A5001241268- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Advanced Data Storage Technologies
- Advanced Fiber Laser Technologies
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- High-pressure geophysics and materials
- Parallel Computing and Optimization Techniques
- Distributed and Parallel Computing Systems
- Electromagnetic Simulation and Numerical Methods
- Particle Detector Development and Performance
- Laser Material Processing Techniques
- Security and Verification in Computing
- Spectroscopy Techniques in Biomedical and Chemical Research
- Nuclear Physics and Applications
- Solid State Laser Technologies
- Dust and Plasma Wave Phenomena
- Atomic and Molecular Physics
- Lightning and Electromagnetic Phenomena
- Astrophysics and Cosmic Phenomena
- Computational Physics and Python Applications
Université Paris-Saclay
2015-2024
Laboratoire Interactions, Dynamiques et Lasers
2015-2024
CEA Paris-Saclay
2014-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2024
Centre National de la Recherche Scientifique
2015-2023
KTH Royal Institute of Technology
2023
Institut Rayonnement-Matière de Saclay
2012-2022
CEA Paris-Saclay - Etablissement de Saclay
2015-2021
Lawrence Berkeley National Laboratory
2015-2018
École Polytechnique
2015-2018
Under the effect of even simple optical components, spatial properties femtosecond laser beams can vary over duration light pulse. We show how using such spatiotemporally coupled fields in high harmonic generation experiments (e.g., gases or dense plasmas) enables production attosecond lighthouses, i.e., sources emitting a collection angularly well-separated beams, each consisting an isolated This general opens way to new sources, particularly suitable for pump-probe experiments, and...
High-order harmonics and attosecond pulses of light can be generated when ultraintense, ultrashort laser reflect off a solid-density plasma with sharp vacuum interface, i.e., mirror. We demonstrate experimentally the key influence steepness plasma-vacuum interface on interaction, by measuring spectral spatial properties mirror whose initial density gradient scale length $L$ is continuously varied. Time-resolved interferometry used to separately measure this length.
The advent of ultrahigh-power femtosecond lasers creates a need for an entirely new class optical components based on plasmas. most promising these are known as plasma mirrors, formed when intense laser ionizes solid surface. These mirrors specularly reflect the main part pulse and can be used active elements to manipulate its temporal spatial properties. Unfortunately, considerable pressures exerted by deform mirror surface, unfavourably affecting reflected beam complicating, or even...
A laser system producing controllable and stable pulses with high power ultrashort duration at repetition rate is a key component of energy laser-plasma accelerator (LPA). Precise characterization control properties are essential to understanding interactions required build 10-GeV class LPA. This paper discusses the diagnostics, performance parameters 1 Hz, petawatt (PW) Berkeley Lab Laser Accelerator (BELLA) facility. The BELLA PW provided up 46 J on target 1% level fluctuation 1.3-μrad...
The interaction of intense laser beams with plasmas created on solid targets involves a rich non-linear physics. Because such dense are reflective for light, the coupling incident beam occurs within thin layer at interface between plasma and vacuum. One main paradigms used to understand this coupling, known as Brunel mechanism, is expected be valid only very steep surfaces. Despite innumerable studies, its validity range remains uncertain, physics involved smoother plasma-vacuum interfaces...
In this letter, cutting-edge 3D Particle-In-Cell simulations are used to demonstrate that so-called relativistic plasma mirrors irradiated by PetaWatt (PW) lasers and naturally curved laser radiation pressure can be tightly focus Doppler-generated harmonics extreme intensities between $10^{25}-10^{26}W.cm^{-2}$. Those then employed develop validate a general model of harmonic focusing mirror. Finally, the insight gained from is propose novel all-optical techniques would further increase...
(150 word max) We present a first-of-kind mesh-refined (MR) massively parallel Particle-In-Cell (PIC) code for kinetic plasma simulations optimized on the Frontier, Fugaku, Summit, and Perlmutter supercomputers. Major innovations, implemented in WarpX PIC code, include: (i) three level parallelization strategy that demonstrated performance portability scaling millions of A64FX cores tens thousands AMD Nvidia GPUs (ii) groundbreaking mesh refinement capability provides between 1.5 x to 4...
