The Experts below are selected from a list of 141162 Experts worldwide ranked by ideXlab platform
Simon Labrunie - One of the best experts on this subject based on the ideXlab platform.
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On the harmonic Boltzmannian waves in laser-Plasma Interaction
Journal of Physics A: Mathematical and General, 2006Co-Authors: Mihai Bostan, Simon LabrunieAbstract:We study the permanent regimes of the reduced Vlasov-Maxwell system for laser-Plasma Interaction. A non-relativistic and two different relativistic models are investigated. We prove the existence of solutions where the distribution function is Boltzmannian and the electromagnetic variables are time-harmonic and circularly polarized.
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GLOBAL SOLUTIONS FOR THE ONE-DIMENSIONAL VLASOV-MAXWELL SYSTEM FOR LASER-Plasma Interaction
Mathematical Models and Methods in Applied Sciences, 2006Co-Authors: José Carrillo, Simon LabrunieAbstract:We analyse a reduced 1D Vlasov--Maxwell system introduced recently in the physical literature for studying laser-Plasma Interaction. This system can be seen as a standard Vlasov equation in which the field is split in two terms: an electrostatic field obtained from Poisson's equation and a vector potential term satisfying a nonlinear wave equation. Both nonlinearities in the Poisson and wave equations are due to the coupling with the Vlasov equation through the charge density. We show global existence of weak solutions in the non-relativistic case, and global existence of characteristic solutions in the quasi-relativistic case. Moreover, these solutions are uniquely characterised as fixed points of a certain operator. We also find a global energy functional for the system allowing us to obtain $L^p$-nonlinear stability of some particular equilibria in the periodic setting.
Nicolas Crouseilles - One of the best experts on this subject based on the ideXlab platform.
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Convergence of a semi-Lagrangian scheme for the reduced Vlasov–Maxwell system for laser–Plasma Interaction
Numerische Mathematik, 2009Co-Authors: Mihai Bostan, Nicolas CrouseillesAbstract:The subject matter of this paper concerns the numerical approximation of reduced Vlasov–Maxwell models by semi-Lagrangian schemes. Such reduced systems have been introduced recently in the literature for studying the laser–Plasma Interaction. We recall the main existence and uniqueness results on these topics, we present the semi-Lagrangian scheme and finally we establish the convergence of this scheme.
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Convergence of a semi-Lagrangian scheme for the reduced Vlasov-Maxwell system for laser-Plasma Interaction
Numerische Mathematik, 2009Co-Authors: Mihai Bostan, Nicolas CrouseillesAbstract:The subject matter of this paper concerns the numerical approximation of reduced Vlasov-Maxwell models by semi-Lagrangian schemes. Such reduced systems have been introduced recently in the literature for studying the laser-Plasma Interaction. We recall the main existence and uniqueness results on these topics, we present the semi-Lagrangian scheme and finally we establish the convergence of this scheme
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Vlasov laser-Plasma Interaction simulations with a moving grid
2007Co-Authors: Nicolas Crouseilles, Alain Ghizzo, Stéphanie SalmonAbstract:The present work focuses on the numerical resolution of a reduced $1$D Vlasov-Maxwell system introduced recently in the physical literature for studying laser-Plasma Interaction. This system can be seen as a standard Vlasov equation in which the force term is split into two terms: the classical electrostatic field obtained from the Poisson's equation and a magnetic term evolving through Maxwell's type equations. A semi-Lagrangian code is used to study the Interaction of ultrashort electromagnetic pulse with Plasma; however during the major part of the simulation, many of the grid points are wasted. We then introduce a dynamic mesh which allows us to consider the part of the phase space where the distribution function is not zero.
M Passoni - One of the best experts on this subject based on the ideXlab platform.
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ion acceleration by superintense laser Plasma Interaction
Reviews of Modern Physics, 2013Co-Authors: A Macchi, M Borghesi, M PassoniAbstract:Ion acceleration driven by superintense laser pulses is attracting an impressive and steadily increasing effort. Motivations can be found in the potential for a number of foreseen applications and in the perspective to investigate novel regimes as far as available laser intensities will be increasing. Experiments have demonstrated in a wide range of laser and target parameters the generation of multi-MeV proton and ion beams with unique properties such as ultrashort duration, high brilliance and low emittance. In this paper we give an overview of the state-of-the art of ion acceleration by laser pulses as well as an outlook on its future development and perspectives. We describe the main features observed in the experiments, the observed scaling with laser and Plasma parameters and the main models used both to interpret experimental data and to suggest new research directions.
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ion acceleration by superintense laser Plasma Interaction
Reviews of Modern Physics, 2013Co-Authors: A Macchi, M Borghesi, M PassoniAbstract:Ion acceleration driven by superintense laser pulses is attracting an impressive and steadily increasing effort. Motivations can be found in the applicative potential and in the perspective to investigate novel regimes as available laser intensities will be increasing. Experiments have demonstrated, over a wide range of laser and target parameters, the generation of multi-MeV proton and ion beams with unique properties such as ultrashort duration, high brilliance, and low emittance. An overview is given of the state of the art of ion acceleration by laser pulses as well as an outlook on its future development and perspectives. The main features observed in the experiments, the observed scaling with laser and Plasma parameters, and the main models used both to interpret experimental data and to suggest new research directions are described.
