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6 results on '"L. Giannessi"'

1. An approach for realizing four-wave-mixing experiments stimulated by two-color extreme ultraviolet pulses

Author

Laura Foglia, Giuseppe Penco, R. Cucini, G. De Ninno, L. Giannessi, S. Di Mitri, Primož Rebernik Ribič, Ivaylo Nikolov, Emiliano Principi, Flavio Capotondi, Emanuele Pedersoli, Giulio Gaio, Marco Zangrando, Michele Manfredda, Claudio Masciovecchio, R. Mincigrucci, M. Trovo, Paolo Cinquegrana, Nicola Mahne, A. Simoncig, M. B. Danailov, C. Svetina, Filippo Bencivenga, Alessandro Gessini, Lorenzo Raimondi, and A. Calvi

Subjects
Physics, Free electron model, business.industry, Extreme ultraviolet lithography, Nonlinear optics, Laser, Signal, law.invention, Wavelength, Four-wave mixing, Optics, law, Extreme ultraviolet, business
Abstract

The advent of extreme ultraviolet (EUV) and soft x-ray free electron lasers (FELs) has enabled nonlinear optical experiments at wavelengths shorter than the visible-UV range. An important class of experiments is those based on the four-wave-mixing (FWM) approach, which are often based on interactions between pulses at different wavelengths. The exploitation of multiple EUV/soft x-ray wavelengths is not straightforward, but it can significantly expand the range of applications. In this manuscript we report on an experimental approach, based on the concomitant use of a non-collinear split-delay-and-recombination unit (“mini-Timer”) and on a two-color seeded FEL emission scheme (“twin-seed mode”). We used a diamond sample for demonstrating the capability of this setup of generating and detecting a FWM signal stimulated by two-color EUV FEL pulses. This approach can be further exploited for developing experimental methods based on non-linear EUV/x-ray optics.

Published
2021
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2. Synchrotron radiation from magnetic undulators as a prospective diagnostic tool

Author

R. Barbini, F. Ciocci, A. Torre, G. Dattoli, and L. Giannessi

Subjects
Physics, Brightness, business.industry, Synchrotron radiation, Undulator, Radiation, Optics, Nuclear magnetic resonance, Distortion, Physics::Accelerator Physics, Laser beam quality, Beam emittance, business, Beam (structure)
Abstract

The brightness of the radiation emitted by an ultrarelativistic e-beam passing through a magnetic undulator is sensitive to the beam quality (namely, energy spread and emittances) and to the undulator characteristics (i.e., possible random errors both in intensity and direction of magnetization, etc.). We analyse the spectrum distortion induced by the above effects and discuss the possibility of using the undulator radiation as a diagnostic tool. Finally, we also study the importance of near-field effects when the radiation is detected unfocussed off-axis and how they can combine with the effects induced by the beam emittances to produce a larger on-axis inhomogeneous broadening.

Published
2005
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3. Calculation of Coherent Radiation from Ultra-short Electron Beams Using a Liénard-Wiechert Based Simulation Code

Author

L. Giannessi, M. Quattromini, A. Flacco, James Rosenzweig, S. Reiche, and Michael Fairchild

Subjects
Electromagnetic field, Physics, business.industry, Detector, Synchrotron radiation, Particle accelerator, Radiation, law.invention, Optics, law, Frequency domain, Physics::Accelerator Physics, business, Beam (structure), Coherence (physics)
Abstract

The coherent radiation emitted by electrons in high brightness beam‐based experiments is important from the viewpoints of both radiation source development, and the understanding and diagnosing the basic physical processes important in beam manipulations at high intensity. While much theoretical work has been developed to aid in calculating aspects of this class of radiation, these methods do not often produce accurate information concerning the experimentally relevant aspects of the radiation. At UCLA, we are particularly interested in coherent synchrotron radiation and the related phenomena of coherent edge radiation, in the context of a fs‐beam chicane compression experiment at the BNL ATF. To analyze this and related problems, we have developed a program that acts as an extension to the Lienard‐Wiechert‐based 3D simulation code TREDI, termed FieldEye. This program allows the evaluation of electromagnetic fields in the time and frequency domain in an arbitrary 2D detector planar area. We discuss here t...

