A5057875458- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- High-pressure geophysics and materials
- Advanced X-ray Imaging Techniques
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Energetic Materials and Combustion
- Laser Design and Applications
- Laser Material Processing Techniques
- Boron and Carbon Nanomaterials Research
- Ionosphere and magnetosphere dynamics
- Chemical Thermodynamics and Molecular Structure
- Solar and Space Plasma Dynamics
- Traumatic Ocular and Foreign Body Injuries
- Ocular and Laser Science Research
FORTH Institute of Mediterranean Studies
2023-2024
Hellenic Mediterranean University
2023-2024
Joint Institute for High Temperatures
2023
Czech Academy of Sciences, Institute of Plasma Physics
2023
Université de Bordeaux
2018-2021
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2018-2021
Centre Lasers Intenses et Applications
2018-2021
Centre National de la Recherche Scientifique
2018-2021
Donostia International Physics Center
2018-2021
University of the Basque Country
2019
Abstract X-ray phase contrast imaging (XPCI) is more sensitive to density variations than absorption radiography, which a crucial advantage when weakly-absorbing, low-Z materials, or steep gradients in matter under extreme conditions. Here, we describe the application of polychromatic laser-plasma source (duration ~0.5 ps, photon energy >1 keV) study laser-driven shock travelling plastic material. The XPCI technique allows for clear identification front as well small-scale features...
Laser–plasma interaction (LPI) at intensities $10^{15}{-}10^{16}~\text{W}\cdot \text{cm}^{-2}$ is dominated by parametric instabilities which can be responsible for a significant amount of non-collisional absorption and generate large fluxes high-energy nonthermal electrons. Such regime paramount importance inertial confinement fusion (ICF) in particular the shock ignition scheme. In this paper we report on an experiment carried out Prague Asterix Laser System (PALS) facility to investigate...
X-ray phase-contrast imaging (XPCI) is a versatile technique with applications in many fields, including fundamental physics, biology and medicine. Where absorption radiography requires high density ratios for effective imaging, the image contrast XPCI function of gradient. In this letter, we apply to study laser-driven shock waves. Our experiment was conducted at Petawatt High-Energy Laser Heavy Ion EXperiments (PHELIX) GSI. Two laser beams were used: one launch wave other generate an...
Abstract Laser–plasma interaction and hot electrons have been characterized in detail laser irradiation conditions relevant for direct-drive inertial confinement fusion. The experiment was carried out at the Gekko XII facility multibeam planar target geometry an intensity of approximately $3\times {10}^{15}$ W/cm 2 . Experimental data suggest that high-energy electrons, with temperatures 20–50 keV conversion efficiencies $\eta <1\%$ , were mainly produced by damping electron plasma waves...
Abstract We introduce a novel, gaseous target optical shaping laser set-up, capable to generate short scale length, near-critical profiles via generated colliding blast waves. These are maintain their compressed density for several nanoseconds, being therefore ideal laser-plasma particle acceleration experiments in the near critical plasma regime. Our proposed method overcomes laser-target synchronization limitations and delivers energetic protons, during temporal evolution of optically...
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.
Parametric instabilities at laser intensities in the range (2–6) × 1015 W/cm2 (438 nm, 250 ps, 100–300 J) have been investigated planar geometry Prague Asterix Laser System facility via calorimetry and spectroscopy. The density scalelength of plasma was varied by using an auxiliary pulse to form a preplasma before arrival main beam changing delay between two pulses. Experimental data show that Stimulated Brillouin Scattering (SBS) is more effective than Raman (SRS) degrading laser-plasma...
Abstract We report results and modelling of an experiment performed at the Target Area West Vulcan laser facility, aimed investigating laser–plasma interaction in conditions that are interest for shock ignition scheme inertial confinement fusion (ICF), is, intensity higher than ${10}^{16}$ $\mathrm{W}/{\mathrm{cm}}^2$ impinging on a hot ( $T>1$ keV), inhomogeneous long scalelength pre-formed plasma. Measurements show significant stimulated Raman scattering (SRS) backscattering $\sim...
We present the results of an experiment on laser-driven shock waves performed at Prague Asterix Laser system (PALS), where fundamental frequency laser (1315 nm) is used to launch a strong in planar geometry. The aims characterize both and hot electrons generated intensities ≃1016 W/cm2. It shown that, these interaction conditions, hydrodynamics strongly impacted by noncollisional mechanisms, role electrons, parametric instabilities, essential determining dynamics.
