title: Two-Color Radiation Generated in a Seeded Free-Electron Laser with Two Electron Beams.
abstract: We present the experimental evidence of the generation of coherent and statistically stable two-color free-electron laser radiation obtained by seeding an electron beam double peaked in energy with a laser pulse single spiked in frequency. The radiation presents two neat spectral lines, with time delay, frequency separation, and relative intensity that can be accurately controlled. The analysis of the emitted radiation shows a temporal coherence and a shot-to-shot regularity in frequency significantly enhanced with respect to the self-amplified spontaneous emission.
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Petralia
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: M P
authors.initials: MP
authors.lastname: Anania
authors.affiliation: ENEA Centro Ricerche Bologna, Via Martiri Monte Sole 4, 40129 Bologna, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Artioli
authors.affiliation: INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bacci
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Bellaveglia
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Carpanese
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Chiadroni
authors.affiliation: Università Tor Vergata di Roma, Via della Ricerca Scientifica 1, 00133 Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Cianchi
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Ciocci
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Dattoli
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Di Giovenale
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Di Palma
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: G P
authors.initials: GP
authors.lastname: Di Pirro
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ferrario
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Giannessi
authors.affiliation: Università Tor Vergata di Roma, Via della Ricerca Scientifica 1, 00133 Roma, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Innocenti
authors.affiliation: Università La Sapienza di Roma, Via Antonio Scarpa 24, 00133 Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Mostacci
authors.affiliation: INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy.|Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Petrillo
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Pompili
authors.affiliation: ISM-CNR, Via del Fosso del Cavaliere 100, 00133 Roma, Italy.
authors.forename: J V
authors.initials: JV
authors.lastname: Rau
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Ronsivalle
authors.affiliation: INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy.
authors.forename: A R
authors.initials: AR
authors.lastname: Rossi
authors.affiliation: ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Sabia
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Shpakov
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Vaccarezza
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Villa
mesh_terms: D003116:Color; D003198:Computer Simulation; D004583:Electrons; D007091:Image Processing, Computer-Assisted; D007834:Lasers; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods