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showing 10 items of 44654 documents

Development, Characterization, and Testing of a SiC-Based Material for Flow Channel Inserts in High-Temperature DCLL Blankets

2018

This work has been carried out within the framework of the EUROfusion Consortium. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

010302 applied physicsNuclear and High Energy PhysicsMaterials scienceFabricationelectrical conductivityBlanketCondensed Matter Physics01 natural sciencesTemperature measurement010305 fluids & plasmasCorrosionchemistry.chemical_compoundThermal conductivitydual-coolant lead-lithium (DCLL) blanketFlexural strengthchemistryCorrosion by PbLi0103 physical sciencesThermalSilicon carbide:NATURAL SCIENCES:Physics [Research Subject Categories]flow channel insert (FCI)thermal conductivityComposite materialporous SiCIEEE Transactions on Plasma Science
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Accumulation of radiation defects and modification of micromechanical properties under MgO crystal irradiation with swift 132Xe ions

2020

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. A.A. also acknowledges support via the project GF AP05134257 of Ministry of Education and Science of the Republic of Kazakhstan .

010302 applied physicsNuclear and High Energy PhysicsMaterials scienceOptical absorptionAnalytical chemistryDepth profile of hardeningCathodoluminescence02 engineering and technologyRadiation021001 nanoscience & nanotechnologySwift heavy ions01 natural sciencesFluenceRadiation defectsSpectral lineIonCrystalFluence dependenceIonization0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Irradiation0210 nano-technologyInstrumentationMagnesium oxideNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Depth profiles of damage creation and hardening in MgO irradiated with GeV heavy ions

2019

This work has been performed within the framework of the EUROfusion Enabling Research project: ENR-MFE19.ISSP-UL-02 “Advanced experimental and theoretical analysis of defect evolution and structural disordering in optical and dielectric materials for fusion applications”. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

010302 applied physicsNuclear and High Energy PhysicsPhotoluminescenceMaterials scienceDislocations02 engineering and technologyNanoindentation021001 nanoscience & nanotechnologySwift heavy ions01 natural sciencesMgO crystalsNanoindentationIonCondensed Matter::Materials ScienceIndentation0103 physical sciencesHardening (metallurgy):NATURAL SCIENCES:Physics [Research Subject Categories]IrradiationComposite materialDislocation0210 nano-technologySpectroscopyInstrumentationPhotoluminescenceNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Critical issues in the PD testing methodology for XLPE-insulated MV cables: An experimental case

2017

This paper describes some critical issues arising during the partial discharge (PD) testing of a 500m delivery length of an XLPE-insulated MV cable. At first, conventional PD measurements were performed on the whole length by using a standard acquisition system; PDs activity was detected, but the system allowed the operator to localize the PDs only on a length of 70 m. A visual inspection of this section highlighted the presence of an excoriation in the outer sheet. Aiming at a more accurate pin-pointing of the defect, more measurements were carried out in the proximity of the outer defect using a portable PD detection system. These measurements showed PDs activity, whose source was located…

010302 applied physicsOperator (computer programming)Cables Cable testing MV cables Partial Discharges Partial Discharge Measurements Partial Discharge testing PD detection Wireless PD detection XLPE-insulated cablesSection (archaeology)Computer scienceAcoustics0103 physical sciencesExcoriationPartial discharge01 natural sciences2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)
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Marginal and internal fit evaluation of conventional metal-ceramic versus zirconia CAD/CAM crowns

2019

Background The purpose of this in vivo study was to compare the marginal and internal gap widths of monolithic zirconia crowns fabricated by CAD/CAM technique and metal-ceramic crowns fabricated by conventional technique. Material and methods 10 participants needing a single restoration were selected. Zirconia crowns using CAD/CAM technology (Group A) (n=10) and metal-ceramic crowns (Group B) (n=10) using lost wax casting technique were fabricated for each selected tooth. The marginal and internal gaps of crowns were recorded using a replica technique with light body silicone material stabilized with a regular set putty. Each replica was sectioned buccolingually and mesiodistally and then e…

010302 applied physicsOrthodonticsProsthetic DentistryMaterials scienceResearchMonolithic zirconiaCAD02 engineering and technology:CIENCIAS MÉDICAS [UNESCO]021001 nanoscience & nanotechnology01 natural sciencesMetal ceramicPaired samplesUNESCO::CIENCIAS MÉDICAS0103 physical sciencesStereo microscopeCubic zirconia0210 nano-technologyGeneral DentistryConventional techniqueJournal of Clinical and Experimental Dentistry
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Domain Walls Motions in Barium Titanate Ceramics

1996

The shear modulus and mechanical loss at low frequencies (0.01, 0.3, 1 Hz) are measured by an inverted pendulum for BaTiO 3 ceramic with large grain sizes. The permittivity and dielectric losses are also investigated for the same material at higher frequencies between 1 and 100 kHz as function of temperature. Those results show several relaxation peaks in the ferroelectric phases. The activation energy of each peak is obtained to be 0.29, 0.45, 0.68, 0.92 eV. The influences of strain amplitude and thermal treatments are studied specially for the mechanical relaxation peak located in the tetragonal phase. All the relaxation peaks could be associated to the interaction of oxygen vacancies in …