This paper provides an overview of ultrafast wavefront rotation femtosecond laser pulses and its various applications in highly nonlinear optics, focusing on processes that lead to the generation high-order harmonics attosecond pulses. In this context, can be exploited different ways, obtain new light sources for time-resolved studies, called 'attosecond lighthouses', perform measurements optical processes, using 'photonic streaking', or track changes carrier–envelope relative phase The...
WarpX is a general purpose electromagnetic particle-in-cell code that was originally designed to run on many-core CPU architectures. We describe the strategy, based AMReX library, followed allow use GPU-accelerated nodes OLCF’s Summit supercomputer, strategy we believe will extend upcoming machines Frontier and Aurora. summarize challenges encountered, lessons learned, give current performance results series of relevant benchmark problems.
The fully electromagnetic particle-in-cell code WarpX is being developed by a team of the U.S. DOE Exascale Computing Project (with additional non-U.S. collaborators on part code) to enable modeling chains tens hundreds plasma accelerator stages exascale supercomputers, for future collider designs. combining latest algorithmic advances (e.g., Lorentz boosted frame and pseudo-spectral Maxwell solvers) with mesh refinement runs computer processing unit graphical (GPU) architectures. In this...
We propose a scheme to explore regimes of strong-field Quantum Electrodynamics (SF-QED) otherwise unattainable with the currently available laser technology. The relies on relativistic plasma mirrors curved by radiation pressure boost intensity PetaWatt-class pulses Doppler effect and focus them extreme field intensities. show that very clear SF-QED signatures could be observed placing secondary target where boosted beam is focused.
Abstract The quantum vacuum plays a central role in physics. Quantum electrodynamics (QED) predicts that the properties of fermionic can be probed by extremely large electromagnetic fields. typical field amplitudes required correspond to onset ‘optical breakdown’ this vacuum, expected at light intensities >4.7×10 29 W/cm 2 . Approaching ‘Schwinger limit’ would enable testing major but still unverified predictions QED. Yet, Schwinger limit is seven orders magnitude above present record...
Particle in Cell (PIC) simulations are a widely used tool for the investigation of both laser- and beam-driven plasma acceleration. It is known issue that beam quality can be artificially degraded by numerical Cherenkov radiation (NCR) resulting primarily from an incorrectly modeled dispersion relation. Pseudo-spectral solvers featuring infinite order stencils strongly reduce NCR—or even suppress it—and therefore well suited to correctly model properties. For efficient parallelization PIC...
Spatial properties of high-order harmonic beams produced by high-intensity laser-matter interactions carry rich information on the physics generation process, and their detailed understanding is essential for applications these light beams. We present a thorough study in case from plasma mirrors, up to relativistic interaction regime. In situ ptychographic measurements amplitude phase spatial profiles different orders target plane are presented, as function key parameters. These used...
Using 1D and 2D PIC simulations, we describe model the backward ejection of electron bunches when a laser pulse reflects off an overdense plasma with short density gradient on its front side. The dependence intensity scale length is studied. It found that during each period, incident generates large charge-separation field, or capacitor, which accelerates attosecond bunch electrons toward vacuum. This process maximized for lengths collapses comparable to wavelength. We develop reproduces...
This document provides detailed information on the status of Advanced and Novel Accelerators techniques describes steps that need to be envisaged for their implementation in future accelerators, particular high energy physics applications. It complements overview prepared update European Strategy particle physics, a description field. The scientific priorities community are described each technique acceleration able achieve accelerating gradient GeV~range or above. ALEGRO working group...
Abstract As part of the Snowmass'21 community planning excercise, Advanced Accelerator Concepts (AAC) proposed future linear colliders with center-of-mass energies up to 15 TeV and luminosities 50 × 10 34 cm -2 s -1 in a compact footprint. In addition being compact, these machines must also be energy efficient. We identify two challenges that addressed design machines. First, Beam Delivery System (BDS) not add significant length accelerator complex. Second, beam parameters chosen mitigate...
With the advent of PW class lasers, very large laser intensities attainable on-target should enable production intense high order Doppler harmonics from relativistic laser-plasma mirrors interactions. At present, modeling these with Particle-In-Cell (PIC) codes is extremely challenging as it implies an accurate description tens harmonic orders on a broad range angles. In particular, we show here that standard Finite Difference Time Domain (FDTD) Maxwell solvers used in most PIC partly fail...