A5088561354- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Nuclear Physics and Applications
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Magnetic confinement fusion research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Cold Fusion and Nuclear Reactions
- Ion-surface interactions and analysis
- Vacuum and Plasma Arcs
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Fusion materials and technologies
- Advanced Fluorescence Microscopy Techniques
- Quantum, superfluid, helium dynamics
- Plasma Applications and Diagnostics
- Advanced Optical Sensing Technologies
Institute of Plasma Physics and Laser Microfusion
2011-2018
Czech Academy of Sciences, Institute of Plasma Physics
2017-2018
Czech Academy of Sciences
2017-2018
Czech Academy of Sciences, Institute of Physics
2017-2018
Czech Technical University in Prague
2017-2018
Moscow Engineering Physics Institute
2017
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2017
Queen's University Belfast
2017
Warsaw University of Technology
2017
Palo Alto Veterans Institute for Research
2012
An experiment was performed using the PALS laser to study laser-target coupling and laser-plasma interaction in an intensity regime ≤1016 W/cm2, relevant for “shock ignition” approach Inertial Confinement Fusion. A first beam at low used create extended preformed plasma, a second one strong shock. Pressures up 90 Megabars were inferred. Our results show importance of details energy transport overdense region.
Generating pure proton beams using lasers for novel cancer therapies has long challenged researchers. In a new experiment, scientists irradiate thin hydrogen ribbon with high-power laser to generate large and population of protons.
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...
In this paper, the possible evolution of a pinched plasma column is presented from results temporally resolved measurements using magnetic probe, interferometry and neutron diagnostics performed on focus PF-1000 device with deuterium as filling gas. Together discharge axial current about 1.5 MA toroidal component order 100 kA was estimated in toroidal, helical plasmoidal structures formed within dense column. The mass inside these increases due to injection neighborhood regions higher...
Abstract The paper is directed to the study of high-temperature plasma and ablation formation as well efficiency laser energy transfer solid targets irradiated by pulses with intensities 1–50 PW/cm 2 duration 200–300 ps, i.e., at conditions corresponding characteristics spike designed generate igniting shock wave in ignition concept. experiments have been performed Prague Asterix Laser System. iodine delivered 250 ps (full width half maximum) range 100–600 J first (λ 1 = 1.315 µm) third 3...
The electromagnetic pulses (EMPs) generated during the interaction of a focused 1.315-μm sub-nanosecond laser pulse with solid hydrogen ribbon were measured. strength and temporal characteristics EMPs found to be dependent on target density. If low density is ionized laser, plasma does not physically touch holder, EMP weaker in shorter time duration. It shown that H2 experiment, strongly affect response fast electronic devices. measurements carried out by Rohde&Schwarz B-Probes,...
This paper describes the results of a series experiments conducted with PALS laser at intensities interest for shock ignition approach to inertial fusion.In particular, we addressed generation hot electrons (HE) (determining their average energy and number), as well parametric instabilities which are producing them.In addition, studied impact HE on formation dynamics strong shocks.
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...
In this paper the results of temporally resolved measurements using calibrated azimuthal and axial magnetic probes are presented, together with interferometry neutron diagnostics performed on PF-1000 (IPPLM, Warsaw, 2 MA) device a deuterium filling 1011 yield. The located in anode front at three different radial positions allow determination dominant part discharge current flows behind imploding dense plasma layer. sheath is composed both components field. After reaching minimum diameter,...
The first space-time resolved spontaneous magnetic field (SMF) measurements realized on Prague Asterix Laser System are presented. SMF was generated as a result of single laser beam (1.315 μm) interaction with massive planar targets made materials various atomic numbers (plastic and Cu). Measured confirmed azimuthal geometry their maximum amplitude reached the value 10 MG at energy 250 J for both target materials. It demonstrated that spatial distributions these fields associated character...
A comparative study of photoionized plasmas created by two soft X-ray and extreme ultraviolet (SXR/EUV) laser plasma sources with different parameters is presented. The are based on double-stream Xe/He gas-puff targets irradiated high (500 J/0.3 ns) low energy (10 J/1 pulses. In both cases, the SXR/EUV beam gas stream, injected into a vacuum chamber synchronously radiation pulse. Irradiation gases resulted in formation emitting range. measured Ne spectra dominated emission lines...
Plasma focus experiments were carried out at a modified PF-1000 where the cathode disc was added in front of anode. Experimental results indicated fraction thermonuclear neutrons on mega-ampere current level. In order to prove mechanism, time neutron production and energy spectrum measured by time-of-flight (TOF) diagnostics. Neutron TOF signals showed that multiphase process more than one mechanism occurred simultaneously. The occurrence most evident during plasma stagnation low deuterium...
The PF-1000 plasma focus was modified by adding the cathode disk 3 cm in front of anode. This modification facilitated evaluation neutron energy spectra. Two pulses were distinguishable. As regards first pulse, it lasted 40 ns during stagnation and demonstrated high isotropy emission. A peak detected upstream 2.46±0.02 MeV. full width spectra 90±20 keV enabled to calculate an ion temperature 1.2 keV. These parameters a yield 109 corresponded theoretical predictions for thermonuclear neutrons.
