A5062101361- Fusion materials and technologies
- Metal and Thin Film Mechanics
- Nuclear Materials and Properties
- Laser-induced spectroscopy and plasma
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Diamond and Carbon-based Materials Research
- High-pressure geophysics and materials
- Laser-Ablation Synthesis of Nanoparticles
- Electrochemical sensors and biosensors
- Space Satellite Systems and Control
- Ion-surface interactions and analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Laser Material Processing Techniques
- Nanomaterials for catalytic reactions
- Conducting polymers and applications
- Vacuum and Plasma Arcs
- High-Temperature Coating Behaviors
- High voltage insulation and dielectric phenomena
- Building materials and conservation
- Iron oxide chemistry and applications
- Metallic Glasses and Amorphous Alloys
- Microstructure and Mechanical Properties of Steels
National Institute for Laser Plasma and Radiation Physics
2017-2024
University of Bucharest
2017-2020
This work is focused on the structural and morphological investigations of polyaniline poly(o-anisidine) polymers generated in a direct current glow discharge plasma, vapors monomers, without buffer gas, using an oblique angle-positioned substrate configuration. By atomic force microscopy scanning electron we identified formation worm-like interlinked structures surface layers, layers being compact bulk. The are flat with no kind their surfaces. Fourier transform infrared spectroscopy main...
The provision of a particle and power exhaust solution which is compatible with first-wall components edge-plasma conditions key area present-day fusion research mandatory for successful operation ITER DEMO. work package plasma-facing (WP PFC) within the European programme complements laboratory experiments, i.e. in linear plasma devices, electron ion beam loading facilities, studies performed toroidally confined magnetic such as JET, ASDEX Upgrade, WEST etc. connection both groups done via...
(1) Background: A comparative research study to remove Congo Red (CR) and Methyl Orange (MO) from single binary solutions by adsorption onto cobalt ferrite (CoFe2O4) ferrite–chitosan composite (CoFe2O4-Chit) prepared a simple coprecipitation method has been performed. (2) Methods: Structural, textural, morphology, magnetic properties of the obtained materials were examined X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, N2 adsorption–desorption analysis, Scanning...
Abstract The Joint European Torus (JET) fusion reactor was upgraded to the metallic wall configuration in 2011 which consisted of bulk beryllium (Be) tiles main chamber and tungsten (W) W-coated CFC divertor (Matthews G.F. et al Phys. Scr. T148 014001). During each campaign, a series damages were observed; on upper dump plates (UDP) positioned top part vessel walls inner wall—mainly affecting guard limiters (IWGL). In both cases, it concluded that causes these unmitigated plasma disruptions....
Chitosan–hydroxyapatite composite layers were deposited on Si substrates in radio frequency magnetron sputtering discharges. The plasma parameters calculated from the current–voltage frequency-compensated Langmuir probe characteristics indicate a huge difference between electron temperature and at sample holder. These findings aid understanding of coagulation pattern hydroxyapatite–chitosan macromolecules substrate surface. An increase sizes spherical-shape grain-like structures formed...
Cleaning techniques for metallic first mirrors are needed in more than 20 optical diagnostic systems from ITER to avoid reflectivity losses. Plasma sputtering is considered as one of the most promising remove deposits coming main wall (mainly beryllium and tungsten). Previous plasma cleaning studies were conducted on contaminated with tungsten where argon and/or helium employed process gas, demonstrating removal contamination recovery properties. Still, both above-mentioned gases have a...
Iron-oxide-doped polyaniline (PANI-IO) thin films were obtained by the polymerization of aniline monomers and iron oxide solutions in direct current glow discharge plasma absence a buffer gas for first time. The PANI-IO deposited on optical polished Si wafers order to study surface morphology evaluate their vitro biocompatibility. characterization coatings was accomplished using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), atomic force (AFM),...
We show that a spectral distribution of laser-accelerated protons can be extracted by analyzing the proton track diameters observed on front side second CR-39 detector arranged in stack. The correspondence between diameter and incident energy is established knowing with energies only higher than 10.5 MeV fully deposit their detector. correlation stack also presented. By calculating number stopped stack, we find out its dependence 1–15 range presents some discontinuities at 9 MeV. Thus, build...
