A5090820912- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Laser-induced spectroscopy and plasma
- Particle accelerators and beam dynamics
- Metal and Thin Film Mechanics
- Fusion materials and technologies
- Radiation Detection and Scintillator Technologies
- Ion-surface interactions and analysis
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Diamond and Carbon-based Materials Research
- Superconducting Materials and Applications
- Boron Compounds in Chemistry
- High-Temperature Coating Behaviors
- Atomic and Molecular Physics
- Ionosphere and magnetosphere dynamics
- Medical Imaging Techniques and Applications
- Cold Fusion and Nuclear Reactions
- Radiopharmaceutical Chemistry and Applications
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Plasma Applications and Diagnostics
- Geochemistry and Geologic Mapping
National Centre for Nuclear Research
2016-2025
Institut de Recherche sur la Fusion par Confinement Magnétique
2024
CEA Cadarache
2024
University of Warsaw
2024
Royal Military Academy
2020
Kurchatov Institute
2016
Institute of Plasma Physics and Laser Microfusion
2016
Poznań University of Technology
2013
Abstract The article presents the application of a low‐temperature plasma technique accomplished by controlled arc discharges in ultra‐high vacuum deposition metallic coatings on ceramic substrates. Such are very important diagnostic devices within magnetic confinement fusion facilities, especially small and medium‐sized tokamaks. molybdenum coating diamond substrate necessary for Cherenkov‐type detectors applied as runaway electron diagnosis is an example such techniques. Presented research...
This paper investigates the impact of high-energy sources, namely, plasma pulses and electron beam pulses, on materials in form layer through separate combined exposures. Experimental setups utilizing a Rod Plasma Injector (RPI) an gun were employed for irradiation tests. The studies involved pre- post-treatment analysis morphology, chemical, phase composition using scanning microscopy x-ray diffraction measurements. Surface modifications under different exposure conditions characterized,...
Abstract LaBr 3 :Ce,CeBr and GAGG:Ce scintillators were investigated the determined characteristics compared with those obtained for well-known widely used CsI:Tl NaI:Tl crystals. All detectors of same size 10 × 5 mm . The aim this test study was to single out scintillation most suitable γ-ray spectrometry emission radial profile measurements in high-temperature plasma experiments. Decay time, energy resolution, non-proportionality full peak detection efficiency ere measured energies up 1770...
In forthcoming deuterium-tritium (DT) experiments on JET a significant population of alpha-particles will be produced. For operating alpha-particle diagnostics at high DT neutron fluxes, specific improvements have to made. Proposed new detectors for gamma-ray measurements based CeBr3 and LaBr3:Ce scintillators. They are characterized by good energy resolution, relatively detection efficiency few MeV gamma-rays fast response time. An overview scintillator parameters is presented. A...
This paper presents the discussion concerning characteristics of fast deuterons which have energy above 30 keV and are recorded during high-current plasma-focus (PF) discharges, by means PM-355 plastic track-detectors placed inside ion pinhole cameras. The evoke D-D fusion reactions, mainly a beam-target mechanism. distribution magnetic field, influences trajectories deuterons, is discussed. It found that produced in various local sources their motion strongly influenced circular symmetry...
The paper concerns measurements of runaway electrons (REs) which are generated during discharges in tokamaks. control REs is an important task experimental studies within the ITER-physics program. NCBJ team proposed to study by means Cherenkov-type detectors several years ago. Cherenkov radiation, induced appropriate radiators, makes it possible identify fast electron beams and determine their spatial- temporal-characteristics. results recent REs, performed two tokamaks - COMPASS Prague FTU...
Optical emission spectroscopy techniques were used to investigate the spectra of dense deuterium-plasma jets generated by high-current pulse discharges within large PF-1000U facility and estimate parameters plasma inside their surroundings. Time-resolved optical recorded means a Mechelle®900 spectrometer. From an analysis deuterium line broadening, it was estimated that electron concentration at distance 57 cm from electrode outlets amounted (0.4–3.7) × 1017 cm−3 depending on initial gas...
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 this note we describe measurements of ion beams emitted along the z-axis DPF-1000U facility operated at 23 kV, 334 kJ, and with initial deuterium pressure 1.6–2 hPa. The device was recently renewed equipped a dynamic gas-puff valve placed inside inner electrode. investigated ions were recorded by means pinhole cameras solid state nuclear track detectors PM-355 ® (PADC) type. energy spectra determined using Thomson spectrometer on symmetry axis distance 160 cm from electrodes...
The paper presents results of experimental studies dense and high-temperature plasmas, which were produced by pulsed high-current discharges within a modernised PF-1000U facility operated at different initial gas conditions, supplied from condenser bank delivered energy about 350 kJ. investigated performed the deuterium filling under pressure 1.6–2.0 hPa, with or without an additional puffing pure (1 cm3, 0.15 MPa, instants 1.5–2 ms before main discharge initiation). For comparison also neon...
Results are presented from laboratory simulations of plasma jets emitted by young stellar objects carried out at the focus facilities. The experiments were performed three facilities: PF-3, PF-1000U and KPF-4. operation modes realized enabling formation narrow which can propagate over long distances. main parameters background determined. In order to control ratio a jet density that plasma, some special with pulsed injection working gas used.
Several series of high-current discharges were carried out within the PF-1000U facility at various gas conditions. The initial filling pressures p0 = 1.2 hPa D2, 1.06 D2 + 10% He, or 0.53 25% Ne. performed with without an additional puffing. In shots puffing, 1 cm3 (or mixture), compressed to pressure (0.13–0.20) MPa, was injected 1.5 ms before discharge initiation. Pure Ne, a mixture 50% He Ne used for optical spectroscopic measurements distance 16 27 cm from electrode outlets. Almost all...
The paper discusses a possible energy transformation that leads to the acceleration of fast ions and electrons. In plasma-focus discharges occur during deuterium filling, which have maximum current about 1 MA, accelerated deuterons produce fusion neutrons electrons hard X-ray emissions. Their total energy, is order several kilojoules, can be delivered by discharge through magnetic dynamo self-organization ordered plasma structures are formed in pinch hundreds nanoseconds implosion,...
This paper describes the structure of a higher extreme ultraviolet (XUV) emission and plasma density region which surrounds pinched dense-plasma column. It is interpreted as toroidal-like formation, flowing by closed current with poloidal toroidal components upon its surface. produces local magnetic field, separates external discharge from surface dense pinch We estimated values currents well magnetic- plasma-pressures in this column surrounding on basis measured distribution interferometric...
The impulse plasma deposition (IPD) technique is the only method of surface engineering (among plasma-based technologies) that allows a synthesis layers upon cold unheated substrate and which ensures good adhesion. This paper presents study impacts copper during IPD process. was exposed to pulsed N2/Al streams AlN layers. For plasma–material interaction diagnostics, optical emission spectroscopy used. Our results show interactions lead sputtering material. It seems obtained adhesion result...
The paper concerns fast protons and neutrons from D-D fusion reactions in a Plasma-Focus-1000U facility. Measurements were performed with nuclear-track detectors arranged “sandwiches” of an Al-foil two PM-355 separated by polyethylene-plate. eliminated all primary deuterons, but was penetrable for protons. foil first detector neutrons, which converted into recoil-protons the polyethylene recorded second detector. irradiated discharges comparable neutron-yields. Analyses etched tracks...