A5100668618- Magnetic confinement fusion research
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Plasma Diagnostics and Applications
- Carbon Nanotubes in Composites
- Dielectric materials and actuators
- Metal and Thin Film Mechanics
- Ionosphere and magnetosphere dynamics
- Nanowire Synthesis and Applications
- Neuroscience and Neural Engineering
- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Gold and Silver Nanoparticles Synthesis and Applications
- Tactile and Sensory Interactions
- Glass properties and applications
- Nanotechnology research and applications
- Surface Modification and Superhydrophobicity
- Mechanical and Optical Resonators
- Quantum Dots Synthesis And Properties
- Electronic and Structural Properties of Oxides
- Luminescence Properties of Advanced Materials
National Agency for New Technologies, Energy and Sustainable Economic Development
2012-2025
Culham Centre for Fusion Energy
2024
Institute for the Science and Technology of Plasmas
2020-2024
Osservatorio Astronomico di Padova
2024
Politecnico di Milano
2024
Institute of Plasma Physics
2006-2023
National Research Council
2010-2021
École Polytechnique Fédérale de Lausanne
2016-2021
National Centre for Nuclear Research
2021
Italian Institute of Technology
2007-2016
The ``classical'' model of the ${[\mathrm{AlO}}_{4}{]}^{0}$ defect center in irradiated quartz, an Al impurity having replaced a four-coordinated Si atom, is that hole forms nonbonding orbital oxygen with consequent asymmetric relaxation along particular Al-O direction. This has been proposed years ago, based on analysis electron-paramagnetic-resonance spectra Al-containing crystalline ${\mathrm{SiO}}_{2}$ and Hartree-Fock cluster calculations. Three recent theoretical studies...
In this paper, we propose a novel technological approach for the implementation of large-area flexible artificial skin based on arrays piezoelectric polymer transducers. Polyvinylidene fluoride (PVDF) transducers are chosen high electromechanical transduction frequency bandwidth (up to 1 kHz). A low-cost and scalable technique extracting PVDF signals is used directly provide film with patterned electrodes. If meant cover large areas robot body, specific requirements have be fulfilled from...
In this paper, we present an ultraflexible tactile sensor, in a piezo-eletricoxide-semiconductor FET configuration, composed by poly[vinylidenefluoride-co-trifluoroethylene] capacitor with embedded readout circuitry, based on nMOS polysilicon electronics, integrated directly polyimide. The device is designed according to extended gate configuration. sensor exhibits enhanced piezoelectric properties, thanks the optimization of poling procedure (with electric field up 3 MV/cm), reaching final...
Abstract ITER is of key importance in the European fusion roadmap as it aims to prove scientific and technological feasibility a future energy source. The EUROfusion consortium labs within Europe contributing preparation exploitation operation aspires exploit outcomes view DEMO. paper provides an overview major progress obtained recently, carried out frame new (initiated 2021) work-package called ‘ Pr eparation I TER O peration’ (PrIO). directly supported by eleven PrIO contributions given...
The electronic structure of an isolated oxygen vacancy in ${\mathrm{SrTiO}}_{3}$ has been investigated with a variety ab initio quantum mechanical approaches. In particular we compared pure density functional theory (DFT) approaches the Hartree-Fock method, and hybrid methods where exchange term is treated mixed way. Both local cluster models periodic calculations large supercells containing up to 80 atoms have performed. diamagnetic (singlet state) paramagnetic (triplet solutions...
The study of the complex interfaces between organic semiconductors and liquids have recently gained increasing attention due to their interesting applications as biosensors in biological environments, photovoltaics, bioinspired light-harvesting systems. Here, we report a detailed characterization interface polymer films electrolytic solutions, both by photocurrent spectroscopy electrochemical measurements. In particular, demonstrate that photocatalytic semi-water splitting reaction, leading...
Wall conditioning is essential in tokamak and stellarator research to achieve plasma performance reproducibility. This paper presents an overview of recent results, both from experiments present devices modelling, view with superconducting coils, focus on W7-X, JT-60SA ITER. In these devices, the coils stay energised throughout experimental day or week which demands for new techniques that work presence nominal field, addition proven methods such as baking, glow discharge (GDC) low-Z wall...
