The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Eugenio Ferrari - One of the best experts on this subject based on the ideXlab platform.
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Chirped pulse amplification in an extreme-ultraviolet Free-Electron Laser
Nature Communications, 2016Co-Authors: David Gauthier, Enrico Allaria, Alexander Demidovich, Simone Di Mitri, Marcello Coreno, Ivan Cudin, Hugo Dacasa, Miltcho Boyanov Danailov, Bruno Diviacco, Eugenio FerrariAbstract:Chirped pulse amplification in optical Lasers is a revolutionary technique, which allows the generation of extremely powerful femtosecond pulses in the infrared and visible spectral ranges. Such pulses are nowadays an indispensable tool for a myriad of applications, both in fundamental and applied research. In recent years, a strong need emerged for light sources producing ultra-short and intense Laser-like X-ray pulses, to be used for experiments in a variety of disciplines, ranging from physics and chemistry to biology and material sciences. This demand was satisfied by the advent of short-wavelength Free-Electron Lasers. However, for any given Free-Electron Laser setup, a limit presently exists in the generation of ultra-short pulses carrying substantial energy. Here we present the experimental implementation of chirped pulse amplification on a seeded Free-Electron Laser in the extreme-ultraviolet, paving the way to the generation of fully coherent sub-femtosecond gigawatt pulses in the water window (2.3-4.4 nm).
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Two-colour generation in a chirped seeded Free-Electron Laser: a close look
Optics Express, 2013Co-Authors: Benoît Mahieu, Enrico Allaria, Davide Castronovo, Miltcho Danailov, Alexander Demidovich, Giovanni De Ninno, Simone Di Mitri, William Fawley, Eugenio Ferrari, Lars FröhlichAbstract:We present the experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass Free-Electron Laser operating in the extreme-ultraviolet spectral range. Our results, collected on the FERMI@Elettra facility and confirmed by numerical simulations, demonstrate the possibility of controlling both the spectral and temporal features of the generated pulses. A Free-Electron Laser operated in this mode becomes a suitable light source for jitter-free, two-colour pump-probe experiments.
Victor Malka - One of the best experts on this subject based on the ideXlab platform.
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A spectral unaveraged algorithm for free electron Laser simulations
Journal of Computational Physics, 2015Co-Authors: I.a. Andriyash, R. Lehe, Victor MalkaAbstract:We propose and discuss a numerical method to model electromagnetic emission from the oscillating relativistic charged particles and its coherent amplification. The developed technique is well suited for free electron Laser simulations, but it may also be useful for a wider range of physical problems involving resonant field–particles interactions. The algorithm integrates the unaveraged coupled equations for the particles and the electromagnetic fields in a discrete spectral domain. Using this algorithm, it is possible to perform full three-dimensional or axisymmetric simulations of short-wavelength amplification. In this paper we describe the method, its implementation, and we present examples of free electron Laser simulations comparing the results with the ones provided by commonly known free electron Laser codes.
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Towards a free electron Laser based on Laser plasma accelerators
Journal of Physics B: Atomic Molecular and Optical Physics, 2014Co-Authors: Marie-emmanuelle Couprie, A. Loulergue, M. Labat, Lehe Remi, Victor MalkaAbstract:The recent advances in developing compact Laser plasma accelerators that deliver high quality electron beams in a more reliable way offer the possibility to consider their use in designing a compact free electron Laser (FEL). Because of the particularity of these beams (especially concerning the divergence and the energy spread), specific electron beam handling is proposed in order to achieve FEL amplification.
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Spectral characterization of fully phase-matched high harmonics generated in a hollow waveguide for Free-Electron Laser seeding
New Journal of Physics, 2013Co-Authors: F Ardana-lamas, Victor Malka, Guillaume Lambert, A Trisorio, B Vodungbo, Philippe Zeitoun, C P HauriAbstract:We present a bright and coherent soft x-ray source based on high harmonic generation delivering up to 1010 photons per second centered at 120 eV within an 80 eV bandwidth. The source profits from fully phase-matched harmonic generation in an unmodulated hollow waveguide. Under these conditions, the resulting high harmonic spectrum is shown to be flat-top up to the cutoff photon energy and in line with the theoretical single-atom response. The source is characterized in view of seeding a Free-Electron Laser and is shown to overcome the Free-Electron Laser noise floor for wavelengths as short as 8.9 nm. This opens the perspective toward direct high harmonic seeding of a Free-Electron Laser at soft x-ray wavelengths.
E. Allaria - One of the best experts on this subject based on the ideXlab platform.
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Two-colour pump–probe experiments with a twin-pulse-seed extreme ultraviolet Free-Electron Laser
Nature Communications, 2013Co-Authors: E. Allaria, F. Bencivenga, R. Borghes, F. Capotondi, D. Castronovo, P. Charalambous, P. Cinquegrana, M. Danailov, G. De Ninno, A. DemidovichAbstract:Exploring the dynamics of matter driven to extreme non-equilibrium states by an intense ultrashort X-ray pulse is becoming reality, thanks to the advent of Free-Electron Laser technology that allows development of different schemes for probing the response at variable time delay with a second pulse. Here we report the generation of two-colour extreme ultraviolet pulses of controlled wavelengths, intensity and timing by seeding of high-gain harmonic generation Free-Electron Laser with multiple independent Laser pulses. The potential of this new scheme is demonstrated by the time evolution of a titanium-grating diffraction pattern, tuning the two coherent pulses to the titanium M-resonance and varying their intensities. This reveals that an intense pulse induces abrupt pattern changes on a time scale shorter than hydrodynamic expansion and ablation. This result exemplifies the essential capabilities of the jitter-free multiple-colour Free-Electron Laser pulse sequences to study evolving states of matter with element sensitivity.
