A5067304271- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Advanced X-ray Imaging Techniques
- Laser Material Processing Techniques
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Dust and Plasma Wave Phenomena
- Particle Accelerators and Free-Electron Lasers
- Advanced Fiber Laser Technologies
- Quantum optics and atomic interactions
- Ion-surface interactions and analysis
- Characterization and Applications of Magnetic Nanoparticles
- Solid State Laser Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Advanced Surface Polishing Techniques
- Photorefractive and Nonlinear Optics
- Nonlinear Photonic Systems
- Material Properties and Applications
Joint Institute for High Temperatures
2015-2024
Moscow Power Engineering Institute
2020-2024
Moscow Institute of Physics and Technology
2012-2024
Institute of Physics and Technology
2023
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
1981-2021
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2019-2021
Moscow Aviation Institute
2021
Université de Bordeaux
2021
Centre Lasers Intenses et Applications
2021
Centre National de la Recherche Scientifique
2021
Ultra-intense MeV photon and neutron beams are indispensable tools in many research fields such as nuclear, atomic material science well medical biophysical applications. For astrophysical applications aimed for laboratory investigations, fluxes excess of 10$^{21}$ n/(cm$^2$ s) required. Such ultra-high unattainable with existing conventional reactor- accelerator-based facilities. Currently discussed concepts generating high-flux based on ultra-high-power multi-petawatt lasers operating at...
Abstract This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over last four years in unique collaboration 41 laboratories within Horizon 2020 study funded by Union. EuPRAXIA is first project that develops dedicated particle accelerator based on novel plasma acceleration concepts and laser technology. It focuses development electron accelerators underlying technologies, their user communities, exploitation existing...
Directed x-rays produced in the interaction of sub-picosecond laser pulses moderate relativistic intensity with plasma near-critical density are investigated. Synchrotron-like (betatron) radiation occurs process direct acceleration (DLA) electrons a channel when undergo transverse betatron oscillations self-generated quasi-static electric and magnetic fields. In an experiment at PHELIX system, high-current directed beams DLA mean energy ten times higher than ponderomotive potential maximum...
An equation is derived that describes the linear response of an underdense inhomogeneous plasma [ω0≫ωp(r), where ω0 and ωp(r) are laser-carrier frequencies, respectively] during propagation a laser pulse along axis channel with characteristic width Rch. For wide channel, i.e., when Rch/λp0>1 (where λp0=2πc/ωp0 wavelength excited wave ωp0 frequency at axis), structure wake field studied analytically. It shown this changes distance from trailing edge pulse. As result, certain behind...
Abstract Low-density polymer foams pre-ionized by a well-controlled nanosecond pulse are excellent plasma targets to trigger direct laser acceleration (DLA) of electrons sub-picosecond relativistic pulses. In this work, the influence on DLA process is investigated. The density profile generated after irradiating foam with was simulated two-dimensional hydrodynamic code, which takes into account high aspect ratio interaction and microstructure foams. obtained used as input three-dimensional...
Laser contrast is a crucial parameter in experiments with high-intensity high-energy pulses. For relativistic intensities of the main pulse ≳1019W/cm2, even high-contrast beams can produce plasma on target surface due to long nanosecond prepulse action which results an undesirable early smearing target. In particular, dynamics thin foils under especially important for laser ion acceleration technique and x-rays generation. To avoid influence prepulse, foil be arranged front The analysis...
The properties of the eigenmodes a capillary tube are examined in context ultrashort intense laser pulse guiding. dispersion relation for cylindrical hollow waveguide is derived and family EH(nus) shown to be solution wave equation up first order under condition k(0)a >>1, where k(0) light number radius. expressions fields given at zero small parameter equal ratio perpendicular longitudinal absorbed intensity wall estimated.
Direct laser acceleration (DLA) of electrons in a plasma near-critical electron density (NCD) and the associated synchrotron-like radiation are discussed for moderate relativistic intensity (normalized amplitude a0 ≤ 4.3) ps length pulse. This regime is typical kJ PW-class facilities designed high-energy-density (HED) research. In experiments at PHELIX facility, it has been demonstrated that interaction 1019 W/cm2 sub-ps pulse with sub-mm NCD results generation high-current well-directed...
