninno, A Di Cicco, S Di Fonzo, M Di Fraia, S Di Mitri, B Diviacco, W M Fawley, E Ferrari, A Filipponi, L Froehlich, A Gessini, E Giangrisostomi, L Giannessi, D Giuressi, C Grazioli, R Gunnella, R Ivanov, B Mahieu, N Mahne, C Masciovecchio, I P Nikolov, G Passos, E Pedersoli, G Penco, E Principi, L Raimondi, R Sergo, P Sigalotti, C Spezzani, C Svetina, M Trovò and M Zangrando (2012)
Tunability experiments at the FERMI@Elettra free-electron laser
in New journal of physics
(literal)

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E Allaria, A Battistoni, F Bencivenga, R Borghes, C Callegari, F Capotondi, D Castronovo, P Cinquegrana, D Cocco, M Coreno, P Craievich, R Cucini, F D'Amico, M B Danailov, A Demidovich, G De Ninno, A Di Cicco, S Di Fonzo, M Di Fraia, S Di Mitri, B Diviacco, W M Fawley, E Ferrari, A Filipponi, L Froehlich, A Gessini, E Giangrisostomi, L Giannessi, D Giuressi, C Grazioli, R Gunnella, R Ivanov, B Mahieu, N Mahne, C Masciovecchio, I P Nikolov, G Passos, E Pedersoli, G Penco, E Principi, L Raimondi, R Sergo, P Sigalotti, C Spezzani, C Svetina, M Trovò and M Zangrando (literal)

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[E Allaria, A Battistoni, F Bencivenga, R Borghes, F Capotondi, D Castronovo, P Cinquegrana, D Cocco, P Craievich, R Cucini, F D'Amico, M B Danailov, A Demidovich, S Di Fonzo, S Di Mitri, B Diviacco, W M Fawley, E Ferrari, L Froehlich, A Gessini, E Giangrisostomi, L Giannessi, D Giuressi, C Grazioli, R Gunnella, R Ivanov, N Mahne, C Masciovecchio, I P Nikolov, G Passos, E Pedersoli, G Penco, E Principi, L Raimondi, R Sergo, P Sigalotti, C Spezzani, C Svetina, M Trovò] Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [C Callegari, M.Coreno] CNR-IMIP, Monterotondo Scalo, Italy and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [G De Ninno] Laboratory of Quantum Optics, University of Nova Gorica, Nova Gorica, Slovenia and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [A Di Cicco] Università di Camerino, Camerino, Italy; [M Di Fraia] Università di Trieste, Trieste, Italy and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [A Filipponi] Università degli studi dell'Aquila, L'Aquila, Italy; [L Giannessi] ENEA C. R. Frascati, Frascati, Italy and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [B Mahieu] CEA Saclay, DSM/IRAMIS/SPAM, Gif-sur-Yvette, France and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy; [M Zangrando] CNR-IOM, Trieste, Italy and Elettra-Sincrotrone Trieste SCpA, Trieste, Italy (literal)

Titolo

Abstract

FERMI@Elettra is a free electron-laser (FEL)-based user facility that, after two years of commissioning, started preliminary users' dedicated runs in 2011. At variance with other FEL user facilities, FERMI@Elettra has been designed to deliver improved spectral stability and longitudinal coherence. The adopted scheme, which uses an external laser to initiate the FEL process, has been demonstrated to be capable of generating FEL pulses close to the Fourier transform limit. We report on the first instance of FEL wavelength tuning, both in a narrow and in a large spectral range (fine- and coarse-tuning). We also report on two different experiments that have been performed exploiting such FEL tuning. We used fine-tuning to scan across the 1s-4p resonance in He atoms, at ?23.74 eV (52.2 nm), detecting both UV-visible fluorescence (4p-2s, 400 nm) and EUV fluorescence (4p-1s, 52.2 nm). We used coarse-tuning to scan the M4,5 absorption edge of Ge (~29.5 eV) in the wavelength region 30-60 nm, measured in transmission geometry with a thermopile positioned on the rear side of a Ge thin foil. (literal)

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