M. Vescovi
A5088256956- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Laser-Matter Interactions and Applications
- Ion-surface interactions and analysis
- High-pressure geophysics and materials
- Advanced Surface Polishing Techniques
- Particle physics theoretical and experimental studies
- Electron and X-Ray Spectroscopy Techniques
- Muon and positron interactions and applications
- Atomic and Molecular Physics
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Laser Design and Applications
- Astro and Planetary Science
- Diamond and Carbon-based Materials Research
- Dark Matter and Cosmic Phenomena
Helmholtz-Zentrum Dresden-Rossendorf
2023-2024
TU Dresden
2023
Pontificia Universidad Católica de Chile
2016-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
1985-2011
Istituto Nazionale di Fisica Nucleare
1981-2007
Abstract Laser-driven ion accelerators can deliver high-energy, high-peak current beams and are thus attracting attention as a compact alternative to conventional accelerators. However, achieving sufficiently high energy levels suitable for applications such radiation therapy remains challenge laser-driven Here we generate proton with spectrally separated high-energy component of up 150 MeV by irradiating solid-density plastic foil targets ultrashort laser pulses from repetitive petawatt...
SPARC (acronym of ``Sorgente Pulsata ed Amplificata di Radiazione Coerente'', i.e. Pulsed and Amplified Source Coherent Radiation) is a single pass free-electron laser designed to obtain high gain amplification at radiation wavelength 500 nm. Self-amplified spontaneous emission has been observed driving the amplifier with high-brightness beam linac. We report measurements energy, spectra, exponential gain. Experimental results are compared simulations from several numerical codes.
In this Letter we report the first experimental observation of double emittance minimum effect in beam dynamics high-brightness electron generation by photoinjectors; effect, as predicted theory, is crucial achieving photoinjectors aiming at producing beams for short wavelength single-pass free lasers. The experiment described was performed SPARC photoinjector site, during stage commissioning project. made possible a newly conceived device, called an meter, which allows detailed and...
For high-intensity laser-solid interactions, the absolute density and surface gradients of target at arrival ultrarelativistic laser peak are critical parameters. Accurate modeling leading edge-driven preexpansion is desired to strengthen predictive power associated computer simulations. The transition from an initial solid state a plasma state, i.e., breakdown solid, defines starting point subsequent preexpansion. In this work, we report on time-resolved observation transient laser-induced...
The new generation of linac injectors driving free electron lasers in the self-amplified stimulated emission (SASE-FEL) regime requires high brightness beams to generate radiation wavelength range from UV x rays. choice injector working point and its matching structure are key factors meet this requirement. An emittance compensation scheme presently applied several photoinjectors worldwide is known as "Ferrario" point. In spite great importance there was, so far, no direct measurement beam...
<title>Abstract</title> Laser-driven ion accelerators can deliver high-energy, high peak current beams from relativistic laser plasmas formed in solid-density materials [1, 2]. This innovative concept attracts a lot of attention for various multidisciplinary applications as compact alternative to conventional [3]. However, achieving energy levels suitable such radiation therapy remains challenge laser-driven accelerators. Here, we report on experimental generation plasma-accelerated proton...
Talbot-Lau x-ray interferometers can map electron density gradients in High Energy Density (HED) samples. In the deflectometer configuration, it provide refraction, attenuation, elemental composition, and scatter information from a single image. X-ray backlighters deflectometry must meet specific requirements regarding source size spectra, amongst others, to accurately diagnose wide range of HED experiments. 8 keV sources produced high-power laser pulsed power environment were evaluated as...
We present the status of project PLASMONX, recently approved by INFN. This project, based on a collaboration between INFN and CNR-IPCF, aims at long term upgrade SPARC system with goal to develop LNF an integrated facility for advanced beam-laser-plasma research in field acceleration techniques ultra-bright X-ray radiation sources related applications. The its first phase, foresees development High Intensity Laser Laboratory (HILL) whose main component is 100 TW-class Ti: Sa laser...