High performance of laser-driven sources radiation is in focus research aimed at the study high energy density matter, pair production and neutron generation using kJ PW-laser systems. In this work, we present a highly efficient approach to generate an ultra-high flux, high-energy bremsstrahlung interaction direct laser-accelerated (DLA) electrons with several-millimeters-thick high-Z converter. A directed beam energies up 100 MeV was produced sub-ps laser pulse moderate relativistic...
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 Enhancement of K α yield from a metal foil covered with rods submicron sizes, low aspect ratio, irradiated by p -polarized femtosecond laser pulses about 10 17 W/cm 2 intensity is demonstrated. Obtained relative increase in X-ray line emission explained model vacuum heating fast electrons.
Abstract Direct laser acceleration (DLA) of electrons in plasmas near-critical density (NCD) is a very advancing platform for high-energy PW-class lasers moderate relativistic intensity supporting Inertial Confinement Fusion research. Experiments conducted at the PHELIX sub-PW Nd:glass demonstrated application-promising characteristics DLA-based radiation and particle sources, such as ultra-high number, high directionality conversion efficiency. In this context, bright synchrotron-like...
Abstract The irradiation of thin films by intensive subpicosecond laser pulses with nanosecond prepulse is accompanied a number various physical processes. beam transmissions through the film as well re-emission flux on both sides plasma have been evaluated simulation for Al and CH 2 materials. It has demonstrated that thickness can be chosen to cut off long whereas main pulse transmitted plasma. Thus, useful contrast improvement in experiments different targets. Nevertheless, energy...
An investigation was made of the possibility conversion high-power laser beams into hollow Bessel with first maximum in radial field distribution form a ring and slight variation direction propagation. analysis influence real conditions during formation such on their parameters. The limits were found divergence intial radiation characteristics one components (phase screw). These had to be kept for tube. Experiments carried out aid beam former consisting an axicon phase screw, also kinoform...
The phase velocity of a laser-driven wakefield can be efficiently controlled in plasma channel. A beatwave two long laser pulses is used. frequency difference between these equals the local frequency, so that slow resonant excitation wave possible. Because driver energy spread over many periods, interference pattern run with an arbitrary along channel and generate same velocity. This defined by radius structure transverse modes excited wake matched exactly to witness vacuum speed light for...
A non-symmetrical theoretical model is used to describe the propagation of laser beams in dielectric capillary waveguides under non-ideal coupling conditions. The displacement beam focusing point from axis, deviation transverse energy distribution a symmetric one, and an angle incidence different zero modify, through excitation beating several modes, repartition during waveguides. results modeling are very good agreement with experimental results, obtained low-intensity on test bench, where...
Consistent analysis of the bunch charge (beam loading effect) influence on energy characteristics accelerated electrons is presented. In 1-D approximation, simple analytical expression for optimum electron density derived, which minimizes spread when maximum gain achieved. For wide bunches, all predictions are confirmed by results numerical modeling. First, self-consistent simulation obtained code LAser-PLasma ACceleration new scheme low-energy injection in front laser pulse and analyzed.
Laser wakefield in a gas-filled capillary driven by 1-TW femtosecond Ti:Sa laser pulse is studied experimentally observing driving spectrum modifications, which are caused the combined action of optical field ionization and plasma density oscillations. Good agreement between results extensive numerical simulations experimental data allows us to estimate accelerating gradients wake, range from 5 10 MV/cm for typical conditions.
The permittivity of Lorentz plasmas and wide-range expression for effective frequency collisions electrons are considered in wide temperature range. proposed fulfills all limiting cases (high- low-frequency skin effect, degenerate nondegenerate plasmas) permits one to incorporate different physical phenomena warm dense matter like contribution electron-phonon umklamp process permittivity. For the case aluminum plasmas, model takes into account both intraband interband contributions via...