A5012239848- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Gas Dynamics and Kinetic Theory
- Computational Fluid Dynamics and Aerodynamics
- Aquatic and Environmental Studies
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Atomic and Molecular Physics
- Pulsed Power Technology Applications
- Laser Design and Applications
- Radiative Heat Transfer Studies
- High-pressure geophysics and materials
- Ion-surface interactions and analysis
- Electromagnetic Launch and Propulsion Technology
- Material Science and Thermodynamics
- Differential Equations and Numerical Methods
- Combustion and Detonation Processes
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Laser Material Processing Techniques
- Gamma-ray bursts and supernovae
- Computer Graphics and Visualization Techniques
- Geotechnical and Geomechanical Engineering
- Vacuum and Plasma Arcs
Keldysh Institute of Applied Mathematics
2015-2024
African Explosives (South Africa)
2021
Lawrence Berkeley National Laboratory
2021
National Institutes for Quantum Science and Technology
2021
Czech Academy of Sciences, Institute of Physics
2021
University of California, Berkeley
2021
Moscow Engineering Physics Institute
2017-2020
Russian Academy of Sciences
2004-2018
Moscow Institute of Physics and Technology
2017
State Research Center of the Russian Federation
2008-2011
Guiding of relativistically intense laser pulses with peak power 0.85 PW over 15 diffraction lengths was demonstrated by increasing the focusing strength a capillary discharge waveguide using inverse bremsstrahlung heating. This allowed for production electron beams quasimonoenergetic peaks up to 7.8 GeV, double energy that previously demonstrated. Charge 5 pC at GeV and 62 in 6 peaks, typical beam divergence 0.2 mrad.
Clusters were produced as a result of argon gas cooling during expansion through supersonic nozzle. A two-dimensional model was set up in order to calculate and partial condensation into clusters. Calculations validated by experimental measurements using Mach-Zehnder interferometry Rayleigh scattering, performed with two types nozzles (Laval conical nozzles). These optical diagnostics together numerical simulations led the cluster size density determination spatial resolution jet. Cluster...
A novel mathematical model for the investigations of a cluster formation process in gas jet is presented, which enables us to obtain detailed description spatial and temporal distributions all target parameters. In this model, considered as two-phase medium, consisting continuous phase discrete condensed (clusters). The nozzle geometry also taken into account model. order confirm advantage present over conventional considerable amount numerical computations has been carried out results are...
We observed that increasing the clusters size and laser pulse contrast can enhance X-ray flux emitted by femtosecond-laser-driven-cluster plasma. By focusing a high (10(-10)) on large argon clusters, Kα-like X-rays (around 2.96 keV) is generated with total of 2.5 × 10(11) photons/J in 4π conversion efficiency 1.2 10-4. In case Kr best for L-shell 5.3 1011 1.3 10-4 and, Kα (12.7 keV), it 8 10(8) 1.6 10-6. Using this source, single-shot high-performance imaging demonstrated.
A plasma channel created by the combination of a capillary discharge and inverse Bremsstrahlung laser heating enabled generation electron bunches with energy up to 7.8 GeV in laser-driven accelerator. The an initial was used tune temperature, which optimized heating. Although colder temperatures reduced ionization degree, subsequent from heater pulse fully ionized on-axis. duration chosen be longer than hydrodynamic timescale ≈1 ns, such that later temporal slices were more efficiently...
High-resolution K -shell spectra of a plasma created by superintense laser irradiation micron-sized Ar clusters have been measured with an intensity above 10 19 W/cm 2 and pulse duration 30 fs. The total photon flux × 8 photons/pulse was achieved for He α1 resonant line (λ = 3.9491 Å, 3.14 keV). In parallel X-ray measurements, energy distributions emitted ions measured. multiply charged kinetic energies up to 800 keV were observed. It is found that hot electrons produced high contrast pulses...
The size of CO2 clusters, produced in a supersonic expansion mixed-gas CO2/He or CO2/H2 through three-staged conical nozzle designed based on the Boldarev's model, has been evaluated by measuring angular distribution light scattered from clusters. data are analyzed utilizing Mie scattering theory, and sizes clusters estimated as 0.22 μm 0.25 for cases gas mixtures, respectively. results confirm that model is reliable enough production micron-sized
One of the most robust methods, demonstrated up to date, accelerating electron beams by laser-plasma sources is utilization plasma channels generated capillary discharges. These channels, i.e., columns with a minimum density along laser pulse propagation axis, may optically guide short pulses, thereby increasing acceleration length, leading more efficient acceleration. Although spatial structure installation simple in principle, there be some important effects caused open ends capillary,...
A detailed mathematical model is presented for a submicron-sized cluster formation in binary gas mixture flowing through three-staged conical nozzle. By measuring the angular distribution of light scattered from clusters, size CO(2) produced supersonic expansion CO(2)(30%)/H(2)(70%) or CO(2)(10%)/He(90%), has been evaluated using Mie scattering method. The mean sizes clusters are estimated to be 0.28 ± 0.03 μm CO(2)/H(2) and 0.26 0.04 CO(2)/He, respectively. In addition, total density...
The research code MARPLE was originally created to model high-speed dynamic processes caused by the action of high-intensity energy fluxes on matter. At present, it is a universal tool able solve various continuum mechanics problems. implemented physical models are following: single-fluid two-temperature MHD plasma dynamics, including electron-ion exchange and generalized Ohm’s law; electrical thermal conductivity taking into account anisotropy in magnetic field; radiative heat transfer:...
High temperature plasmas have been created by irradiating Ar clusters with high intensity 60-fs laser pulses. Detailed spectroscopic analysis of spatially resolved, resolution x-ray data near the He(alpha) line is consistent a two-temperature collisional-radiative model incorporating effects highly energetic electrons. The results spectral are compared theoretical hydrodynamic cluster production, as well interferometric data. plasma parameters notably uniform over one Rayleigh length (600 microm).
Under typical experimental conditions related to the interaction of a short pulse laser with nanometer foil target, assumption target step-function number density profile ceases be valid due existence nanosecond long amplified spontaneous emission pedestal prior arrival main pulse. As consequence, formation low extended preplasma should considered, making achievement high ion energy extremely challenging. In this work, multiparametric study various distributions is presented, obtained by...
Abstract The results of experiments on the study plasma compression nested wire arrays mixed composition and generation powerful pulses soft x-ray radiation (SXR), carried out a pulse power facility Angara-5-1 at current level up to 3 MA, are presented. Based latest experimental data intensity formation various substances <?CDATA $\dot m$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover> <mml:mi>m</mml:mi> <mml:mo>˙</mml:mo> </mml:mover> </mml:math>...
At the Angara-5-1 facility investigation was carried out which studied interaction of plasma flows and magnetic field. They are created by current implosion cylindrical nested wire arrays, inner outer array composed from thin wires or dielectric fibers. It has been shown experimentally that at formation stage it is possible to realize various modes between field discharge inside array. A mechanism proposed for with current-carrying The stability compression final its depends on nature this...
Plasma properties inside a hydrogen-filled capillary discharge waveguide were modeled with dissipative magnetohydrodynamic simulations to enable analysis of capillaries circular and square cross-sections implying that can be used guide circularly-symmetric laser beams. When the quasistationary stage is reached, plasma temperature in vicinity axis has almost same profile for both capillaries. The effect cross-section on electron beam focusing studied using simulation-derived magnetic field...