010302 applied physicsPermittivityMaterials scienceCondensed matter physicsGeneral Physics and AstronomyMineralogy02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesFerroelectricityPiezoelectricityShear moduluschemistry.chemical_compoundchemistry[PHYS.HIST]Physics [physics]/Physics archivesvisual_art0103 physical sciencesBarium titanatevisual_art.visual_art_mediumRelaxation (physics)Dielectric lossCeramic0210 nano-technologyLe Journal de Physique IV
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Non-Linearity Extremum in Niobium Doped Potassium Tantalate

1997

We report non-linear dielectric measurements in the KTaO 3 :Nb system (x Nb ≤ 0.05). The non-linear susceptibility diverges at low temperatures and reaches maximum values in the intermediate range (0.0075 ≤ x Nb ≤ 0.02). To account for this extremum non linearity, we propose a model of temperature dependent clusters which fits with a number of experimental reports. We also suggest that this model may be applied to the related compounds SrTiO 3 :Ca and KTaO 3 :Na.

010302 applied physicsPermittivityRange (particle radiation)Materials sciencePotassiumDopingGeneral EngineeringAnalytical chemistryNiobiumchemistry.chemical_elementStatistical and Nonlinear Physics02 engineering and technologyDielectric021001 nanoscience & nanotechnology01 natural sciences3. Good healthTantalatechemistry[PHYS.HIST]Physics [physics]/Physics archivesPercolation0103 physical sciences0210 nano-technologyJournal de Physique I
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The Acoustic Wave Behavior Within the PEA Cell for Space Charge Measurement

2018

In order to evaluate the acoustic wave behavior within the Pulsed Electro Acoustic (PEA) cell, a simulation model has been developed in this work. The model, implemented in Matlab environment, is based on the analogy between acoustic and electrical quantities. Therefore, it was possible to model the PEA cell as cascade connected lossy transmission lines. The model has been validated theoretically by making a comparison with a simulation result found in literature. The experimental validation has also been made by using the PEA cell of the LEPRE high voltage lab. In addition, four graphs have been realized. Two of them can be used to establish in easy and fast way to obtain the minimum groun…

010302 applied physicsPhysics021103 operations researchPEA methodAcousticsElectronic Optical and Magnetic Material0211 other engineering and technologiesPEA modelHigh voltage02 engineering and technologyAcoustic wave01 natural sciencesSignalSpace chargeSettore ING-IND/31 - ElettrotecnicaCascade0103 physical sciencesElectrodeReflection phenomenonReflection (physics)Electrical and Electronic EngineeringMATLABcomputercomputer.programming_language
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Switching by Domain-Wall Automotion in Asymmetric Ferromagnetic Rings

2017

A ring-shaped magnetic logic device offers two vortex states (clockwise and counterclockwise) to encode bits, with relative stability against external magnetic fields. The dynamics of magnetization switching in such structures, though, still need unraveling. The authors present direct experimental visualization of reproducible, robust switching in magnetic rings via domain-wall automotion, which does not require an applied field. Simulations reveal that annihilation of domain walls through automotion always occurs, with the detailed topology of the walls only influencing the dynamics locally, in line with the experimental results.

010302 applied physicsPhysicsField (physics)Condensed matter physicsMagnetic logicGeneral Physics and AstronomyLarge scale facilities for research with photons neutrons and ions01 natural sciencesVortexMagnetic fieldMagnetizationDomain wall (magnetism)Ferromagnetism0103 physical sciences010306 general physicsTopology (chemistry)Physical Review Applied
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Identification of parameters and harmonic losses of a deep-bar induction motor

2017

High frequency harmonics from a frequency converter causes additional losses in a deep-bar induction motor. The harmonics have their own amplitude and phase with respect to the fundamental signal, but the harmonic loss is only dependent on the amplitude of harmonics. A deep-bar induction motor can be modelled by a triple-cage circuit to take skin effect into account. The triple cage circuit having many parameters could be estimated from a small-signal model of the machine by using Differential Evolution. The correctly estimated parameters make the triple-cage circuit valid in a wide range of frequencies. However, the triple-cage circuit is very complicated which makes it difficult to model …

010302 applied physicsPhysicsFrequency multiplier020208 electrical & electronic engineering02 engineering and technologyLC circuit01 natural sciencesHarmonic analysisComputer Science::Hardware ArchitectureComputer Science::Emerging TechnologiesControl theoryHarmonics0103 physical sciences0202 electrical engineering electronic engineering information engineeringHarmonicEquivalent circuitInduction motorLinear circuit2017 Seventh International Conference on Information Science and Technology (ICIST)
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