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation T. Pisarczyk, S. Yu. Gus'kov, Z. Kalinowska, J. Badziak, D. Batani, L. Antonelli, G. Folpini, Y. Maheut, F. Baffigi, Borodziuk, Chodukowski, Cristoforetti, N. Demchenko, A. Gizzi, Kasperczuk, P. Koester, E. Krousky, Labate, Parys, M. Pfeifer, O. Renner, Smid, Rosinski, Skala, R. Dudzak, Ullschmied, Pisarczyk;...
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,...
Abstract This paper reports on properties of a plasma formed by sequential action two laser beams flat target, simulating the conditions shock-ignited inertial confinement fusion target exposure. The experiments were performed using planar targets consisting massive copper (Cu) plate coated with thin plastic (CH) layer, which was irradiated 1ω PALS beam ( λ = 1.315 μm) at energy 250 J. intensity fixed-energy scaled varying focal spot radius. To imitate shock ignition conditions,...
A system of precise pulse synchronization between a single-shot large-scale laser exploiting an acousto-optical modulator and femtosecond high repetition rate is reported in this article. This opto-electronical has been developed for the sub-nanosecond kJ-class iodine photodissociation (Prague Asterix Laser System—PALS) with 25-TW Ti:sapphire (Ti:Sa) operating at 1 kHz or 10 Hz depending on required energy level output pulses. At regime, single duration about 45 fs small less than mJ are...
By the use of various experimental techniques, it is shown that relativistic electrons, MeV protons, and deuterons are emitted from a 500-μm thick (CD2)n target exposed to Iλ2 ≈ 5 × 1016 W cm–2 μm2, which delivered by iodine photodissociation laser Prague Asterix Laser System. A parameter reflecting laser-power efficiency proton acceleration used for comparison observed maximum energy with data other experiments. The number protons constituting backward forward jets estimated. Values...
This paper presents the results of research on interactions pulsed plasma streams, as generated by PF-1000 facility, with solid targets made tungsten or carbon fibre composite. The device was equipped a modified inner electrode central insert 50 mm in diameter. experimental chamber filled pure deuterium at p0 = 1.47 hPa. At charging voltage U0 24 kV, maximum current amounted to 1.8 MA about 5.5 μs after discharge initiation. investigated were located z-axis, distance 9 cm from end. For...
Abstract In our earlier papers, we demonstrated that plasma pressure decreases with the growing atomic number of target material. That experimentally confirmed fact brought about a question whether it would be possible to collimate Al outflow by using plastic as compressor. To prove idea used in next experiments an cylindrical insert 400 µm diameter. The measurements were carried out at Prague Asterix Laser System iodine laser facility. provided 250 ps (full width half maximum (FWHM)) pulse...
The PF-1000 plasma-focus (PF) facility equipped with Mather-type coaxial electrodes was modified by the addition of a cathode disk in front anode plate, at distance 3 cm and covering hole center. In comparison earlier electrode setup, important differences as regards neutron, X-ray, interferometric diagnostics were observed for this special configuration. total current during pinch phase increased on average about 25%, neutron yield decreased to 20-30%, velocity transformation structures...
Shock ignition (SI) is a new approach to Inertial Confinement Fusion (ICF) based on decoupling the compression and phase. The last one relies launching strong shock through high intensity laser spike (≤ 1016 W/cm2) at end of compression. In this paper, first we described an experiment performed using PALS iodine study laser-target coupling laser-plasma interaction in regime relevant for SI. A beam with wavelength λ = 1.33 μm low was used create extended preformed plasma, second 0.44 shock....
Abstract The effect of laser intensity on characteristics the plasma ablated from a low- Z (CH) planar target irradiated by 250 ps, 0.438 µm pulse with up to 10 16 W/cm 2 as well parameters laser-driven shock generated in for various scale-lengths preformed was investigated at kilojoule Prague Asterix Laser System (PALS) facility. Characteristics were measured use 3-frame interferometry, ion diagnostics, an X-ray spectrometer, and K α imaging. Parameters Cl doped CH intense 3ω inferred...
Abstract The paper is a continuation of research carried out at Prague Asterix Laser System (PALS) related to the shock ignition (SI) approach in inertial fusion, which was with use 1ω main laser beam as generating wave. Two-layer targets were used, consisting Cu massive planar target coated thin polyethylene layer, which, case two-beam irradiation geometry, simulate conditions SI scenario. investigations presented this are relat e d 3ω create ablation pressure for high-power wave...
In this work, photoionized plasmas were created by irradiation of gaseous argon with soft x-ray (SXR) and extreme ultraviolet (EUV) intense radiation pulses. Two different laser-produced plasma sources, employing a low energy Nd:YAG laser high iodine system (PALS), used for creation plasmas. both cases the EUV or SXR beam irradiated Ar stream, injected into vacuum chamber synchronously pulse. Emission spectra, measured indicated strong differences in ionization degree produced using systems....