A research study was conducted to establish the effect of presence sodium bis-2-ethyl-hexyl-sulfosuccinate (DOSS) surfactant on size, shape, and magnetic properties cobalt ferrite nanoparticles, also their ability remove anionic dyes from synthetic aqueous solutions. The molar ratio (1:0.1; 1:0.25 1:0.5) physicochemical prepared particles evaluated using different characterization techniques, such as FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM),...
Abstract The knowledge of optical properties beryllium is crucial importance in fields such as nuclear fusion and aerospace applications. pure are known the visible infrared domains. Nevertheless, role different physico-chemical parameters composition surface roughness, that often neglected first approximation, deserves dedicated comprehensive studies. In this work we have studied bulk magnetron sputtering layers 500–2000 nm spectral range. Experimental measurements show reflectivity...
Autonomous smart natural ventilation systems (SVS) attached to the glass façade of living quarters and office buildings can help reducing carbon footprint city in future, especially during warm seasons represent an alternative conventional mechanical systems. The work performed this manuscript focuses on investigation bacteria trapping killing efficiency stainless steel grids coated with a mixed layer Cu-Ag. These are be employed as decontamination filters for prototype that we currently...
An adequate simulation model has been used for the calculation of angular and energy distributions electrons, protons, photons emitted during a high-power laser, 5-µm thick Ag target interaction. Their spectra fluencies have calculated between 0 360 degrees around interaction point with step angle five degrees. Thus, contribution each ionizing species to total fluency value established. Considering geometry experimental set-up, map radiation dose inside vacuum chamber simulated, using Geant4...
Beryllium-deuterium co-deposited layers were obtained using DC magnetron sputtering technique by varying the Ar/D2 gas mixture composition (10/1; 5/1; 2/1 and 1:1) at a constant deposition rate of 0.06 nm/s, 343 K substrate temperature 2 Pa pressure. The surface morphology was analyzed Scanning Electron Microscopy layer crystalline structure X-ray diffraction. Rutherford backscattering spectrometry employed to determine chemical layers. D trapping states inventory quantification performed...
Formation of Be-W mixed layers in thermonuclear fusion reactors can potentially alter the retention hydrogen isotopes and affect release properties these isotopes. This paper reports on characteristics D from reference Be, W as well three with well-defined atomic concentrations (2:1, 1:1, 1:2). The resulted sputtering Be materials Ar:D (1:1) mixture at 2 Pa using DC magnetron sputtering. layers’ deposition parameters were varied to adjust accordingly rate for each material order obtain...
Deuterium retention and release behavior were investigated in this study, for thin layers of beryllium, tungsten mixed beryllium/tungsten which are concern next-generation thermonuclear fusion devices like International Thermonuclear Experimental Reactor. The resulted from deposition with Thermionic Vacuum Arc technology by using two different ion acceleration voltages 0 V -700 respectively subsequently implanted exposure to a steady-state deuterium plasma energies 240 eV/D D3 360 D2 at...
In the nuclear industry, coated cladding is a topical problem and it chosen as near-term most promising ATF (Accident-Tolerant Fuel) concept. The main objective of this concept to enhance accident tolerance power plants accordingly, performance expected be improved. This work assesses corrosion Zircalloy-4 alloy with thin chromium coating by MS (magnetron sputtering), tested under CANDU (CANada Deuterium Uranium) reactor primary circuit simulated condition (LiOH solution, 10 MPa, 310 °C, pH...
Our contribution represents the study of deuterium thermal release from beryllium and oxide substrates implanted by an ion plasma torch at different loads two temperatures. The Be Bulk samples (12x15 cm) were processed to obtain best possible implantation surface. subsequently exposure a steady state D using 240 eV/D low flux 5.6×1017m-2s. Scanning electron microscopy measurements performed after sample irradiation revealed apparition grain-like structures due plasma-facing on Be. Also,...
The nuclear industry is focusing some efforts on increasing the operational safety of current reactors and improving future types reactors. In this context, paper focused testing evaluating corrosion behavior a thin chromium coating, deposited by Electron Beam Physical Vapor Deposition Zy-4. After autoclaving under primary circuit conditions, Cr-coated Zy-4 samples were characterized gravimetric analysis, optical microscopy, SEM with EDX, XRD. investigation was carried out applying three...