A5000390042- Fusion materials and technologies
- Nuclear Materials and Properties
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Anodic Oxide Films and Nanostructures
- Concrete Corrosion and Durability
- Smart Materials for Construction
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Semiconductor materials and devices
- Corrosion Behavior and Inhibition
- Magnesium Alloys: Properties and Applications
- Metallurgical Processes and Thermodynamics
- Ion-surface interactions and analysis
- Fuel Cells and Related Materials
- Advanced materials and composites
- Electronic and Structural Properties of Oxides
- Electrodeposition and Electroless Coatings
- Hydrogen embrittlement and corrosion behaviors in metals
- Aluminum Alloys Composites Properties
- Nuclear materials and radiation effects
- Laser-Plasma Interactions and Diagnostics
- Ferroelectric and Piezoelectric Materials
- Concrete and Cement Materials Research
- Advanced battery technologies research
Guangdong Technion-Israel Institute of Technology
2019-2024
Culham Science Centre
2013-2022
United Kingdom Atomic Energy Authority
2022
Technion – Israel Institute of Technology
2019-2022
Culham Centre for Fusion Energy
2014-2020
Royal Military Academy
2020
Max Planck Society
2016
VTT Technical Research Centre of Finland
2016
Max Planck Institute for Plasma Physics
2016
University of Manchester
2010-2013
The 2014–2016 JET results are reviewed in the light of their significance for optimising ITER research plan active and non-active operation. More than 60 h plasma operation with first wall materials successfully took place since its installation 2011. New multi-machine scaling type I-ELM divertor energy flux density to is supported by principle modelling. relevant disruption experiments modelling reported a set three mitigation valves mimicking setup. Insights L–H power threshold Deuterium...
Abstract For the past several years, JET scientific programme (Pamela et al 2007 Fusion Eng. Des . 82 590) has been engaged in a multi-campaign effort, including experiments D, H and T, leading up to 2020 first with 50%/50% D–T mixtures since 1997 ever plasmas ITER mix of plasma-facing component materials. this purpose, concerted physics technology was launched view prepare campaign (DTE2). This paper addresses key elements developed by directly contributing preparation. intense preparation...
JET is used as a test bed for ITER, to investigate beryllium migration which connects the lifetime of first-wall components under erosion with tokamak safety, in relation long-term fuel retention. The (i) limiter and (ii) divertor configurations have been studied JET-ILW (JET Be first wall W divertor), compared those former JET-C carbon-based plasma-facing (PFCs)). For configuration, gross at contact point was determined situ by spectroscopy between 4% (Ein = 35 eV) more than 100%, caused...
The erosion of tungsten (W), induced by the bombardment plasma and impurity particles, determines lifetime plasma-facing components as well impacting on performance influx W into confined region. screening divertor transport in largely content core, but source strength itself has a vital impact this process. JET tokamak experiment provides access to large set erosion-determining parameters permits detailed description closest ITER one: (i) effective sputtering yields fluxes function energy...
The recent observation of possible granular superconductivity in highly oriented pyrolytic graphite (HOPG) has attracted significant research interest. Here we report a novel investigation on the structural-properties exfoliated-HOPG. We investigated two types exfoliation methods, involving either full (method-1) or partial (method-2) contact between adhesive tape and main HOPG. Structural characterization was obtained by employing X-ray diffraction (XRD), Raman spectroscopy electron...
In October 2014, JET completed a scoping study involving high power scenario development in preparation for DT along with other experiments critical ITER.These have involved intentional and unintentional melt damage both to bulk beryllium main chamber tiles divertor tiles.This paper provides an overview of the findings concern machine protection ITER, illustrating each case resolution images taken by remote handling or after removal from machine.The upper dump plate some been repeatedly...
Following the first JET ITER-like wall operations a detailed in situ photographic survey of main chamber and divertor was completed. In addition, selection tiles passive diagnostics were removed from vessel made available for post mortem analysis. From results initial analysis, conclusions regarding erosion, deposition, fuel retention material transport during limiter phases have been drawn. The rate deposition on inner outer base remote corners more than an order magnitude less preceding...