The structure of thin, aggregated layers CuS nanoparticles, grown in Langmuir−Blodgett film precursors, was investigated with atomic force microscopy along the study their electrical conductivity. Very thin revealed an essentially insulating behavior. These were composed isolated particle aggregates that had a mean thickness corresponding to average diameter. increase resulted formation conducting pathways formed by layer plane. Such samples increased Finally, when initial precursor LB more...
We have studied the optical absorptions of a series point defects in SiO2 by means time-dependent density functional response theory (TD-DFT). The structure has been described with cluster models and atomic orbital basis functions. For each center lowest singlet→singlet singlet→triplet (for diamagnetic defects) doublet→doublet paramagnetic transitions considered. results compared accurate ab initio calculations based on explicit treatment correlation effects and, when possible, experimental...
The electronic properties of Mg-O divacancy defects at the MgO surface obtained by removing a pair O and Mg ions from terrace, step, or corner sites have been investigated using an embedded cluster model. Long-range polarization lattice relaxation effects included through shell model approach. It is demonstrated that all these are electron traps: addition one to neutral precursor results in stable paramagnetic center. We calculate relaxed affinities, vertical ionization energies, formation...
A drift-kinetic model to describe the plasma dynamics in scrape-off layer region of tokamak devices at arbitrary collisionality is derived. Our formulation based on a gyroaveraged Lagrangian description charged particle motion, and corresponding Boltzmann equation that includes full Coulomb collision operator. Using Hermite-Laguerre velocity space decomposition distribution function, set equations evolve coefficients expansion presented. By evaluating explicitly moments operator, functions...
On the FTU tokamak, collective Thomson scattering (CTS) diagnostic was renewed for investigating possible excitation of parametric decay instabilities (PDI) by electron cyclotron (EC) or CTS probe beams in presence magnetic islands and measure their effects on EC power absorption.
The first direct experimental measurements of the scattering a millimeter-wave beam by plasma blobs in simple magnetized torus are reported. wavelength is comparable to characteristic size blob. In situ Langmuir probe show that fluctuations electron density induce correlated transmitted power. A first-principles full-wave model, using conditionally sampled 2D profiles, predicts power agreement with experiments.
The intrinsic limited toroidal electric field (0.3 V m−1) in devices with superconducting poloidal coils (ITER, JT-60SA) requires additional heating, like electron cyclotron (EC) waves, to initiate plasma and sustain it during the burn-through phase. FTU tokamak has contributed studying perspective of EC assisted breakdown. Afterward, a new experimental modeling activity addressing study start-up configuration close ITER one (magnetic field, oblique injection, polarization) been performed is...
The narrow power decay-length ($\lambda_q$), recently found in the scrape-off layer (SOL) of inner-wall limited (IWL) discharges tokamaks, is studied using 3D, flux-driven, global two-fluid turbulence simulations. formation steep plasma profiles measured to arise due radially sheared $\vec{E}\times\vec{B}$ poloidal flows. A complex interaction between flows and outflowing currents regulates turbulent saturation, determining transport levels. We quantify effects flows, obtaining theoretical...
Edge plasma codes, such as SOLPS, are widely used to study transport in tokamaks scrape-off layers (SOL). The possibility apply these codes non hydrogenic plasmas and linear devices is gaining the interests of fusion community. These facilities play a pivotal role plasma-material interaction studies for future may allow test code capabilities both terms geometry simulated species. In this contribution, we SOLPS-ITER simulations Argon medium-flux machine GyM. A sensitivity scan over pumping...
Abstract Carbon nanotubes (CNTs) have electrical and mechanical properties that make them highly attractive for actuators. They the ability to deform elastically by several percent, thus storing very large amounts of energy, thanks their crystalline nature morphology. A bimorph actuator composed single‐walled carbon (SWCNTs), polyvinylidene difluoride (PVdF) ionic liquid (IL) 1‐butyl 3‐methylimidazolium tetrafluoroborate [BMIM][BF 4 ] with a polymer‐supported internal IL electrolyte was...
The JT-60SA tokamak, being built under the Broader Approach agreement jointly by Europe and Japan, is due to start operation in 2020 expected give substantial contributions both ITER DEMO scenario optimisation. A broad set of preparation activities for an efficient experiments on carried out, involving elaboration Research Plan, advanced modelling various domains, feasibility conception studies diagnostics other sub-systems connection with priorities scientific programme, development...