A5080684213- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Laser-Plasma Interactions and Diagnostics
- High-Energy Particle Collisions Research
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- High-pressure geophysics and materials
- Black Holes and Theoretical Physics
- Laser Design and Applications
- Particle Accelerators and Free-Electron Lasers
- Theology and Canon Law Studies
- Pulsed Power Technology Applications
- Polish Historical and Cultural Studies
- Polish Law and Legal System
- Particle accelerators and beam dynamics
- Optical Systems and Laser Technology
- Neutrino Physics Research
- Polish Legal and Social Issues
- Spectroscopy and Quantum Chemical Studies
- Health, Work, and Social Studies in Poland
- Ocular and Laser Science Research
- Physics of Superconductivity and Magnetism
- Ion-surface interactions and analysis
- Planetary Science and Exploration
- Astrophysics and Cosmic Phenomena
University of Oxford
2023
Institute of Plasma Physics and Laser Microfusion
2012-2021
Nicolaus Copernicus University
2019-2020
University of Warsaw
1986-2007
Durham University
1998
Argonne National Laboratory
1995
Center for Theoretical Physics
1991
Institute of Geophysics
1991
The Abdus Salam International Centre for Theoretical Physics (ICTP)
1982-1990
Scuola Internazionale Superiore di Studi Avanzati
1987-1989
This paper provides an up-to-date review of the problems related to generation, detection and mitigation strong electromagnetic pulses created in interaction high-power, high-energy laser with different types solid targets. It includes new experimental data obtained independently at several international laboratories. The mechanisms field generation are analyzed considered as a function intensity spectral range emissions they produce. major emphasis is put on GHz frequency domain, which most...
High power lasers have proven being capable to produce high energy gamma rays, charged particles and neutrons induce all kinds of nuclear reactions. At ELI, the studies with will enter for first time into new domains intensities.
Acceleration of dense matter to high velocities is importance for energy density physics, inertial confinement fusion, or space research. The acceleration schemes employed so far are capable accelerating microprojectiles approaching 1000 km/s; however, the energetic efficiency low. Here, we propose and demonstrate a highly efficient scheme in which projectile placed cavity irradiated by laser beam introduced into through hole then accelerated guiding channel pressure hot plasma produced...
Shock ignition (SI) is an appealing approach in the inertial confinement scenario for and burn of a pre-compressed fusion pellet. In this scheme, strong converging shock launched by laser irradiation at intensity Iλ2 > 1015 W cm−2 µm2 end compression phase. regime, laser–plasma interactions are characterized onset variety instabilities, including stimulated Raman scattering, Brillouin scattering two plasmon decay, accompanied generation population fast electrons. The effect electrons on...
Wetted-foam layers are of significant interest for inertial-confinement-fusion capsules, due to the control they provide over convergence ratio implosion and opportunity this affords minimize hydrodynamic instability growth. However, equation state fusion-relevant foams not well characterized, many simulations rely on modeling such as a homogeneous medium with foam average density. To address issue, an experiment was performed using VULCAN Nd:glass laser at Central Laser Facility. The aim...
The targets that are used to produce high-energy protons with ultra-high intensity lasers generate a strong electromagnetic pulse (EMP). To mitigate undesired side effect, we developed and tested concept called the "birdhouse." It consists in confining EMP field finite volume dissipating trapped energy an electric resistor. A prototype was at 10 TW 50 fs laser facility. recorded average mitigation ratio is about 20 for frequencies from 100 MHz 6 GHz. attains level of frequency range 1-2 GHz...
Abstract Measurements had been performed of strong electromagnetic pulses (EMPs) generated as a result laser–target interaction at the sub-ns kJ-class Prague Asterix Laser System facility. Two conductive Prodyn FD5C D-dot pencil probes were used. inside experimental chamber and outside in large window 40 cm diameter setup that guaranteed 6 GHz bandwidth. A very good signal-to-noise ratio (17:1) was obtained after some steps taken to ensure proper EMP shielding data collection setup. The...
Results of particle-in-cell (PIC) simulations fast ion generation in the recently proposed laser-induced cavity pressure acceleration (LICPA) scheme which a picosecond circularly polarized laser pulse intensity ∼1021 W/cm2 irradiates carbon target placed are presented. It is shown that due to circulation cavity, laser-ions energy conversion efficiency LICPA more than twice as high for conventional (without cavity) radiation and quasi-monoenergetic beam mean ∼0.5 GeV fluence GJ/cm2 produced...
