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Petralia A, Anania MP, Artioli M, Bacci A, Bellaveglia M, Carpanese M, Chiadroni E, Cianchi A, Ciocci F, Dattoli G, Di Giovenale D, Di Palma E, Di Pirro GP, Ferrario M, Giannessi L, Innocenti L, Mostacci A, Petrillo V, Pompili R, Rau JV, Ronsivalle C, Rossi AR, Sabia E, Shpakov V, Vaccarezza C, Villa F. Two-Color Radiation Generated in a Seeded Free-Electron Laser with Two Electron Beams. Phys Rev Lett 2015; 115:014801. [PMID: 26182099 DOI: 10.1103/physrevlett.115.014801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Indexed: 06/04/2023]
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.
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Affiliation(s)
- A Petralia
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - M P Anania
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - M Artioli
- ENEA Centro Ricerche Bologna, Via Martiri Monte Sole 4, 40129 Bologna, Italy
| | - A Bacci
- INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy
| | - M Bellaveglia
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - M Carpanese
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - E Chiadroni
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - A Cianchi
- Università Tor Vergata di Roma, Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - F Ciocci
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - G Dattoli
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - D Di Giovenale
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - E Di Palma
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - G P Di Pirro
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - M Ferrario
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - L Giannessi
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - L Innocenti
- Università Tor Vergata di Roma, Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - A Mostacci
- Università La Sapienza di Roma, Via Antonio Scarpa 24, 00133 Roma, Italy
| | - V Petrillo
- INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy
- Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy
| | - R Pompili
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - J V Rau
- ISM-CNR, Via del Fosso del Cavaliere 100, 00133 Roma, Italy
| | - C Ronsivalle
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - A R Rossi
- INFN-Sezione di Milano, Via Celoria 16, 20133 Milano, Italy
| | - E Sabia
- ENEA Centro Ricerche Frascati, Via Enrico Fermi 45, IT 00044 Frascati, Roma, Italy
| | - V Shpakov
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - C Vaccarezza
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
| | - F Villa
- INFN Laboratori Nazionali di Frascati, Via Enrico Fermi 44, 00044 Frascati, Roma, Italy
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Ciocci F, Dattoli G, Pagnutti S, Petralia A, Sabia E, Ottaviani PL, Ferrario M, Villa F, Petrillo V. Two color free-electron laser and frequency beating. Phys Rev Lett 2013; 111:264801. [PMID: 24483799 DOI: 10.1103/physrevlett.111.264801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 06/03/2023]
Abstract
We review the theory of two color high gain free-electron laser emission, derive the integral equation characterizing the evolution of the optical intensities, and provide a description of the relevant dynamics. The characteristic feature of this regime is the existence of a mutual bunching, whose origin and role are discussed.
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Affiliation(s)
- F Ciocci
- ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy
| | - G Dattoli
- ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy
| | - S Pagnutti
- ENEA Centro Ricerche Bologna, via Martiri di Monte Sole, 4, IT 40129 Bologna, Italy
| | - A Petralia
- ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy
| | - E Sabia
- ENEA Centro Ricerche Frascati, via E. Fermi, 45, IT 00044 Frascati, Rome, Italy
| | - P L Ottaviani
- INFN Sezione di Bologna, Viale B. Pichat, 6/2, IT 40127 Bologna, Italy
| | - M Ferrario
- INFN Laboratori Nazionali di Frascati, Via E. Fermi IT 00044 Frascati, Rome, Italy
| | - F Villa
- INFN Laboratori Nazionali di Frascati, Via E. Fermi IT 00044 Frascati, Rome, Italy
| | - V Petrillo
- Università degli Studi di Milano, via Celoria 16, IT 20133 Milano, Italy and INFN-Mi, via Celoria 16, IT 20133 Milano, Italy
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Petrillo V, Anania MP, Artioli M, Bacci A, Bellaveglia M, Chiadroni E, Cianchi A, Ciocci F, Dattoli G, Di Giovenale D, Di Pirro G, Ferrario M, Gatti G, Giannessi L, Mostacci A, Musumeci P, Petralia A, Pompili R, Quattromini M, Rau JV, Ronsivalle C, Rossi AR, Sabia E, Vaccarezza C, Villa F. Observation of time-domain modulation of free-electron-laser pulses by multipeaked electron-energy spectrum. Phys Rev Lett 2013; 111:114802. [PMID: 24074094 DOI: 10.1103/physrevlett.111.114802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Indexed: 06/02/2023]
Abstract
We present the experimental demonstration of a new scheme for the generation of ultrashort pulse trains based on free-electron-laser (FEL) emission from a multipeaked electron energy distribution. Two electron beamlets with energy difference larger than the FEL parameter ρ have been generated by illuminating the cathode with two ps-spaced laser pulses, followed by a rotation of the longitudinal phase space by velocity bunching in the linac. The resulting self-amplified spontaneous emission FEL radiation, measured through frequency-resolved optical gating diagnostics, reveals a double-peaked spectrum and a temporally modulated pulse structure.