In an experiment carried out at the Prague Asterix Laser System laser intensities relevant to shock ignition conditions (I &gt; 1016 W/cm2), heating and transport of hot electrons were studied by using several complementary diagnostics, i.e., Kα time-resolved imaging, hard x-ray filtering (a bremsstrahlung cannon), electron spectroscopy. Ablators with differing composition from low Z (parylene N) high (nickel) used in multilayer planar targets produce plasmas different coronal...
Abstract In this work we present experimental results on the behavior of diamond at megabar pressure. The experiment was performed using PHELIX facility GSI in Germany to launch a planar shock into solid multi-layered samples. target design allows velocity and two metal layers be measured as well free surface after breakout. As diagnostics, used interferometry systems for any reflector (VISARs). Our measurements show that pressures obtained (between 3 9 Mbar), propagation induces reflecting...
Shock Ignition is a two-step scheme to reach Inertial Confinement Fusion, where the precompressed fuel capsule ignited by strong shock driven laser pulse at an intensity in order of [Formula: see text] W/cm[Formula: text]. In this report we describe results experiment carried out PALS facility designed investigate origin hot electrons laser-plasma interaction intensities and plasma temperatures expected for Ignition. A detailed time- spectrally-resolved characterization Stimulated Raman...
The development of new diagnostics is important to improve the interpretation experiments. Often well-known physical processes and techniques originally developed in unrelated fields science can be applied a different area with significant impact on quality produced data. X-ray phase-contrast imaging (XPCI) one which has found many applications biology medicine. This due its capability emphasise presence strong density variations normally oriented respect propagation direction. With...
Abstract This paper provides a summary of recent research connected with the shock ignition (SI) concept inertial confinement fusion which was carried out at PALS. In experiments, Cu planar targets coated thin CH layer were used. Two-beam irradiation experiment applied to investigate effect preliminary produced plasma shock-wave generation. The 1ω or 3ω main beam high intensity >10 15 W/cm 2 generates wave, while other below 10 14 creates pre-plasma simulating pre-compressed related SI....
Abstract Blast waves have been produced in solid target by irradiation with short-pulse high-intensity lasers. The mechanism of production relies on energy deposition from the hot electrons laser–matter interaction, producing a steep temperature gradient inside target. Hot also produce preheating material ahead blast wave and expansion rear side, which results complex propagation dynamic. Several diagnostics used to characterize electron source, induced velocity wave. Results are compared...
Laser WakeField Acceleration (LWFA) is extensively used as a high-energy electron source, with electrons achieving energies up to the GeV level. The produced beam characteristics depend strongly on gas density profile. When gaseous target jet, profile affected by parameters, such nozzle geometry, used, and backing pressure applied valve. An source based LWFA mechanism has recently been developed at Institute of Plasma Physics Lasers. To improve controllability over we set 3D-printed nozzles...
In this work, we present experimental results on the behavior of liquid water at megabar pressure. The experiment was performed using HIPER (High-Intensity Plasma Experimental Research) laser facility, a uniaxial irradiation chamber GEKKO XII (GXII) Institute Laser Engineering (ILE), and PHELIX GSI (GSI Helmholtz Centre for Heavy Ion Research), single-beam high-power to launch planar shock into solid multilayered samples. Equation-of-state data (H 2 O are obtained in pressure range 0.50–4.6...
Abstract Shock Ignition is a two-step scheme to reach Inertial Confinement Fusion, where the precompressed fuel capsule ignited by strong shock driven an intense laser pulse at intensity ∼ 10 16 W/cm 2 . In this report we detail results of experiment designed investigate origin hot electrons (HE) in laser-plasma interaction intensities and plasma temperatures expected for Ignition. A detailed time- spectrally-resolved characterization Stimulated Raman Scattering (SRS) Two Plasmon Decay (TPD)...
First Page
The work is dedicated to the investigation of a hot electron generation in shock ignition relevant experiment by means x-ray time-resolved diagnostics. Nowadays, approach one most promising methods realize inertial confinement fusion and achieve new energetic source world. mechanisms have crucial role this case are insufficiently investigated due short temporal scales close laser pulse time. Here we report about time resolved study phenomenon applying imager based on spherically-bent Bragg...