Abstract Measurements are reported of the target neutralization current, charge, and tangential component magnetic field generated as a result laser–target interaction by pulses with energy in range 45–92 mJ on pulse duration from 39 to 1000 fs. The experiment was performed at Eclipse facility CELIA, Bordeaux. aim extend investigations for thick (mm scale) targets case thin (μm thickness) way that would allow straightforward comparison results. We found foil tend generate 20–50% higher...
Among various methods for the acceleration of dense plasmas mechanism called laser-induced cavity pressure (LICPA) is capable achieving highest energetic efficiency. In LICPA scheme, a projectile placed in accelerated along guiding channel by thermal plasma or radiation an intense laser trapped cavity. This arrangement leads to significant enhancement hydrodynamic electromagnetic forces driving projectile, relative standard schemes. The aim this paper review recent experimental and numerical...
The next-next-to-leading order QCD corrections to ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadrons are considered. stability of the predictions with respect change renormalization scheme is discussed in detail for case five, four, and three active quark flavors. analysis based on recently proposed condition selecting schemes according degree cancellation that they introduce expression scheme-invariant combination expansion coefficients. It demonstrated dependence ambiguity obtained...
The problem of summation the perturbation expansion in QCD is discussed. It argued that this summable by a modified Borel method. corrections to semileptonic width heavy lepton are considered as an example. possible differences between predictions from resummed and truncated illustrated. shown use Borel-type approximant may eliminate certain discrepancy theoretical prediction for $\ensuremath{\tau}$ experiment.
Results are reported on a direct measurement of the electric field strong electromagnetic pulse generated through laser interaction with thick solid target inside an experimental chamber 10 TW femtosecond laser. Two Prodyn FD5C conductive D-dot probes were used to demonstrate that signal-to-noise ratio in this arrangement is 10:1 and sensitive component parallel their axis. Maximum value order 18 kV/m was obtained for 50 fs 270 mJ energy target. To ascertain correct estimate recorded fields...
We report the experiment conducted on Prague Asterix Laser System (PALS) laser facility dedicated to make a parametric study of laser–plasma interaction under physical conditions corresponding shock ignition thermonuclear fusion reactions. Two beams have been used: auxiliary beam, for preplasma creation surface plastic foil, and main beam launch strong shock. The ablation pressure is inferred from volume crater in Cu layer situated behind foil by breakout chronometry. population fast...
Abstract In this paper, a new method for efficient generation of high-energy ion bunches via laser-induced cavity pressure acceleration (LICPA) is examined using one-dimensional particle-in-cell code PIC1D. It found that high laser beam intensities the order 10 22 W/cm 2 and circular light polarization, substantial increase in parameters accelerated ions obtained when target placed inside special cavity, into which introduced by small hole. As compared to pure radiation scheme, LICPA scheme...
The perturbative QCD corrections to the semileptonic decay width of \ensuremath{\tau} lepton are analyzed in various renormalization schemes. Significant differences found between a priori admissible schemes, which indicates that it is impossible use these obtain precise determination scale parameter \ensuremath{\Lambda}.
The problem of renormalization scheme and gauge dependence perturbative QCD predictions in the momentum subtraction schemes is considered. A renormalization-group-improved expression for contribution to $\frac{{\ensuremath{\sigma}}_{T}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons})}{\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})}$ ratio discussed detail next-to-next-to-leading order....
It is well known that the laser-target interaction at high power and laser intensity may result in emission of strong electromagnetic pulses with frequencies range from tens MHz to a few GHz duration hundreds nanoseconds.It was recently pointed out electric polarization target resulting neutralization current play an important role emission.The charge generated 30 fs several ps were studied detail Eclipse facility CELIA, Bordeaux, pulse energy level up 100 mJ on target.In this contribution...
Laser-induced cavity pressure acceleration (LICPA) is a novel scheme of dense matter having potential to accelerate plasma projectiles with the energetic efficiency much higher than achieved so far other methods. In this scheme, projectile placed in irradiated by laser beam introduced into through hole and accelerated along guiding channel thermal created laser-produced or photon ultraintense radiation trapped cavity. This paper summarizes briefly main results our recent LICPA studies,...