Victor Malka - One of the best experts on this subject based on the ideXlab platform.
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Development and characterization of very dense submillimetric gas jets for laser-Plasma Interaction
Review of Scientific Instruments, 2012Co-Authors: F. Sylla, M. Veltcheva, S. Kahaly, Alessandro Flacco, Victor MalkaAbstract:We report on the characterization of recently developed submillimetric He gas jets with peak density higher than 1021 atoms/cm3 from cylindrical and slightly conical nozzles of throat diameter of less than 400 μm. Helium gas at pressure 300−400 bar has been developed for this purpose to compensate the nozzle throat diameter reduction that affects the output mass flow rate. The fast-switching electro-valve enables to operate the jet safely for multi-stage vacuum pump assembly. Such gaseous thin targets are particularly suitable for laser-Plasma Interaction studies in the unexplored near-critical regime.
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Particle-in-Cell modelling of laser-Plasma Interaction using Fourier decomposition
Journal of Computational Physics, 2009Co-Authors: Agustin Lifschitz, Xavier Davoine, Erik Lefebvre, Jérôme Faure, Clément Rechatin, Victor MalkaAbstract:A new Particle-in-Cell code developed for the modelling of laser-Plasma Interaction is presented. The code solves Maxwell equations using Fourier expansion along the poloidal direction with respect to the laser propagation axis. The goal of the code is to provide a three-dimensional description of the laser-Plasma Interaction in underdense Plasmas with computational load similar to bidimensional calculations. Code results are successfully compared with three-dimensional calculations.
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Particle-in-Cell modelling of laser–Plasma Interaction using Fourier decomposition
Journal of Computational Physics, 2008Co-Authors: Agustin Lifschitz, Xavier Davoine, Erik Lefebvre, Jérôme Faure, Clément Rechatin, Victor MalkaAbstract:A new Particle-in-Cell code developed for the modelling of laser–Plasma Interaction is presented. The code solves Maxwell equations using Fourier expansion along the poloidal direction with respect to the laser propagation axis. The goal of the code is to provide a three-dimensional description of the laser–Plasma Interaction in underdense Plasmas with computational load similar to bidimensional calculations. Code results are successfully compared with three-dimensional calculations.
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Nonlinear thomson scattering in relativistic laser Plasma Interaction
The European Physical Journal D, 2005Co-Authors: K.t. Phouc, Victor Malka, Antoine Rousse, F. Burgy, Jean-philippe Rousseau, D. Hulin, Donald P. UmstadterAbstract:Nonlinear Thomson scattering radiation has been observed from relativistic laser Plasma Interaction. We found that this radiative process is dominant for very high intensity at which point the relativistic scattering of the laser light originates from MeV energy electrons inside the Plasma
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Monoenergetic electron beams from relativistic laser-Plasma Interaction
CLEO Europe. 2005 Conference on Lasers and Electro-Optics Europe 2005., 1Co-Authors: Victor Malka, Jérôme Faure, Yannick GlinecAbstract:In this paper, we demonstrate the production of high quality and high energy electron beams from laser-Plasma Interaction. In a distance of 3 mm, a very collimated and quasi-monoenergetic electron beam is emitted with a 1 nanocoulomb charge at 170 MeV +/-20 MeV.
Mihai Bostan - One of the best experts on this subject based on the ideXlab platform.
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Convergence of a semi-Lagrangian scheme for the reduced Vlasov–Maxwell system for laser–Plasma Interaction
Numerische Mathematik, 2009Co-Authors: Mihai Bostan, Nicolas CrouseillesAbstract:The subject matter of this paper concerns the numerical approximation of reduced Vlasov–Maxwell models by semi-Lagrangian schemes. Such reduced systems have been introduced recently in the literature for studying the laser–Plasma Interaction. We recall the main existence and uniqueness results on these topics, we present the semi-Lagrangian scheme and finally we establish the convergence of this scheme.
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Convergence of a semi-Lagrangian scheme for the reduced Vlasov-Maxwell system for laser-Plasma Interaction
Numerische Mathematik, 2009Co-Authors: Mihai Bostan, Nicolas CrouseillesAbstract:The subject matter of this paper concerns the numerical approximation of reduced Vlasov-Maxwell models by semi-Lagrangian schemes. Such reduced systems have been introduced recently in the literature for studying the laser-Plasma Interaction. We recall the main existence and uniqueness results on these topics, we present the semi-Lagrangian scheme and finally we establish the convergence of this scheme
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On the harmonic Boltzmannian waves in laser-Plasma Interaction
Journal of Physics A: Mathematical and General, 2006Co-Authors: Mihai Bostan, Simon LabrunieAbstract:We study the permanent regimes of the reduced Vlasov-Maxwell system for laser-Plasma Interaction. A non-relativistic and two different relativistic models are investigated. We prove the existence of solutions where the distribution function is Boltzmannian and the electromagnetic variables are time-harmonic and circularly polarized.