Published
2004
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4. Highly coherent and stable pulses from the FERMI seeded free-electron laser in the extreme ultraviolet

Author

M. Predonzani, A. Fabris, R. Fabris, D. Zangrando, E. Karantzoulis, C. Serpico, M. Giannini, Daniele Cocco, Carlo Spezzani, Enrico Allaria, L. Rumiz, Paolo Delgiusto, Gerardo D'Auria, Marco Lonza, William M. Fawley, Paolo Sigalotti, Massimo Milloch, S. Bassanese, Federico Gelmetti, F. Rossi, Ivaylo Nikolov, S. Tazzari, Eugenio Ferrari, Alexander Demidovich, Marco Veronese, E. Busetto, Salvatore Noe, Stefano Cleva, C. Svetina, L. Badano, Sandra Biedron, R. De Monte, G. De Ninno, Stephen V. Milton, A. Vascotto, M. Dal Forno, S. Di Mitri, M. Trovo, M. Petronio, Paolo Cinquegrana, Alberto Lutman, Benoît Mahieu, R. Umer, William A. Barletta, M. Musardo, C. Scafuri, L. Froehlich, Miltcho B. Danailov, Ivan Cudin, D. Castronovo, Luca Giannessi, Marco Zangrando, Paolo Craievich, Giuseppe Penco, A. Salom, A. O. Borga, L. Pivetta, Mario Ferianis, P. Furlan, Simone Spampinati, R. Gobessi, Roberto Visintini, S. Ferry, R. Ivanov, M. Svandrlik, Fulvio Parmigiani, B. Diviacco, Roberto Appio, M. Zaccaria, Max Cornacchia, Giulio Gaio, E., Allaria, R., Appio, L., Badano, W. A., Barletta, S., Bassanese, S. G., Biedron, A., Borga, E., Busetto, D., Castronovo, P., Cinquegrana, S., Cleva, D., Cocco, M., Cornacchia, P., Craievich, I., Cudin, G., D'Auria, DAL FORNO, Massimo, M. B., Danailov, R., De Monte, G., De Ninno, P., Delgiusto, A., Demidovich, S., Di Mitri, B., Diviacco, A., Fabri, R., Fabri, W., Fawley, M., Feriani, Ferrari, Eugenio, S., Ferry, L., Froehlich, P., Furlan, G., Gaio, F., Gelmetti, L., Giannessi, M., Giannini, R., Gobessi, R., Ivanov, E., Karantzouli, M., Lonza, A., Lutman, B., Mahieu, M., Milloch, S. V., Milton, M., Musardo, I., Nikolov, Noe', Salvatore, Parmigiani, Fulvio, G., Penco, M., Petronio, L., Pivetta, M., Predonzani, F., Rossi, L., Rumiz, A., Salom, C., Scafuri, C., Serpico, P., Sigalotti, S., Spampinati, C., Spezzani, M., Svandrlik, C., Svetina, S., Tazzari, M., Trovo, R., Umer, A., Vascotto, M., Veronese, R., Visintini, M., Zaccaria, D., Zangrando, and M., Zangrando

Subjects
FEL, Physics, business.industry, Lasers, Free-electron laser, Polarization (waves), Laser, Free Electron Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Transverse plane, Optics, LEDs and light sources Ultrafast photonics X-rays, law, Extreme ultraviolet, Physics::Accelerator Physics, High harmonic generation, Atomic physics, business, Coherence (physics), Fermi Gamma-ray Space Telescope
Abstract

Free-electron lasers (FELs) are promising devices for generating light with laser-like properties in the extreme ultraviolet and X-ray spectral regions. Recently, FELs based on the self-amplified spontaneous emission (SASE) mechanism have allowed major breakthroughs in diffraction and spectroscopy applications, despite the relatively large shot-to-shot intensity and photon-energy fluctuations and the limited longitudinal coherence inherent in the SASE mechanism. Here, we report results on the initial performance of the FERMI seeded FEL, based on the high-gain harmonic generation configuration, in which an external laser is used to initiate the emission process. Emission from the FERMI FEL-1 source occurs in the form of pulses carrying energy of several tens of microjoules per pulse and tunable throughout the 65 to 20 nm wavelength range, with unprecedented shot-to-shot wavelength stability, low-intensity fluctuations, close to transform-limited bandwidth, transverse and longitudinal coherence and full control of polarization.

