A5032448001- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Laser-Matter Interactions and Applications
- Pulsed Power Technology Applications
- Particle accelerators and beam dynamics
- Laser Design and Applications
- Cloud Computing and Resource Management
- Software System Performance and Reliability
- Electromagnetic Launch and Propulsion Technology
- Ionosphere and magnetosphere dynamics
- Particle Accelerators and Free-Electron Lasers
- High-pressure geophysics and materials
- Distributed and Parallel Computing Systems
- Electrohydrodynamics and Fluid Dynamics
- Plasma Applications and Diagnostics
- Vacuum and Plasma Arcs
- Laser Material Processing Techniques
- Ion-surface interactions and analysis
- Embedded Systems Design Techniques
- Diamond and Carbon-based Materials Research
- Aquatic and Environmental Studies
- Parallel Computing and Optimization Techniques
- Atomic and Molecular Physics
Extreme Light Infrastructure Beamlines
2024
Keldysh Institute of Applied Mathematics
2012-2024
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
National Research Nuclear University MEPhI
2017-2020
Kurchatov Institute
2017
Russian Academy of Sciences
2010-2013
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.
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...
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,...
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...
Laser-heated capillary discharge waveguides are novel, low plasma density guiding structures able to guide intense laser pulses over many diffraction lengths and have recently enabled the acceleration of electrons 7.8 GeV by using a laser-plasma accelerator (LPA). These devices represent an improvement conventional waveguides, as channel matched spot size can be tuned independently radius. This has allowed petawatt-scale focused small sizes within large diameter capillaries, preventing...
Plasma discharge in the capillary is used to develop x-ray lasers, waveguides for high power laser pulses, and as active plasma lenses focus energy charged particle beams. Capillary discharges repetition rate regime are of interest applications that require large average values, such luminosity and/or electric current accelerated particles. In present paper, we study connection with ultrashort pulse guiding electron acceleration. Using magnetohydrodynamic computer simulations theoretical...
Dissipative capillary discharges form plasma channels which allow for high power laser guiding, enabling efficient electron acceleration in a wakefield accelerator. However, at the low densities required to produce high-energy electrons, order avoid wall damage, lasers need tighter transverse confinement that cannot be achieved by discharge powered Ohmic heating alone. The introduction of an additional leads deeper and narrower channels. Here we investigate formation laser-heated axially...
A method for the asymmetric focusing of electron bunches, based on active plasma lensing technique is proposed. This takes advantage strong inhomogeneous magnetic field generated inside capillary discharge to focus ultrarelativistic electrons. The and parameters are described theoretically modeled with dissipative magnetohydrodynamic computer simulations enabling analysis capillaries rectangle cross-sections. Large aspect ratio rectangular might be used transport beams high emittance...
A comprehensive model of processes in a discharge capillary is required order to obtain nominal parameters preformed plasma channel suitable for the laser wake-field acceleration. We present three-dimensional magnetohydrodynamics simulations hydrogen gas filling process and formation short square shaped with supply channels. Time evolution pressure density chosen current profile analyzed. Performed provide distributions electric current, magnetic field, electron along whole channel, taking...
The plasma channel formation in the focus of a knife-like nanosecond laser pulse irradiating gas target is studied theoretically, and gas-dynamics computer simulations. distribution electromagnetic field region, obtained analytically, used to calculate energy deposition plasma, which then implemented magnetohydrodynamic code. modelling evolution shows that profile, can guide pulse, formed by tightly focused short lasers. results simulations show proper choice convergence angle beam...
In 2014, electron beams with energy up to 4.3 GeV were obtained using 9 cm-long capillary discharge plasma waveguides and laser pulses peak power 310 TW [1]. Although the available was 1 PW, at that time it not possible increase beam further since effective laser-guiding of 60 micron focal spot lower density possible. Usually radius would be reduced channel depth achieve matched guiding laser, but for PW significant damage typically occur. The concept inverse bremsstrahlung heating inside a...
The 3D radiative-magnetohydrodynamic code MARPLE (KIAM RAS) was applied to simulations of wire-array Z-pinch experiments on ANGARA-5-1 pulsed power facility (TRINITI, Russia). Different configurations wire arrays accelerated by the current up 3.5 MA (pulse rise time 100 ns) were investigated as soft X-ray sources.
Summary form only given. The project BELLA (LBNL, USA) is aimed to create an experimental facility for further advancing the development of laser-driven electron acceleration <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> . BELLA's unique attribute ability use laser light accelerate beam up 10 GeV level in a comparatively short distance approximately one meter. takes place during propagation high power femtosecond pulse plasma formed...
Summary form only given. A design of fast current switch using wire explosion is a problem studying by our team experimentally and numerically. The main unit the experimental setup represents itself two coaxial cylindrical electrodes connected thin single which exploded pulse. In experiments with amplitude up to 80 kA rise time 7 μs flowing through 4-mm tungsten wire. Plasma generated fills inter-electrode space "circularly" owing interaction magnetic field (up 30 kG) produced an external...
Summary form only given. We study possibility to design fast current switch using wire explosion. It was carried out series of experiments on explosion single connecting two coaxial cylindrical electrodes. Current with the amplitude value 80 kA and rise time 7 μs flowing through 4-μm tungsten wire. The outer magnetic field (up 30 kG) directed along Setup allow us change between electrodes measure total resistance interelectrode volume. So we can PPT plasma dynamics at different currents...
We study possibility to design fast current switch using wire explosion. It was carried out series of experiments on explosion single connecting two coaxial cylindrical electrodes. Current with the amplitude value 80 kA and rise time 7 μs flow through 4-μm tungsten wire. The outer magnetic field (up 30 kG) directed along Setup allow us change flowing between electrodes measure total resistance interelectrode space. So we can POS plasma dynamics different currents (current is changed in range...
We investigate the main physical processes that limit repetition rate of capillary discharges used in laser accelerators electrons theoretically and with computer simulations. consider capillary. assume a cooling system independently maintains temperature balance capillary, as well gas supply vacuum maintain conditions outside The most important factor, determining highest rates this case, is length, which governs refilling time by gas. For short for acceleration sub-GeV electron beams,...