A5006252654- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Magnetic confinement fusion research
- Pulsed Power Technology Applications
- Gyrotron and Vacuum Electronics Research
- Laser-Matter Interactions and Applications
- High-pressure geophysics and materials
- Plasma Diagnostics and Applications
- Atomic and Molecular Physics
- Ionosphere and magnetosphere dynamics
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Electrostatic Discharge in Electronics
- Laser Design and Applications
- Advanced X-ray Imaging Techniques
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Electronic and Structural Properties of Oxides
- Ion-surface interactions and analysis
- Solid State Laser Technologies
- Radiation Therapy and Dosimetry
- Plasma Applications and Diagnostics
- Advanced Optical Sensing Technologies
- Hydraulic flow and structures
- Particle Accelerators and Free-Electron Lasers
Czech Academy of Sciences, Institute of Plasma Physics
2016-2025
Czech Academy of Sciences
2017-2025
Czech Academy of Sciences, Institute of Physics
2016-2025
Czech Technical University in Prague
2017-2025
Texas A&M University
2024
National Research Nuclear University MEPhI
2017
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2017
Queen's University Belfast
2017
Institute of Plasma Physics and Laser Microfusion
2017
Warsaw University of Technology
2017
ELI-Beamlines (ELI-BL), one of the three pillars Extreme Light Infrastructure endeavour, will be in a unique position to perform research high-energy-density-physics (HEDP), plasma physics and ultra-high intensity (UHI) (1022W/cm2) laser–plasma interaction. Recently need for HED laboratory was identified P3 (plasma platform) installation under construction ELI-BL an answer. The 10 PW laser makes possible fundamental topics from high-field new extreme states matter such as radiation-dominated...
We obtain new entropy and mutual information formulae for regenerative stochastic processes. use them on Markov channels to generalize the results in Goldsmith Varaiya (1996). Also we tighter bounds capacity better algorithms than Varaiya.
The discovery of chirped pulse amplification has led to great improvements in laser technology, enabling energetic beams be compressed durations tens femtoseconds and focused a few micrometers. Protons with energies MeV can accelerated using, for instance, target normal sheath acceleration on secondary targets. Under such conditions, nuclear reactions occur, the production radioisotopes suitable medical application. use high-repetition lasers produce isotopes is competitive conventional...
Abstract Tight focusing with very small f -numbers is necessary to achieve the highest at-focus irradiances. However, tight imposes strong demands on precise target positioning in-focus on-target irradiance. We describe several near-infrared, visible, ultraviolet and soft hard X-ray diagnostics employed in a ∼10 22 W/cm 2 laser–plasma experiment. used nearly 10 J total energy femtosecond laser pulses focused into an approximately 1.3-μm focal spot 5–20 μm thick stainless-steel targets....
Abstract The ion temperature in laser-heated foam materials can be considerably higher than the electron due to internal collisions of plasma flows originating from heterogeneous microstructure. 
Recently, we have developed a novel hybrid multiscale model for laser-foam interaction that successfully reproduces experimentally measured heat front propagation subcritical foams various densities. However, when applied undercritical with average density closer critical, simulations...
<title>Abstract</title> Cavity Pressure Acceleration (CPA) is a technique for accelerating dense plasma streams by utilizing laser-generated plasmapressure within spatially confined region. This approach has been proposed as an alternative to the classical ablativeacceleration of plasma. Initially, primary goal this was create stream (a theoretical macroparticle delivering energy/momentum) suitable experiments related Impact Fast Ignition. In recent experimentalsessions, we used targets...
Driving of the nuclear fusion reaction p + 11B → 3α 8.7 MeV under laboratory conditions by interaction between high-power laser pulses and matter has become a popular field research, owing to its numerous potential applications: as an alternative deuterium–tritium for energy production, astrophysics studies, alpha-particle generation medical treatment. One possible scheme laser-driven p–11B reactions is direct beam laser-accelerated protons onto boron (B) sample (the so-called...
High power microwave (HPM) generation studies were carried out in KALI-5000 pulse system. The intense relativistic electron beam was utilized to generate HPMs using a coaxial virtual cathode oscillator. typical parameters 350 kV, 25 kA, and 100 ns, with few hundreds of ampere per centimeter square current density. Microwaves generated graphite polymer velvet at various diode voltage, current, accelerating gaps. A horn antenna setup detector attenuators used measure the power. It observed...
The magnetic quadrupole structure formation during the interaction of two ultra-short high power laser pulses with a collisionless plasma is demonstrated 2.5-dimensional particle-in-cell simulations. subsequent expansion accompanied by field annihilation in ultrarelativistic regime, when can not be sustained current. This results dominant contribution displacement current exciting strong large scale electric field. leads to conversion energy into kinetic accelerated electrons inside thin sheet.
Relativistic electrons generated by the interaction of petawatt-class short laser pulses with solid targets can be used to generate bright X-rays via bremsstrahlung. The efficiency energy transfer into these depends on multiple parameters including focused intensity and pre-plasma level. This paper reports experimental results from a high glass at maximum $10^{19}$ W/cm$^2$. In-situ measurements specularly reflected light are provide an upper bound absorption characterize intensity, level...
We experimentally demonstrate the generation of quasi-monoenergetic electron bunch at end energy distribution. The experiment was conducted Prague Asterix Laser System where iodine laser supplies up to 600 J fundamental wavelength 1.315 μm with a pulse duration 350 ps. thickness different target materials (Cu, Sn, Ta, Pb) varied between 10 and 25 μm. spectrum electrons measured using an array spectrometers angular directions respect axis. Three frame femtosecond interferometry driven by...
