A5037756705- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- High-pressure geophysics and materials
- Magnetic confinement fusion research
- Atomic and Molecular Physics
- Solar and Space Plasma Dynamics
- Laser Design and Applications
- Topic Modeling
- Gamma-ray bursts and supernovae
- Ion-surface interactions and analysis
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Laser Material Processing Techniques
- Particle Accelerators and Free-Electron Lasers
- Energy Harvesting in Wireless Networks
- Plasma Diagnostics and Applications
- Advanced Electron Microscopy Techniques and Applications
- Electromagnetic Compatibility and Measurements
- Dust and Plasma Wave Phenomena
- Fluid Dynamics Simulations and Interactions
- Advancements in Photolithography Techniques
- Space Satellite Systems and Control
- Advanced Surface Polishing Techniques
- Environmental Monitoring and Data Management
Sorbonne Université
2013-2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013-2020
École Polytechnique
2013-2020
Centre National de la Recherche Scientifique
2013-2020
Université Paris Sciences et Lettres
2017-2020
Université Paris Cité
2017-2020
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2017-2020
Observatoire de Paris
2017-2020
Laboratoire pour l'utilisation des lasers intenses
2017-2020
Sorbonne Paris Cité
2017-2019
The interaction of laser pulses with thin grating targets, having a periodic groove at the irradiated surface, is experimentally investigated. Ultrahigh contrast ($\ensuremath{\sim}{10}^{12}$) allow us to demonstrate an enhanced laser-target coupling for first time in relativistic regime ultrahigh intensity $>{10}^{19}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$. A maximum increase by factor 2.5 cutoff energy protons produced target normal sheath acceleration observed respect plane around...
We investigate by particle-in-cell simulations in two and three dimensions the laser-plasma interaction proton acceleration multilayer targets where a low density "near-critical" layer of few micron thickness is added on illuminated side thin, high layer. This target design can be obtained depositing "foam" thin metallic foil. The presence near-critical plasma strongly increases both conversion efficiency energy electrons leads to enhanced from rear via Target Normal Sheath Acceleration...
The acceleration of dense targets driven by the radiation pressure high-intensity lasers leads to a Rayleigh-Taylor instability (RTI) with rippling interaction surface. Using simple model it is shown that self-consistent modulation caused sinusoidal affects substantially wave vector spectrum RTI, depending on laser polarization. plasmonic enhancement local field when period close wavelength sets dominant RTI scale. nonlinear evolution investigated three-dimensional simulations, which show...
We report on the development of foam-based double-layer targets (DLTs) for laser-driven ion acceleration. Foam layers with a density few mg cm−3 and controlled thickness in 8–36 μm range were grown μm-thick Al foils by pulsed laser deposition (PLD). The DLTs experimentally investigated varying pulse intensity, polarisation target properties. Comparing simple foils, we observed systematic enhancement maximum average energies number accelerated ions. Maximum up to 30 MeV protons 130 C6+ ions...
The acceleration of ions from ultrathin (10--100 nm) carbon foils has been investigated using intense ($\ensuremath{\sim}6\ifmmode\times\else\texttimes\fi{}1{0}^{20}\text{ }\mathrm{W}\text{ }{\mathrm{cm}}^{\ensuremath{-}2}$) ultrashort (45 fs) laser pulses, highlighting a strong dependence the ion beam parameters on polarization, with circularly polarized (CP) pulses producing highest energies for both protons and carbons ($25\ensuremath{-}30\text{ }\text{ }\mathrm{MeV}/\mathrm{nucleon}$);...
The generation of energetic electron bunches by the interaction a short, ultraintense ($I>{10}^{19}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$) laser pulse with ``grating'' targets has been investigated in regime ultrahigh pulse-to-prepulse contrast (${10}^{12}$). For incidence angles close to resonant condition for surface plasmon excitation, strong emission was observed within narrow cone along target surface, energy spectra peaking at 5--8 MeV and total charge...
In this paper, we present acceleration by laser and dynamics of charged particles (ALaDyn), a particle-in-cell code, to investigate the interaction pulse with preformed plasma and/or an externally injected beam. The fully parallelized, works in 1D, 2D, 3D Cartesian geometry, it is based on compact high-order finite-difference schemes ensuring higher spectral accuracy. We discuss features, performances, validation tests code. finally preliminary application physically relevant case PLASMON-X...
The development of novel target concepts is crucial to make laser-driven acceleration ion beams suitable for applications. We tested double-layer targets formed an ultralow density nanostructured carbon layer ($\ensuremath{\sim}7\text{ }\text{ }{\mathrm{mg}/\mathrm{cm}}^{3}$, $8--12\text{ }\ensuremath{\mu}\mathrm{m}$--thick) deposited on a $\ensuremath{\mu}\mathrm{m}$--thick solid Al foil. A systematic increase in the total number accelerated ions (protons and ${\mathrm{C}}^{6+}$) as well...
The experimental feasibility of the laser-driven ion acceleration concept with multi-layered, foam-based targets has been investigated. Targets required features have produced and characterized, exploiting potential pulsed laser deposition technique. In intensity range 1016–1017 W cm−2, they allow us to obtain maximum proton energies 2–3 times higher compared bare solid targets, able reach surpass MeV both low ultrahigh contrast pulses. results two-dimensional particle-in-cell simulations,...
Fast electrons produced by a 10 ps, 160 J laser pulse through laser-compressed plastic cylinders are studied experimentally and numerically in the context of fast ignition. K(α)-emission images reveal collimated or scattered electron beam depending on initial density compression timing. A numerical transport model shows that implosion-driven electrical resistivity gradients induce strong magnetic fields able to guide electrons. The good agreement with measured sizes provides first...
