Eugenio Ferrari
A5070415715- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray Imaging Techniques
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Advanced Electron Microscopy Techniques and Applications
- Gyrotron and Vacuum Electronics Research
- Magnetic properties of thin films
- Advancements in Photolithography Techniques
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Atomic and Molecular Physics
- Advanced Surface Polishing Techniques
- Advanced Chemical Physics Studies
- Semiconductor Quantum Structures and Devices
- Crystallography and Radiation Phenomena
- Superconducting Materials and Applications
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Measurement and Metrology Techniques
- Electron and X-Ray Spectroscopy Techniques
- Magnetic confinement fusion research
- Photonic and Optical Devices
- Laser Material Processing Techniques
Deutsches Elektronen-Synchrotron DESY
2022-2024
Paul Scherrer Institute
2017-2023
Elettra-Sincrotrone Trieste S.C.p.A.
2011-2019
École Polytechnique Fédérale de Lausanne
2017-2019
University of Trieste
2010-2017
AREA Science Park
2012
Consejo Superior de Investigaciones Científicas
1993
Universidad Complutense de Madrid
1993
Unidades Centrales Científico-Técnicas
1993
University of Rochester
1966
Exploring the dynamics of matter driven to extreme non-equilibrium states by an intense ultrashort X-ray pulse is becoming reality, thanks advent free-electron laser technology that allows development different schemes for probing response at variable time delay with a second pulse. Here we report generation two-colour ultraviolet pulses controlled wavelengths, intensity and timing seeding high-gain harmonic multiple independent pulses. The potential this new scheme demonstrated evolution...
FERMI is a seeded free-electron laser (FEL) facility located at the Elettra laboratory in Trieste, Italy, and now user operation with its first FEL line, FEL-1, covering wavelength range between 100 20 nm. The second FEL-2, high-gain harmonic generation double-stage cascade 20-4 nm, has also completed commissioning call been recently opened. An overview of typical operating modes presented.
The FERMI facility in Trieste, Italy, is ideal for generating and measuring light characterized by tunable polarization states the vacuum ultraviolet spectral range. New results reveal a high degree of (>0.9) over 26--55 nanometers.
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 facilities, has been designed to deliver improved spectral stability and longitudinal coherence. The adopted scheme, which uses an external laser initiate the process, demonstrated be capable generating pulses close Fourier transform limit. We report on first instance wavelength tuning, both narrow large range...
Abstract The advent of free-electron laser (FEL) sources delivering two synchronized pulses different wavelengths (or colours) has made available a whole range novel pump–probe experiments. This communication describes major step forward using new configuration the FERMI FEL-seeded source to deliver with wavelengths, each tunable independently over broad spectral adjustable time delay. FEL scheme makes use seed beams and split radiator section generate extreme ultraviolet from distinct...
We demonstrate the ability to control and shape spectrotemporal content of extreme-ultraviolet (XUV) pulses produced by a seeded free-electron laser (FEL). The over properties XUV light was achieved precisely manipulating linear frequency chirp seed laser. Our results agree with existing theory, which allows us retrieve temporal (amplitude phase) FEL pulse from measurements spectra as function operating parameters. Furthermore, we show first direct evidence full coherence generate Fourier...
FERMI is a novel class of free-electron laser that capable producing femtosecond pulses ultraviolet and x-ray light, essential to studying ultrafast processes in matter. A new investigation characterizes FERMI's pulse shape confirms it routinely generates Gaussian lasting few tens femtoseconds.
The SwissFEL soft X-ray free-electron laser (FEL) beamline Athos will be ready for user operation in 2021. Its design includes a novel layout of alternating magnetic chicanes and short undulator segments. Together with the APPLE X architecture undulators, branch can operated different modes producing FEL beams unique characteristics ranging from attosecond pulse length to high-power modes. Further space has been reserved upgrades including modulators an external seeding better timing...
X-ray free-electron lasers (FELs) are state-of-the-art scientific tools capable to study matter on the scale of atomic processes. Since initial operation FELs more than a decade ago, several facilities with upgraded performance have been put in operation. Here we present first lasing results Athos, soft FEL beamline SwissFEL at Paul Scherrer Institute Switzerland. Athos features an undulator layout based short APPLE-X modules providing full polarisation control, interleaved small magnetic...
Abstract Intense ultrashort X-ray pulses produced by modern free-electron lasers (FELs) allow one to probe biological systems, inorganic materials and molecular reaction dynamics with nanoscale spatial femtoscale temporal resolution. These experiments require the knowledge, possibly control, of spectro-temporal content individual pulses. FELs relying on seeding have potential produce spatially temporally fully coherent Here we propose implement an interferometric method, which allows us...
Laser-heater systems are essential tools to control and optimize high-gain free-electron lasers (FELs) working in the x-ray wavelength range. Indeed, these induce a controllable increase of energy spread electron bunch. The heating suppresses longitudinal microbunching instability which otherwise would limit FEL performance. Here, we demonstrate that, through action instability, long-wavelength modulation beam induced by laser heater at low can persist until entrance into undulators. This...
FERMI is the first user facility based upon an externally seeded free-electron laser (FEL) and was designed to deliver high quality, transversely longitudinally coherent radiation pulses in extreme ultraviolet soft x-ray spectral regimes. The linear accelerator includes a heater control longitudinal microbunching instability, which otherwise expected degrade quality of brightness electron beam sufficiently reduce FEL output intensity brightness. In this paper, we present results...
In a coherent control experiment, light pulses are used to guide the real-time evolution of quantum system. This requires coherence and pulses' electric-field carrier waves. this work, we use frequency-domain interferometry demonstrate mutual time-delayed generated by an extreme ultraviolet seeded free-electron laser. Furthermore, driving seed laser lock precisely relative phase between two pulses. new capability opens way multitude experiments, which will take advantage high intensity,...
Abstract Polarization control is a key feature of light generated by short-wavelength free-electron lasers. In this work, we report the first experimental characterization polarization properties an extreme ultraviolet high gain laser operated with crossed polarized undulators. We investigate average degree and shot-to-shot stability analyze aspects such as existing possibilities for controlling switching state emitted light. The results are in agreement predictions based on Gaussian beams...
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 extreme-ultraviolet spectral range. Our results, collected on FERMI@Elettra facility confirmed numerical simulations, demonstrate possibility controlling both temporal features generated pulses. A operated this mode becomes suitable light source jitter-free, two-colour pump-probe experiments.
Abstract Chirped pulse amplification in optical lasers is a revolutionary technique, which allows the generation of extremely powerful femtosecond pulses infrared and visible spectral ranges. Such are nowadays an indispensable tool for myriad applications, both fundamental applied research. In recent years, strong need emerged light sources producing ultra-short intense laser-like X-ray pulses, to be used experiments variety disciplines, ranging from physics chemistry biology material...
Abstract Short wavelength free-electron lasers (FELs), providing pulses of ultrahigh photon intensity, have revolutionized spectroscopy on ionic targets. Their exceptional flux enables multiple absorptions within a single femtosecond pulse, which in turn allows for deep insights into the photoionization process itself as well evolving states target. Here we employ ultraintense from FEL FERMI to spectroscopically investigate sequential emission electrons gaseous, atomic argon neutral ground...
This work describes a method for the generation of one and two-color ultra-short X-ray free-electron-laser pulses, based on tailoring Coulomb interaction between electrons highly compressed beam in nonlinear regime.