Published
2012
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5. Status of the SPARC project

Author

S. Pagnutti, P. Emma, M. Preger, D. Alesini, C. De Martinis, Rodolfo Bonifacio, P.L. Ottaviani, James Rosenzweig, Luigi Palumbo, M. Quattromini, F. Tazzioli, R. Boni, Alessandro Cianchi, Adolfo Esposito, Simone Cialdi, Gian Piero Gallerano, V. Fusco, Pascal Salières, F. Sgamma, Massimo Ferrario, O. Tcherbakoff, L. Cultrera, R. Ricci, Andrea Doria, Ilario Boscolo, M. G. Castellano, Alessio Perrone, Dario Giove, Carlo Ligi, Luca Ficcadenti, G. Parisi, Alberto Clozza, Sven Reiche, P. Monchicourt, Pierre Breger, Angelo Stella, C. Schaerf, Daniele Pelliccia, Luca Giannessi, M. Sassi, A. Dipace, Vittoria Petrillo, M.E. Couprie, M. Bougeard, Marie Labat, G. Ronci, Andrea Mostacci, Alberto Renieri, A. Ghigo, Luigi Pellegrino, Guillaume Lambert, F. Ciocci, G. Di Pirro, Daniele Filippetto, Giuseppe Dattoli, L. Catani, Concetta Ronsivalle, Emilio Giovenale, C. Maroli, Enrica Chiadroni, Bruno Spataro, Hamed Merdji, Alessandro Flacco, Carlo Vicario, Luigi Picardi, G. Gatti, Amalia Torre, Francesco Flora, Mario Serio, Manuela Boscolo, Cristina Vaccarezza, Bertrand Carré, D. Garzella, E. Gabrielli, Alberto Bacci, Andrea Rossi, P. Musumeci, Elio Sabia, F. Broggi, Massimo Petrarca, A. Drago, Marco Bellaveglia, G. Messina, C. Sanelli, M. Rosetti, Fabrizio Castelli, E. Pace, F. Alessandria, Claudio Pellegrini, Alessandro Gallo, Luca Serafini, A. Zucchini, Mario Mattioli, S. Bertolucci, M. Vescovi, Mauro Migliorati, Agostino Marinelli, D., Alesini, S., Bertolucci, M. E., Biagini, C., Biscari, R., Boni, M., Boscolo, M., Castellano, A., Clozza, G., DI PIRRO, A., Drago, A., Esposito, M., Ferrario, V., Fusco, A., Gallo, A., Ghigo, S., Guiducci, M., Incurvati, C., Ligi, F., Marcellini, M., Migliorati, C., Milardi, A., Mostacci, L., Palumbo, L., Pellegrino, M., Preger, P., Raimondi, R., Ricci, C., Sanelli, M., Serio, F., Sgamma, B., Spataro, A., Stecchi, A., Stella, F., Tazzioli, C., Vaccarezza, M., Vescovi, C., Vicario, M., Zobov, F., Alessandria, A., Bacci, I., Boscolo, F., Broggi, S., Cialdi, C., Demartini, D., Giove, C., Maroli, M., Mauri, V., Petrillo, M., Rom, L., Serafini, Levi, Decio, M., Mattioli, G., Medici, L., Catani, E., Chiadroni, S., Tazzari, R., Bartolini, F., Ciocci, G., Dattoli, A., Doria, F., Flora, G. P., Gallerano, L., Giannessi, E., Giovenale, G., Messina, L., Mezi, P. L., Ottaviani, S., Pagnutti, L., Picardi, M., Quattromini, A., Renieri, C., Ronsivalle, A., Cianchi, A. D., Angelo, R., DI SALVO, A., Fantini, D., Moricciani, C., Schaerf, and J. B., Rosenzweig