Abstract Solar radio emissions are electromagnetic waves emitted in the solar wind as a consequence of electron beams accelerated during flares or interplanetary shocks such coronal mass ejections. Different physical mechanisms have been suggested to describe their origin. A good understanding emission process would enable infer kinetic energy transferred from electrons waves. Even if electrostatic case has extensively studied, full simulations were attempted only recently. In this work, we...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation L. Volpe, D. Batani, B. Vauzour, Ph. Nicolai, J. Santos, C. Regan, A. Morace, F. Dorchies, Fourment, S. Hulin, Perez, Baton, K. Lancaster, M. Galimberti, R. Heathcote, Tolley, Ch. Spindloe, P. Koester, Labate, Gizzi, Benedetti, Sgattoni, Richetta, Pasley, Beg, Chawla, Higginson, G. MacPhee; Proton radiography...
A theoretical model of the Target Normal Sheath Acceleration (TNSA) process, able to go beyond limits available descriptions, is developed. It allows achieve a more satisfactory interpretation TNSA. The theory, also supported by two dimensional particle-in-cell simulations, elucidates role played main laser and target parameters. Comparison between predictions experimental data related thickness dependence maximum ion energy discussed, showing agreement. can be used as simple but effective...
Proton acceleration from the interaction of high contrast, 25 fs laser pulses at >1019 W/cm2 intensity with plastic foils covered a single layer regularly packed micro-spheres has been investigated experimentally. The proton cut-off energy measured as function micro-sphere size and incidence angle for different substrate thickness, both P S polarization. presence comparable to wavelength allows increase polarizations small angles (10∘). For large incidence, however, enhancement...
A short overview of laser–plasma acceleration ions is presented. The focus on some recent experimental results and the related theoretical work advanced regimes. These latter include in particular target normal sheath using ultrashort low-energy pulses structured targets, radiation pressure both thick ultrathin targets collisionless shock moderate density plasmas. For each approach, open issues need potential for further developments are briefly discussed.
The excitation of surface plasmons with ultra-intense (I ∼ 5 × 1019 W/cm2), high contrast (∼1012) laser pulses on periodically modulated solid targets has been recently demonstrated to produce collimated bunches energetic electrons along the target [Fedeli et al., Phys. Rev. Lett. 116, 015001 (2016)]. Here, we report an extensive experimental and numerical study aimed a complete characterization acceleration mechanism, demonstrating its robustness promising characteristics for electron...
Experimental and theoretical results of relativistic electron transport in cylindrically compressed matter are presented. This experiment, which is a part the HiPER roadmap, was achieved on VULCAN laser facility (UK) using four long pulses beams (∼4 × 50 J, 1 ns, at 0.53 µm) to compress hollow plastic cylinder filled with foam three different densities (0.1, 0.3 g cm−3). 2D simulations predict density 2–5 cm−3 plasma temperature up 100 eV maximum compression. A short pulse (10 ps, 160 J)...
Structured targets offer great control over ultra-intense laser-plasma interaction, allowing the optimization of laser-target coupling for specific applications. By means particle-in-cell simulations we investigated three applications in particular: high-order harmonic generation (HHG) with grating targets, enhanced target multilayer and intense laser-driven terahertz (THz) pulses structured targets. The irradiation a solid at resonance angle surface plasmon excitation enhances HHG respect...
We present a Vlasov, i.e. kinetic Eulerian simulation study of nonlinear collisionless ion-acoustic shocks and solitons excited by an intense laser interacting with overdense plasma. The use the Vlasov code avoids problems low particle statistics allows validation particle-in-cell results. A simple, original correction to splitting method for numerical integration equation has been implemented in order ensure charge conservation relativistic regime. show that ion distribution is affected...
The dynamics of radiation pressure acceleration in the relativistic light sail regime are analysed by means large scale, three-dimensional (3D) particle-in-cell simulations. Differently to other mechanisms, 3D leads faster and higher energy gain than 1D or 2D geometry. This effect is caused local decrease target density due transverse expansion leading a "lighter sail". However, rarefaction an earlier transition transparency limiting gain. A instability structured inhomogeneous ion distribution.
The emission of high-order harmonics in the extreme ultraviolet range from interaction a short, intense laser pulse with grating target is investigated experimentally. When resonantly exciting surface plasmon, both intensity and highest order observed for harmonic along increase respect to flat target. Harmonics are obtained when suitable density gradient preformed at surface, demonstrating possibility manipulate profile on nanometric scale without preventing plasmon excitation. In support...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation B. Vauzour, F. Pérez, L. Volpe, K. Lancaster, Ph. Nicolaï, D. Batani, S. Baton, N. Beg, C. Benedetti, E. Brambrink, Chawla, Dorchies, Fourment, M. Galimberti, A. Gizzi, R. Heathcote, P. Higginson, Hulin, Jafer, Köster, Labate, J. MacKinnon, G. MacPhee, W. Nazarov, Pasley, Regan, X. Ribeyre, Richetta, Schurtz,...
We present 'jasmine', an implementation of a fully relativistic, 3D, electromagnetic Particle-In-Cell (PIC) code, capable running simulations in various laser plasma acceleration regimes on Graphics-Processing-Units (GPUs) HPC clusters. Standard energy/charge preserving FDTD-based algorithms have been implemented using double precision and quadratic (or arbitrary sized) shape functions for the particle weighting. When porting PIC scheme to GPU architecture (or, general, shared memory...
The interaction of low intensity laser pulses with metal nano-structures is at the basis plasmonics and excitation surface plasmon polaritons (SP) one its building blocks. Some configurations adopted in classical can be explored considering high lasers interacting properly structured targets. SP intensities such that electrons quiver relativistic velocities, poses new questions might open frontiers for manipulation amplification power pulses. Here we discuss two which show evidence resonant...