L. Bertalot
A5091073926- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Fusion materials and technologies
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Graphite, nuclear technology, radiation studies
- Ionosphere and magnetosphere dynamics
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Ion-surface interactions and analysis
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Cold Fusion and Nuclear Reactions
- Particle Detector Development and Performance
- Nuclear physics research studies
- Radioactive contamination and transfer
- Atomic and Molecular Physics
- Spacecraft and Cryogenic Technologies
- Statistical Mechanics and Entropy
- Gyrotron and Vacuum Electronics Research
- Mass Spectrometry Techniques and Applications
- High-Energy Particle Collisions Research
ITER
2014-2024
Royal Military Academy
2020
Kurchatov Institute
2016
KU Leuven
2016
Fusion for Energy
2016
Culham Centre for Fusion Energy
2005-2010
Culham Science Centre
2005-2010
Japan Atomic Energy Agency
2010
Tohoku University
2010
National Agency for New Technologies, Energy and Sustainable Economic Development
1999-2008
Abstract The JET 2019–2020 scientific and technological programme exploited the results of years concerted engineering work, including ITER-like wall (ILW: Be W divertor) installed in 2010, improved diagnostic capabilities now fully available, a major neutral beam injection upgrade providing record power 2019–2020, tested technical procedural preparation for safe operation with tritium. Research along three complementary axes yielded wealth new results. Firstly, plasma delivered scenarios...
Abstract In 2021 JET exploited its unique capabilities to operate with T and D–T fuel an ITER-like Be/W wall (JET-ILW). This second major campaign (DTE2), after DTE1 in 1997, represented the culmination of a series enhancements—new fusion diagnostics, new injection capabilities, refurbishment plant, increased auxiliary heating, in-vessel calibration 14 MeV neutron yield monitors—as well as significant advances plasma theory modelling community. DTE2 was complemented by sequence isotope...
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...
This paper reports recent progress in the field of γ-ray diagnosis fast ions JET tokamak. The γ-rays, born nuclear reactions between and main plasma impurities and/or fuel ions, are analysed with a new modelling tool (the GAMMOD code) that has been developed for quantitative analysis measured energy spectra. spectra identifies different giving rise to emission assesses effective tail temperatures relative concentrations these ions. assessment is possible, since excitation functions well...
The objective of thermonuclear fusion consists producing electricity from the coalescence light nuclei in high temperature plasmas. most promising route to envisages confinement such plasmas with magnetic fields, whose studied configuration is tokamak. Disruptions are catastrophic collapses affecting all tokamak devices and one main potential showstoppers on a commercial reactor. In this work we report how, deploying innovative analysis methods thousands JET experiments covering isotopic...
In 2003, the performance of 'hybrid' regime was successfully validated in JET experiments up to βN = 2.8 at low toroidal field (1.7 T), with plasma triangularity and normalized Larmor radius (ρ*) corresponding identical ASDEX Upgrade discharges. Stationary conditions have been achieved fusion figure merit ( ) reaching 0.42 q95 3.9. The discharges show similar MHD, edge current profile behaviour, when compared Upgrade. addition, extended hybrid scenario operation higher 2.4 T lower ρ* towards...
ITER is an experimental nuclear reactor, aiming to demonstrate the feasibility of fusion realization in order use it as a new source energy. plasma device (tokamak type) which will be equipped with set diagnostic tools satisfy three key requirements: machine protection, control and physics studies by measuring about 100 different parameters. equipment integrated several ports at upper, equatorial divertor levels well internally many vacuum vessel locations. The Diagnostic Systems procured...
We here present the principles and main physics capabilities behind design of radial gamma ray spectrometers (RGRS) system for alpha particle runaway electron measurements at ITER. The diagnostic benefits from recent advances in gamma-ray spectrometry tokamak plasmas combines space high energy resolution a single device. RGRS as designed can provide information on particles time scale 1/10 slowing down ITER 500 MW full power DT scenario. Spectral observations 3.21 4.44 MeV peaks reaction...
