A5000744892- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Ionosphere and magnetosphere dynamics
- Laser-Matter Interactions and Applications
- High-pressure geophysics and materials
- Solar and Space Plasma Dynamics
- Advanced Fiber Laser Technologies
- Nuclear Physics and Applications
- Dust and Plasma Wave Phenomena
- Atomic and Molecular Physics
- Electromagnetic Launch and Propulsion Technology
- Energetic Materials and Combustion
- Plasma Diagnostics and Applications
- Laser Design and Applications
- Particle accelerators and beam dynamics
- Diverse academic and cultural studies
- Distributed and Parallel Computing Systems
- Ocular and Laser Science Research
- Advanced MEMS and NEMS Technologies
- Analytical Chemistry and Sensors
- Laser Material Processing Techniques
- Electrostatic Discharge in Electronics
- Nuclear reactor physics and engineering
Sorbonne Université
2016-2025
École Polytechnique
2016-2025
Centre National de la Recherche Scientifique
2017-2024
Laboratoire pour l'utilisation des lasers intenses
2016-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017-2024
SLAC National Accelerator Laboratory
2019-2023
Menlo School
2019-2022
Université Paris-Saclay
2017-2019
CEA Paris-Saclay
2017-2019
National Institute of Optics
2016-2018
It was suggested [] that an avalanche of electron-positron pairs can be triggered in the laboratory by a standing wave generated intense laser fields. Here, we present general solution to long-standing problem growth rate calculation. We provide simple formula accounts for damping due pair and photon migration from region prolific generation. apply our model variety 3D field configurations including focused beams show (i) particle yield full range intensity able generate predicted, (ii)...
The generation of an autoresonantly phase-locked high-amplitude plasma waves to the chirped beat frequency two driving lasers is studied in dimensions using particle-in-cell simulations. two-dimensional and laser parameters correspond those that optimized wave amplitude one-dimensional Near start autoresonant locking, simulations appear similar results (Luo et al. , Phys. Rev. Res. vol. 6, 2024, p. 013338) with amplitudes above Rosenbluth–Liu limit. Later, just below breaking, simulation...
Perpendicular relativistic ($\gamma_0=10$) shocks in magnetized pair plasmas are investigated using two dimensional Particle-in-Cell simulations. A systematic survey, from unmagnetized to strongly shocks, is presented accurately capturing the transition Weibel-mediated magnetic-reflection-shaped shocks. This found occur for upstream flow magnetizations $10^{-3}<\sigma<10^{-2}$ at which a strong perpendicular net current observed precursor, driving so-called current-filamentation instability....
The Weibel instability driven by two symmetric counter-streaming relativistic electron plasmas, also referred to as current-filamentation instability, is studied in a constant and uniform external magnetic field aligned with the plasma flows. Both linear non stages of are investigated using analytical modeling Particle-In-Cell (PIC) simulations. While previous studies have already described stabilizing effect field, we show here that saturation stage only weakly affected. different...
Autoresonant phase locking of the plasma wakefield to beat frequency two driving lasers offers advantages over conventional acceleration methods, since it requires less demanding laser parameters and is robust variations in target density. Here, we investigate kinetic nonlinear processes that come into play during autoresonant beat-wave electrons, their impact on field amplitude accelerating structure, efficiency. Particle-in-cell simulations show process depends density a nontrivial way but...
We describe a genetic algorithm approach to solve an inverse problem in optics, which determines the characteristics of fiber Bragg grating from its reflected spectrum. The validity proposed method is demonstrated by use sensor for measurement nonlinear strain acting on uniaxial aluminum test specimen.
The Weibel instability from counterstreaming plasma flows is a basic process highly relevant for collisionless shock formation in astrophysics. In this paper we investigate, via two- and three-dimensional simulations, suitable configurations laboratory investigations of the ion (IWI) driven by fast quasineutral flow launched into target radiation pressure an ultra-high-intensity laser pulse (``hole-boring'' process). use S-polarized light at oblique incidence found to be optimal...
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 generation of compact, high-energy ion beams is one the most promising applications intense laser-matter interactions, but control beam spectral quality remains an outstanding challenge. We show that in radiation pressure acceleration a thin solid target onset electron heating determined by growth Rayleigh-Taylor-like instability at front surface and must be controlled to produce with high light sail regime. rate imposes upper limit on laser pulse duration intensity achieve we...
Abstract In many natural phenomena in space (cosmic-rays, fast winds), non-thermal ion populations are produced, with wave-particle interactions self-induced electromagnetic turbulence being suspected to be mediators. However, the processes by which energy is bestowed upon particles debated, and some cases requires field compression. Here we show that laboratory experiments using high-power lasers external strong magnetic can used infer compression interpenetration of two collisionless,...
Weakly magnetized, relativistic collisionless shock waves are not only the natural offsprings of jets in high-energy astrophysical sources, they also associated with some most outstanding displays energy dissipation through particle acceleration and radiation. Perhaps their peculiar exciting feature is that magnetized turbulence sustains process, (possibly) secondary radiation itself, self-excited by accelerated particles themselves, so phenomenology these hinges strongly on microphysics...
Abstract The ability of collisionless shocks to efficiently accelerate nonthermal electrons via diffusive shock acceleration (DSA) is thought require an injection mechanism capable preaccelerating high enough energy where they can start crossing the front potential. We propose, and show fully kinetic plasma simulations, that in high-Mach-number be effectively injected by scattering kinetic-scale magnetic turbulence produced near transition ion Weibel, or current filamentation, instability....
Laser-ablated high-energy-density plasmas offer a promising route to study astrophysically relevant processes underlying collisionless shock formation, magnetic field amplification, and particle acceleration in the laboratory. Using large-scale, multidimensional particle-in-cell simulations, we explore interpenetration of laser-ablated counter-streaming for realistic experimental flow profiles. We find that formation its structure are substantially different from those more idealized...
It was suggested [A. R. Bell & J. G. Kirk, PRL 101, 200403 (2008)] that an avalanche of electron-positron pairs can be triggered in the laboratory by a standing wave generated intense laser fields. Here, we present general solution to long-standing problem growth rate calculation. We provide simple formula accounts for damping due pair and photon migration from region prolific generation. apply our model variety 3D field configurations including focused beams show i) particle yield full...
The forthcoming generation of multi-petawatt lasers opens the way to abundant pair production by nonlinear Breit-Wheeler process, i.e., decay a photon into an electron-positron inside intense laser field. In this paper we explore optimal conditions for in head-on collision pulse with gamma photons. role peak intensity versus focal spot size and shape is examined keeping constant energy match experimental constraints. A simple model soft-shower case, where most pairs originate from initial...
We study the onset of electron heating in intense laser–solid interactions and its impact on spectral quality radiation pressure accelerated ions both hole boring light sail regimes. Two- three-dimensional particle-in-cell (PIC) simulations are performed over a wide range laser target parameters reveal how pulse duration, profile, polarization surface stability control heating, dominant ion acceleration mechanisms spectra. find that strong is associated with growth Rayleigh–Taylor-like...