Erosion and deposition were studied in the JET divertor during first ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from tile surfaces completed by analysis samples remote areas inner cladding. total mass material deposited decreased a factor 4–9 compared carbon all-carbon operation before 2010. Deposits consist mainly beryllium with 5–20 at.% oxygen, respectively, small amounts Ni,...
Post-mortem studies with ion beam analysis, thermal desorption, and secondary mass spectrometry have been applied for investigating the long-term fuel retention in JET ITER-like wall components. The takes place via implantation co-deposition, highest values were found to correlate thickness of deposited impurity layers. From total amount retained D over half was detected divertor region. majority is on top surface inner divertor, whereas least measured main chamber mid-plane limiter....
Arsenic species are utilized as tracers in a study of pore initiation anodic films that were formed at constant potentials on aluminium phosphoric acid. The grown first sodium arsenate solution and then acid, examined using ion beam analysis scanning transmission electron microscopies. the arsenic content specimens indicates growth mechanisms incipient major pores involve mainly field-assisted dissolution flow alumina, respectively. transition between formation is suggested to be initiated...
Post mortem analyses of JET ITER-Like-Wall tiles and passive diagnostics have been completed after each the first two campaigns (ILW-1 ILW-2). They show that global fuel inventory is still dominated by co-deposition; hence plasma parameters sputtering processes affecting material migration influence distribution retained fuel. In particular, differences between results from may be attributed to a greater proportion pulses run with strike points in divertor corners, having about 300...
Abstract Results of the first dust survey in JET with ITER-Like Wall (JET-ILW) are presented. The sampling was performed using adhesive stickers from divertor tiles where greatest material deposition detected after JET-ILW campaign 2011 – 2012. emphasis especially on and analysis metal particles (Be W) aim to determine composition, size, surface topography internal structure a large set methods: high-resolution scanning transmission electron microscopy, focused ion beam, diffraction also...
The work presented draws on new analysis of components removed following the second JET ITER-like wall campaign 2013–14 concentrating upper inner divertor, and outer divertor corners, lifetime issues relating to tungsten coatings carbon fibre composite tiles dust/particulate generation. results show that remains region highest deposition in JET-ILW. Variations plasma configurations between first have altered material migration corners divertor. Net is shown be beneficial sense it reduces W...
The growth of anodic alumina in sulphuric acid is investigated at constant current on bulk and sputtering-deposited aluminium. ratio the thickness film to oxidized aluminium shown increase with density (from 0.5 50 mA cm −2 ) decrease electrolyte temperature 20 0°C). In addition, sulphur content films efficiency formation increase. It suggested that pores are generated primarily by dissolution densities below ∼2 , flow material dominating higher densities.
Results are presented for the dust survey performed at JET after second experimental campaign with ITER-Like Wall: 2013–2014. Samples were collected on adhesive stickers from several different positions in divertor both tiles and carrier. Brittle dust-forming deposits test mirrors inner wall also studied. Comprehensive characterization accomplished by a wide range of high-resolution microscopy techniques, including focused ion beam, has led to identification classes particles: (i) beryllium...
tracer is used to investigate the development of porous anodic films at constant current in phosphoric acid on electropolished aluminum. A barrier layer and region form initially with pore size related surface texture substrate. Subsequently, major pores emerge, their sizes anodizing voltage. The evolution film accompanied by increases growth rate formation efficiency. ions a preformed oxide are retained during anodization nonenriched electrolyte, being partitioned among (i)...
This paper reports on the first post-mortem analyses of tiles removed from JET after campaigns with ITER-like wall (ILW) during 2011–12 [1]. Tiles divertor have been analysed by ion beam analysis techniques and secondary mass spectrometry to determine amount beryllium deposition deuterium retention in exposed scrape-off layer. Films 10–20 μm thick were present at top tile 1, but only very thin films (< 1 μm) found shadowed areas other tiles. The total Be following ILW campaign was a factor ∼...
Erosion of plasma-facing materials and successive transport redeposition eroded material are crucial processes determining the lifetime components trapped tritium inventory in redeposited layers. deposition JET divertor were studied during second ITER-like wall campaign ILW-2 2013–2014 by using a poloidal row specially prepared marker tiles including tungsten bulk tile 5. The analyzed elastic backscattering with 3–4.5 MeV incident protons nuclear reaction analysis 0.8–4.5 3He ions before...