A5000671491- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Terahertz technology and applications
- Gyrotron and Vacuum Electronics Research
- High-pressure geophysics and materials
- Laser Design and Applications
- Atomic and Molecular Physics
- Advanced X-ray Imaging Techniques
- Superconducting and THz Device Technology
- Spectroscopy and Laser Applications
- Particle Accelerators and Free-Electron Lasers
- Mass Spectrometry Techniques and Applications
- Planetary Science and Exploration
- Particle accelerators and beam dynamics
- Diamond and Carbon-based Materials Research
- Semiconductor Quantum Structures and Devices
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Laser Material Processing Techniques
Moscow Engineering Physics Institute
2020-2025
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2023-2024
Institute of Applied Physics
2023
Institute of Engineering Physics
2021
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...
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...
Interaction of relativistically intense ultrashort laser pulses with an extended surface flat or curved targets at a grazing angle is studied via numerical particle-in-cell simulations. Processes electron acceleration and generation electromagnetic discharge current propagating along the target are analyzed. In case surface, results 3D modeling interaction compared 2D modeling, where conditions assumed to be same transverse z coordinate. The geometry dependence pulse propagation in analyzed...
Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates strong discharge wave that travels as narrow along the surface. The travelling efficiently emits secondary radiation spectral characteristics mostly defined by geometry. Several exemplary designs are considered in context generation terahertz controllable for various scientific and technological applications. proposed setup benefits its robustness, versatility high conversion efficiency energy to radiation,...
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...
Optical generation of kilo-tesla scale magnetic fields enables prospective technologies and fundamental studies with unprecedentedly high field energy density. A question is the optimal configuration proposed setups, where plenty physical phenomena accompany complicate both theoretical experimental realizations. Short laser drivers seem more suitable in many applications, though process tangled by an intrinsic transient nature. In this work, artificial neural network engaged for unravelling...
Generation of terahertz radiation by an oscillating discharge, excited short laser pulses, may be controlled geometry the irradiated target. In this work, annular target with a thin slit is considered as efficient emitter secondary when driven intense pulse. Under irradiation, works diode, which quickly filled dense plasmas, closing circuit for traveling discharge Such diode defines pulse propagation direction in closed contour, enabling its multiple passes along coil. The obtained charge...
A strong quasistationary magnetic field is generated in hollow targets with curved internal surface under the action of a relativistically intense picosecond laser pulse. Experimental data evidence formation strongly magnetized plasma structures decaying on hundred picoseconds timescale, strength kilotesla scale. Numerical simulations unravel importance transient processes during generation and suggest existence fast slow regimes plasmoid evolution depending interaction parameters. The...
This work presents a general concept of an intense laser-driven source strong electromagnetic waves, which can be used for obtaining powerful terahertz radiation with controlled polarization. It is shown that the irradiation solid target surface by short relativistic laser pulses at small angles provides excitation compact discharge current pulses, propagating in certain direction. For elliptical targets, this emits elliptically polarized given frequency ellipticity and spectra defined...
A neural network-based approach is proposed both for reconstructing the focal spot intensity profile and estimating peak of a high-power tightly focused laser pulse using angular energy distributions protons accelerated by from rarefied gases. For these purposes, we use convolutional network architecture. Training testing datasets are calculated test particle method, with description in form Stratton–Chu integrals, which model pulses an off-axis parabolic mirror down to diffraction limit. To...
The work considers an optical scheme for collimation of high-energy proton beams using $\sim 10^5$ T scale magnetic fields induced in a miniature "snail" target by petawatt or multi-petawatt laser irradiation ps fs regime. Such are known to be frozen into hot plasma and exist on at least hundred picoseconds time-scale, allowing their use control charged particle beams. high values the field along with compact size perfectly match conditions all-in-one setup, where first, beam accelerates...
The effects leading to generation of quasi-stationary and propagating electromagnetic fields during the propagation a laser-driven current discharge pulse in extended targets are considered. results numerical modeling describe interaction relativistically intense ultrashort laser with an dense target its transformation into powerful pulse. It is shown that under certain conditions such can be used generate strong spatio-temporal properties. Particular attention paid influence parameters on...
This work considers a solenoid-based magnetic collimation system for improving the efficiency of ion trap loading with ions created by laser ablation. We discuss physical model beam in such system, provide qualitative analytical estimates its characteristics, develop numerical based on test-particle approach, and describe real experimental setup where proposed approach is effectively employed to collimate 232Th3+ 88Sr1+ ions. The results are compared performed modeling. observed...
We demonstrate laser-driven Helium ion acceleration with cut-off energies above 25 MeV and peaked number $10^8$ /MeV for 22(2) projectiles from near-critical density gas jet targets. employed shock nozzles at the high-repetition-rate (HRR) VEGA-2 laser system 3 J in pulses of 30 fs focused down to intensities range between $9\times10^{19}$ W/cm$^2$ $1.2\times10^{20}$ W/cm$^2$. spectra minor shot-to-shot changes small variations target profile. Difference profiles arise due being exposed a...
Abstract Optical generation of kilo-tesla scale magnetic fields enables prospective technologies and fundamental studies with unprecedentedly high field energy density. A question is the optimal configuration proposed setups, where plenty physical phenomena accompany complicate both theoretical experimental realizations. Short laser drivers seem more suitable in many applications, though process tangled by an intrinsic transient nature. In this work, artificial neural network engaged for...
Optical generation of energetic particle bunches requires high-power laser facilities operating in picosecond or femtosecond temporal domain. It is therefore preferable to use short pulses all-optical platforms designed for guiding and focusing such beams, increasing their brightness decreasing angular divergence. We propose discuss theoretical experimental results a novel electromagnetic setup based on shaped spiral-like 'snail' target with relatively large useful aperture. Due the diameter...
Abstract Proton radiography is a common diagnostic technique in laser-driven magnetic field generation studies. It based on measuring proton beam deflection electromagnetic fields induced around the target with help of radiochromic film stacks. Unraveling information recorded experimental radiographs and extracting profiles not always straightforward task. In this paper, some aspects data analysis by reproducing numerical simulations are described. The approach allows determining strength...
Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates strong discharge wave that travels as narrow along the surface. The travelling efficiently emits secondary radiation spectral characteristics mostly defined by geometry. Several exemplary designs are considered in context generation terahertz controllable for various scientific and technological applications. proposed setup benefits its robustness, versatility high conversion efficiency energy to radiation,...