This paper presents the calibration of two different kinds image plates (IPs) for detecting electrons with kinetic energy in range 150 keV–1.75 MeV. The was performed using a 90Sr β source. also provides measured fading response IPs time from 12 min to 18 h. Calibration results are compared Monte Carlo simulations deposited by sensitive layer IPs. It found that within this linear relation between simulated electron phosphor and photo stimulated luminescence IP is adequate model IP.
This article describes the design and presents recent results from testing calibration of a forward Compton scattering high energy X-ray spectrometer. The was performed using bremsstrahlung source on photon facility at γ Electron linac for beams with brilliance low emittance accelerator Helmholtz-Zentrum Dresden-Rossendorf, which provides photons energies up to 18 MeV. conducted different end point energies—10.5, 13, 15, Experimental spectra show systematic increase in maximum energy,...
A pulse power system (1 MV, 50 kA, and 100 ns) based on Marx generator Blumlein forming line has been studied for characterization of a general system. Total erected inductance series resistance are calculated from modular testing with Blumlein. The complete tested the termination liquid resistor load finding characteristic impedance. Equivalent electrical circuits during charging discharging constructed characterized parameters These equivalent can be used in analysis prepulse voltage droop...
We report the observation of electron-temperature-gradient (ETG) driven turbulence in laboratory plasma a large volume device. The removal unutilized primary ionizing and nonthermal electrons from uniform density imposition control gradient electron temperature ($\ensuremath{\nabla}{T}_{e}$) are all achieved by placing (2 m diameter) magnetic energy filter middle In dressed plasma, observed ETG lower hybrid range frequencies $\ensuremath{\nu}=(1--80\text{ }\text{ }\mathrm{kHz})$ is...
Abstract Laser plasma created by intense light interaction with matter plays an important role in high-energy density fundamental studies and many prospective applications. Terawatt laser-produced related to the low collisional relativistic domain may form supersonic flows is prone generation of strong spontaneous magnetic fields. The comprehensive experimental study presented this work provides a reference point for theoretical description laser-plasma interaction, focusing on hot electron...
The problem of spontaneous magnetic field generation with nanosecond laser pulses raises a series fundamental questions, including the intrinsic magnetization mechanisms in laser-driven plasmas and understanding charge-discharge processes irradiated target. These two issues are tightly bound as defined by currents, which have turn feedback fields plasma. Using direct polaro-interferometric measurements theoretical analysis, we show that at parameters related to PALS system (1.315 μm, 350 ps,...
This paper describes design, development, and implementation of a multi-channel magnetic electron spectrometer for the application in laser–plasma interaction experiments carried out at Prague Asterix Laser System. Modular design allows setup variable configurations to evaluate angular distribution hot emission. The array configuration spectrometers consists 16 channels mounted around target. modules incorporate plastic collimator designed suppress secondary radiation by absorbing wide angle...
The shot to variation in perveance of a planar diode with explosive emission graphite cathode range accelerating gaps 3–12 mm is investigated experimentally. typical electron beam parameters were 200 kV, 12 kA, 100 ns, few hundreds A/cm2 current density. remains less than the Child–Langmuir value, indicating that only fraction take part process. A simple statistical analysis shows more pronounced for later pulse. plasma expansion velocity and effective initial area have been calculated from...
This paper describes an in-house designed large Electron Energy Filter (EEF) utilized in the Large Volume Plasma Device (LVPD) [S. K. Mattoo, V. P. Anita, L. M. Awasthi, and G. Ravi, Rev. Sci. Instrum. 72, 3864 (2001)] to secure objectives of (a) removing presence remnant primary ionizing energetic electrons non-thermal electrons, (b) introducing a radial gradient plasma electron temperature without greatly affecting profile density, (c) providing control on scale length temperature. A set...
Hydrocarbons and nitriles are produced in Triton's stratosphere by energetic electrons from Neptune's magnetosphere other charged particle sources. Laboratory plasma experiments reported here show a substantial yield of molecules low pressure flows 10(-3) CH4 N2 appropriate to Triton if both saturated at the surface. An active similar that Uranus would result flux approximately 0.3 erg cm-2 s-1 0.1-1 MeV stratosphere; molecular production rates then 10(6)-10(8) for NH3, C2H2, HCN, NCCN; tens...
Large pulse power systems in the presence of prepulse can deliver gigawatt pulses into a matched load. While employing these for generation intense relativistic electron beams (IREBs), initiated plasma closes anode cathode gap, if gap distance is set by Child-Langmuir formula. In order to reduce effect, has been increased IREB with output parameters 400kV, 20kA, and 100ns duration. this paper without using any switch discussed.
This paper presents a theory of coupled whistler (W) and electron temperature gradient (ETG) mode using two-fluid model in high beta plasma. Non-adiabatic ion response, parallel magnetic field perturbation (δBz), perpendicular flutter (δB⊥), collisions are included the treatment theory. A linear dispersion relation for whistler-electron (W-ETG) is derived. The numerical results obtained from this compared with experimental observed large volume plasma device (LVPD) [Awasthi et al., Phys....
With the development of high-intensity and high-repetition rate laser systems, it has become crucial to be able detect characterize in real time high-energy byproducts (mainly electrons photons) laser-generated plasma. A novel multi-purpose scintillator-based electromagnetic calorimeter focused on particle photon measurements capable working a shot-by-shot basis at is being developed ELI Beamlines center. Preliminary tests this device under electron irradiation from conventional laser-driven...