Subjects
Physics, Nuclear and High Energy Physics, Brightness, SASE-FEL, high brightness electron beam, business.industry, Particle accelerator, Modular design, Undulator, Linear particle accelerator, Settore FIS/04 - Fisica Nucleare e Subnucleare, law.invention, non-linear resonant higher harmonics, Optics, photo-injector, law, Spark (mathematics), Radio frequency, Beam emittance, Aerospace engineering, business, Instrumentation
Abstract

SPARC-X is a two branch project consisting in the SPARC test facility dedicated to the development and test of critical subsystems such as high brightness photoinjector and a modular expandable undulator for SASE-FEL experiments at 500 nm with seeding, and the SPARK facility aiming at generation of high brilliance coherent radiation in the 1.5-13 nm range, based on the achieved expertise. The projects are supported by MIUR (Research Department of Italian Government) and Regione Lazio. SPARC has completed the commissioning phase of the photoinjector in November 2006. The achieved experimental results are here summarized together with the status of the second phase commissioning plans. The SPARK project is based on the generation of ultra high peak brightness electron beams at the energy of 1 and 2 GeV generating radiation in the 1.5-13 nm range. The construction is at the moment planned in two steps starting with a 1 GeV Linac. The project layout including both RF-compression and magnetic chicane techniques has been studied.

Published
2004
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6. Two-stage seeded soft-X-ray free-electron laser

Author

Enrico Allaria, Paolo Sigalotti, C. Scafuri, Miltcho B. Danailov, Luca Giannessi, M. Svandrlik, S. Di Mitri, Gerardo D'Auria, Alexander Demidovich, Mario Ferianis, D. Castronovo, Marco Zangrando, Benoît Mahieu, Carlo Spezzani, L. Froehlich, David Gauthier, Paolo Cinquegrana, Fulvio Parmigiani, Giulio Gaio, W. M. Fawley, R. Ivanov, Simone Spampinati, Bruno Diviacco, G. De Ninno, Nicola Mahne, Giuseppe Penco, M. Trovo, C. Serpico, D. Zangrando, Paolo Craievich, Eugenio Ferrari, Marco Veronese, M. Dal Forno, Lorenzo Raimondi, Cristian Svetina, Ivaylo Nikolov, E., Allaria, D., Castronovo, P., Cinquegrana, P., Craievich, DAL FORNO, Massimo, M. B., Danailov, G., D'Auria, A., Demidovich, G., De Ninno, S., Di Mitri, B., Diviacco, W. M., Fawley, M., Feriani, Ferrari, Eugenio, L., Froehlich, G., Gaio, D., Gauthier, L., Giannessi, R., Ivanov, B., Mahieu, N., Mahne, I., Nikolov, Parmigiani, Fulvio, G., Penco, L., Raimondi, C., Scafuri, C., Serpico, P., Sigalotti, S., Spampinati, C., Spezzani, M., Svandrlik, C., Svetina, M., Trovo, M., Veronese, D., Zangrando, and M., Zangrando

Subjects
FEL, Soft x ray, Materials science, Two stage FEL, business.industry, XFEL, Free-electron laser, Physics::Optics, Laser, Seeded FEL, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Wavelength, Optics, law, Femtosecond, Harmonic, Optoelectronics, Physics::Accelerator Physics, Seeding, business, Jitter
Abstract

We report the first generation of coherent, tunable, variable-polarization, soft X-ray femtosecond pulses, generated by a seeded free-electron laser (FEL) operating in the fresh bunch, two-stage harmonic upshift configuration. Characterization of the radiation proves this FEL configuration can produce single-transverse-mode, narrow-spectral-bandwidth output pulses of several tens of microjoules energy and low pulse-to-pulse wavelength jitter at final wavelengths of 10.8 nm and below. The fresh bunch configuration enhances the FEL emission at high harmonic orders by avoiding a gain depression due to the energy spread induced by the first-stage FEL interaction. Coherent signals measured down to 4.3 nm suggest this configuration is directly scalable to photon energies that will enable scientific investigations below the carbon K-edge, including access to the L-edges of many magnetic materials, with an energy per pulse unlocking the gate for experiments in the soft X-ray region with close to Fourier-transform-limited pulses. © 2013 Macmillan Publishers Limited. All rights reserved.

Published
2013
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