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Affiliation(s)
- V Petrillo
- INFN-Milano and Università di Milano, Via Celoria, 16 20133 Milano, Italy
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Labat M, Bellaveglia M, Bougeard M, Carré B, Ciocci F, Chiadroni E, Cianchi A, Couprie ME, Cultrera L, Del Franco M, Di Pirro G, Drago A, Ferrario M, Filippetto D, Frassetto F, Gallo A, Garzella D, Gatti G, Giannessi L, Lambert G, Mostacci A, Petralia A, Petrillo V, Poletto L, Quattromini M, Rau JV, Ronsivalle C, Sabia E, Serluca M, Spassovsky I, Surrenti V, Vaccarezza C, Vicario C. High-gain harmonic-generation free-electron laser seeded by harmonics generated in gas. Phys Rev Lett 2011; 107:224801. [PMID: 22182029 DOI: 10.1103/physrevlett.107.224801] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Indexed: 05/31/2023]
Abstract
The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics generated in gas. The third harmonics of a Ti:sapphire laser, generated in a gas cell, has been amplified and up-converted to its second harmonic (λ(rad)=133 nm) in a FEL cascaded configuration based on a variable number of modulators and radiators. We studied the transition between coherent harmonic generation and superradiant regime, optimizing the laser performances with respect to the number of modulators and radiators.
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Affiliation(s)
- M Labat
- ENEA C.R. Frascati, Via E. Fermi, 45 00044 Frascati, Roma, Italy
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Giannessi L, Bacci A, Bellaveglia M, Briquez F, Castellano M, Chiadroni E, Cianchi A, Ciocci F, Couprie ME, Cultrera L, Dattoli G, Filippetto D, Del Franco M, Di Pirro G, Ferrario M, Ficcadenti L, Frassetto F, Gallo A, Gatti G, Labat M, Marcus G, Moreno M, Mostacci A, Pace E, Petralia A, Petrillo V, Poletto L, Quattromini M, Rau JV, Ronsivalle C, Rosenzweig J, Rossi AR, Rossi Albertini V, Sabia E, Serluca M, Spampinati S, Spassovsky I, Spataro B, Surrenti V, Vaccarezza C, Vicario C. Self-amplified spontaneous emission free-electron laser with an energy-chirped electron beam and undulator tapering. Phys Rev Lett 2011; 106:144801. [PMID: 21561195 DOI: 10.1103/physrevlett.106.144801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Indexed: 05/30/2023]
Abstract
We report the first experimental implementation of a method based on simultaneous use of an energy chirp in the electron beam and a tapered undulator, for the generation of ultrashort pulses in a self-amplified spontaneous emission mode free-electron laser (SASE FEL). The experiment, performed at the SPARC FEL test facility, demonstrates the possibility of compensating the nominally detrimental effect of the chirp by a proper taper of the undulator gaps. An increase of more than 1 order of magnitude in the pulse energy is observed in comparison to the untapered case, accompanied by FEL spectra where the typical SASE spiking is suppressed.
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Affiliation(s)
- L Giannessi
- ENEA C.R. Frascati, Via E. Fermi,45 00044 Frascati (RM), Italy.
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Rose WD, Ciocci F. Sudden death from anomalous coronary artery in an 11-year-old child. Am J Emerg Med 2001; 19:526-7. [PMID: 11593480 DOI: 10.1053/ajem.2001.27145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Ciocci F, Dattoli G, Giannessi L, Torre A, Voykov G. Analytic and numerical study of two-frequency undulator radiation. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1993; 47:2061-2066. [PMID: 9960226 DOI: 10.1103/physreve.47.2061] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ciocci F, Bartolini R, Doria A, Gallerano GP, Giovenale E, Kimmitt MF, Messina G, Renieri A. Operation of a compact free-electron laser in the millimeter-wave region with a bunched electron beam. Phys Rev Lett 1993; 70:928-931. [PMID: 10054240 DOI: 10.1103/physrevlett.70.928] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ciocci F, Dattoli G, Mari C, Torre A. Measuring the Wigner rotation with electron beams. Phys Rev A 1992; 46:5149-5153. [PMID: 9908735 DOI: 10.1103/physreva.46.5149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ciocci F, Doria A, Gallerano GP, Giabbai I, Kimmitt MF, Messina G, Renieri A, Walsh JE. Observation of coherent millimeter and submillimeter emission from a microtron-driven Cherenkov free-electron laser. Phys Rev Lett 1991; 66:699-702. [PMID: 10043878 DOI: 10.1103/physrevlett.66.699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ciocci F, Dattoli G, Doria A, Gallerano GP, Schettini G, Torre A. Spontaneous emission in a double dielectric slab for C. Phys Rev A Gen Phys 1987; 36:207-210. [PMID: 9898672 DOI: 10.1103/physreva.36.207] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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