SPARC and SPARX are two different initiatives toward an Italian F ree E lectron L aser ( FEL ) source operating in the S elf A mplified pontaneous mission SASE mode, which several national research institutions involved. is a high gain project devoted to provide of visible VUV radiation while exploiting mechanism. An advanced Photo-Injector system, emittance compensating RF-gun plus 150 MeV Linac, will inject quality e-beam into undulator generate brilliance region at fundamental wavelength,...
Talbot-Lau x-ray interferometry has been implemented to map electron density gradients in High Energy Density Physics (HEDP) experiments. X-ray backlighter targets have evaluated for Deflectometry (TXD). Cu foils, wires, and sphere irradiated by 10–150 J, 8–30 ps laser pulses, while two pulsed-power generators (∼350 kA, 350 ns ∼200 150 ns) driven wire, hybrid, laser-cut x-pinches. A plasma ablation front generated the Omega EP was imaged first time through TXD densities &gt;1023 cm−3....
Abstract Laser–plasma accelerated (LPA) proton bunches are now applied for research fields ranging from ultra-high-dose-rate radiobiology to material science. Yet, the capabilities characterize spectrally and angularly broad LPA lag behind rapidly evolving applications. The OCTOPOD translates resolved spectral characterization of into spatially detection volumetric dose distribution deposited in a liquid scintillator. Up 24 multi-pinhole arrays record projections scintillation light allow...
Talbot-Lau X-ray deflectometry (TXD) has been developed as an electron density diagnostic for High Energy Density (HED) plasmas. The technique can deliver x-ray refraction, attenuation, elemental composition, and scatter information from a single Moiré image. An 8 keV interferometer was deployed using laser x-pinch backlighters. Grating survival mapping were demonstrated 25–29 J, 8–30 ps pulses copper foil targets. pattern formation grating also observed driven at 400 kA, ∼1 kA/ns. These...
DA/spl Phi/NE, the Frascati LNF /spl Phi/-factory, is providing luminosity for KLOE experiment since July 2000. A steady increase of daily integrated in has been obtained, due to interspersed machine physics studies. The main results are: single bunch by reduction effects nonlinear terms machine, background reduction, refill colliding beams while keeping detector taking data and stable stored current. fraction time used tune reduce DEAR configuration. delivered was sufficient conclude first...
A series of experimental measurements fast ions generated in a tungsten conical wire array are presented. The detected using set negatively biased Faraday cups located on axis above the at distances between 10 and 67 cm. Significant differences signals from probes found varying background atmospheric pressure 10−2 10−5 Torr. At Torr, pulse moving 106 m/s is collected by cups. In contrast, intermediate (10−4 Torr) high (10−2 pressures, both electrons with velocity order m/s. ascribed to...
A Talbot–Lau x-ray deflectometer can map electron density gradients in high energy plasmas, as well provide information about plasma elemental composition through single-image refraction and attenuation measurements. new adaptation to a pulsed power environment used backlighting from copper X-pinches, allowing for mapping of low-Z object. Even though the X-pinch backlighter is not properly optimized emitting x-rays terms source size photon fluence, Moire fringe patterns with contrast up 14%...
Abstract In laser-ion acceleration experiments, the interaction of rising flank a high power laser pulse with target can cause pre-ionization and subsequent pre-expansion long before arrival main peak. Exact knowledge this is required in order to understand laser-plasma mechanisms help numerical simulations.&#xD;For dielectric targets, starting point characterized by time at which undergoes laser-induced breakdown (LIB). work, we present method determine LIB sub-micron-thick Formvar...
The SPARC project foresees the realization of a high brightness photo-injector to produce 150-200 MeV electron beam drive SASE-FEL in visible light. As first stage commissioning complete characterization photoinjector has been accomplished with detailed study emittance compensation process downstream gun-solenoid system novel diagnostic device, called meter. In this paper we report results obtained so far including experimental observation double minimum effect on which is based optimised...
The Project SPARC (Sorgente Pulsata e Amplificata di Radiazione Coerente), proposed by a collaboration among ENEA-INFN-CNR-Universitadi Roma Tor Vergata- INFM-ST, was recently funded the Italian Government. aim of project is to promote an R&D activity oriented development coherent ultra-brilliant X-ray source in Italy (SPARX proposal (1)). identified program based on two main issues: generation ultra-high peak brightness electron beams and experimental study SASE-FEL process with resonant...