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highly coherent and stable pulses from the fermi seeded free electron Laser in the extreme ultraviolet
Nature Photonics, 2012Co-Authors: E. Allaria, D. Castronovo, Roberto Appio, L Badano, William A Barletta, S Bassanese, S G Biedron, A O Borga, E Busetto, Paolo CinquegranaAbstract:Researchers demonstrate the FERMI Free-Electron Laser operating in the high-gain harmonic generation regime, allowing high stability, transverse and longitudinal coherence and polarization control.
Enrico Allaria - One of the best experts on this subject based on the ideXlab platform.
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Chirped pulse amplification in an extreme-ultraviolet Free-Electron Laser
Nature Communications, 2016Co-Authors: David Gauthier, Enrico Allaria, Alexander Demidovich, Simone Di Mitri, Marcello Coreno, Ivan Cudin, Hugo Dacasa, Miltcho Boyanov Danailov, Bruno Diviacco, Eugenio FerrariAbstract:Chirped pulse amplification in optical Lasers is a revolutionary technique, which allows the generation of extremely powerful femtosecond pulses in the infrared and visible spectral ranges. Such pulses are nowadays an indispensable tool for a myriad of applications, both in fundamental and applied research. In recent years, a strong need emerged for light sources producing ultra-short and intense Laser-like X-ray pulses, to be used for experiments in a variety of disciplines, ranging from physics and chemistry to biology and material sciences. This demand was satisfied by the advent of short-wavelength Free-Electron Lasers. However, for any given Free-Electron Laser setup, a limit presently exists in the generation of ultra-short pulses carrying substantial energy. Here we present the experimental implementation of chirped pulse amplification on a seeded Free-Electron Laser in the extreme-ultraviolet, paving the way to the generation of fully coherent sub-femtosecond gigawatt pulses in the water window (2.3-4.4 nm).
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Two-colour generation in a chirped seeded Free-Electron Laser: a close look
Optics Express, 2013Co-Authors: Benoît Mahieu, Enrico Allaria, Davide Castronovo, Miltcho Danailov, Alexander Demidovich, Giovanni De Ninno, Simone Di Mitri, William Fawley, Eugenio Ferrari, Lars FröhlichAbstract:We present the experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass Free-Electron Laser operating in the extreme-ultraviolet spectral range. Our results, collected on the FERMI@Elettra facility and confirmed by numerical simulations, demonstrate the possibility of controlling both the spectral and temporal features of the generated pulses. A Free-Electron Laser operated in this mode becomes a suitable light source for jitter-free, two-colour pump-probe experiments.
Alexander Demidovich - One of the best experts on this subject based on the ideXlab platform.
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Chirped pulse amplification in an extreme-ultraviolet Free-Electron Laser
Nature Communications, 2016Co-Authors: David Gauthier, Enrico Allaria, Alexander Demidovich, Simone Di Mitri, Marcello Coreno, Ivan Cudin, Hugo Dacasa, Miltcho Boyanov Danailov, Bruno Diviacco, Eugenio FerrariAbstract:Chirped pulse amplification in optical Lasers is a revolutionary technique, which allows the generation of extremely powerful femtosecond pulses in the infrared and visible spectral ranges. Such pulses are nowadays an indispensable tool for a myriad of applications, both in fundamental and applied research. In recent years, a strong need emerged for light sources producing ultra-short and intense Laser-like X-ray pulses, to be used for experiments in a variety of disciplines, ranging from physics and chemistry to biology and material sciences. This demand was satisfied by the advent of short-wavelength Free-Electron Lasers. However, for any given Free-Electron Laser setup, a limit presently exists in the generation of ultra-short pulses carrying substantial energy. Here we present the experimental implementation of chirped pulse amplification on a seeded Free-Electron Laser in the extreme-ultraviolet, paving the way to the generation of fully coherent sub-femtosecond gigawatt pulses in the water window (2.3-4.4 nm).
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Two-colour generation in a chirped seeded Free-Electron Laser: a close look
Optics Express, 2013Co-Authors: Benoît Mahieu, Enrico Allaria, Davide Castronovo, Miltcho Danailov, Alexander Demidovich, Giovanni De Ninno, Simone Di Mitri, William Fawley, Eugenio Ferrari, Lars FröhlichAbstract:We present the experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass Free-Electron Laser operating in the extreme-ultraviolet spectral range. Our results, collected on the FERMI@Elettra facility and confirmed by numerical simulations, demonstrate the possibility of controlling both the spectral and temporal features of the generated pulses. A Free-Electron Laser operated in this mode becomes a suitable light source for jitter-free, two-colour pump-probe experiments.