An overview is given of the experimental method, analysis technique and results for trace tritium experiments conducted on JET tokamak in 2003. Observations associated with events such as sawtooth collapses, neo-classical tearing modes edge localized are described. Tritium transport seen to approach levels plasma core at high density low q(95), barrier region internal (ITB) discharges. remains well above all other cases. The correlation measured diffusion coefficient convection velocity...
Gamma-ray images of fast D- and 4He-ions accelerated with third-harmonic ion-cyclotron-resonance heating 4He-beam were simultaneously recorded for the first time in JET tokamak experiments dedicated to investigation burning plasmas 3.5 MeV fusion alpha (α) particles. Gamma (γ) rays, born as a result nuclear reactions, 9Be(4He, nγ)12C 12C(D, pγ)13C, between ions main plasma impurities, are measured using two-dimensional multicollimator spectrometer array, which distinguishes γ-rays from...
Neutron spectrometry is a tool for obtaining important information on the fuel ion composition, velocity distribution and temperature of fusion plasmas. A compact NE213 liquid scintillator, fully characterized at Physikalisch-Technische Bundesanstalt, was installed operated Joint European Torus (JET) during two experimental campaigns (C8-2002 trace tritium experiment-TTE 2003). The results show that this system can operate in real experiment as neutron (1.5 MeV<En<20 MeV)...
Abstract The paper presents an overview of the design status Radial Neutron Camera (RNC), that, together with Vertical Camera, will provide, through reconstruction techniques applied to measured line-integrated neutron fluxes, time resolved measurement ITER and α-source profile (i.e. emissivity, neutrons emitted per unit volume). RNC is composed two subsystems, In-Port Ex-Port located, respectively, inside outside Plug Equatorial Port #01. subsystem in a more advanced stage since it has...
Electron temperatures in excess of 8 keV have been obtained by electron-cyclotron-resonance heating on FTU plasmas at peak densities up to $8\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{m}{}^{\ensuremath{-}3}$. The magnetic shear the plasma core is low or negative, and electron heat diffusivity remains at, below, Ohmic level $(0.2\mathrm{m}{}^{2}/\mathrm{s})$, spite very large power density $(10--20\mathrm{MW}/\mathrm{m}{}^{3})$ which produces extremely high temperature gradients (up...
Studies on the current-drive (CD) efficiency have been carried out in FTU tokamak with 8 GHz lower-hybrid waves up to line-averaged plasma density ${\overline{n}}_{e}>1\ifmmode\times\else\texttimes\fi{}{10}^{20}{\mathrm{m}}^{\ensuremath{-}3}$. High efficiencies, larger than $0.2\ifmmode\times\else\texttimes\fi{}{10}^{20}{\mathrm{m}}^{\ensuremath{-}2}\mathrm{A}/\mathrm{W}$, are obtained for clean conditions, no significant degradation as is increased accessibility limit. The electron...
Gamma-ray spectra from nuclear reactions between fusion-born alpha (alpha) particles and Be impurities were measured for the first time in deuterium-tritium plasmas Joint European Torus. The dependence of allowed determination density evolution fast particles. Correlation decay gamma-ray emission plasma parameters different scenarios was established. Results are consistent with classical slowing down discharges high currents monotonic q-profiles. In low current large on-axis holes (extreme...
Methods for ion detection with high spatial and spectral resolution in the energy range 70 keV≤Ed≤5 MeV were developed applied at plasma focus facilities. Particularly, fusion reaction protons of D(d,p) T studied. Nuclear track detectors LR115A, CR-39, CR-39/PM355 aluminum foil filters front used calibrated using a Thomson analyzer. The influence azimuthal magnetic field on trajectories charged particles was calculated an optical code.
The next generation of large scale fusion devices—ITER/LMJ/NIF—will require diagnostic components to operate in environments far more severe than those encountered present facilities. This harsh environment is the result high fluxes neutrons, gamma rays, energetic ions, electromagnetic radiation, and some cases, debris shrapnel, at levels several orders magnitude higher experienced today’s devices. similarities dissimilarities between environmental effects on for inertial confinement...