A5026588042- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor materials and devices
- Semiconductor Quantum Structures and Devices
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Semiconductor Lasers and Optical Devices
- Silicon Carbide Semiconductor Technologies
- Radio Frequency Integrated Circuit Design
- Fusion materials and technologies
- Semiconductor materials and interfaces
- Antenna Design and Analysis
- GaN-based semiconductor devices and materials
- Laser-Plasma Interactions and Diagnostics
- Electromagnetic Compatibility and Noise Suppression
- Silicon and Solar Cell Technologies
- Electronic Packaging and Soldering Technologies
- Energy Harvesting in Wireless Networks
- Healthcare Systems and Practices
- Antenna Design and Optimization
- Atomic and Molecular Physics
- Dust and Plasma Wave Phenomena
- Machine Learning in Healthcare
Universidad Politécnica de Madrid
2022-2024
France Cohortes
2022
Inserm
1978-2022
Material (Belgium)
2022
Centre d'Épidémiologie sur les Causes Médicales de Décès
2008-2022
Centre National de la Recherche Scientifique
1977-2006
École Polytechnique
2006
École Nationale Supérieure de Techniques Avancées
2006
Laboratoire d'Optique Appliquée
2006
CEA Cadarache
1993-2003
Stable and stationary states with hollow current density profiles have been achieved in Tore Supra lower hybrid drive (LHCD) during reduced toroidal magnetic field operation weak LH absorption regimes. For these plasma conditions, off-axis power deposition are obtained a reproducible manner when the internal caustics prevent central of waves. In multipass wave propagation regime, validity statistical treatment stochastic diffusion is shown both theoretically experimentally. When large...
The global energy confinement of combined ohmic and lower hybrid driven TORE SUPRA plasmas has been analysed at various densities. In contradiction to the L mode ITER scaling law, this analysis indicates that time depends strongly on plasma density. Furthermore, thermal electron content steady state discharges is found be in good agreement with Rebut-Lallia-Watkins (RLW) law. Current ramp experiments show an enhancement internal inductance, li. These results have extended regimes current...
The TORE SUPRA lower hybrid current drive experiments (8 MW/3.7 GHz) use large phased waveguide arrays, four rows of 32 active waveguides and two passive for each the grills, to couple waves plasma. These launchers are based on 'multijunction' principle which allows them be quite compact is therefore attractive design efficient multi-megawatt antennas in NET/ITER. Extensive coupling measurements have been performed order study radiofrequency (RF) characteristics plasma loaded antennas....
As a result of experimental observations localized heat flux on components magnetically connected to radiating waveguides in Tore Supra and TdeV, the acceleration electrons near lower hybrid (LH) antennas has been investigated. A simple analytical model developed compute dynamics particles field approximation. Landau damping very high N|| (20 < 100) component launched spectrum thermal scrape-off layer (SOL) is found occur. Simulation typical LH pulse indicates that can be accelerated up 2-3...
The integration of carbon-fibre reinforced polymers (CFRP) in structural applications offers significant advantages due to their high strength-to-weight ratio. However, these materials exhibit limitations under out-of-plane loads, particularly bearing applications. This study explores an innovative approach enhance the performance CFRP structures such scenarios by incorporating annular polyamide inserts manufactured via additive manufacturing (AM). To evaluate mechanical AM inserts, a novel...
In the letter beneficial influence of degeneracy mechanisms on electrical properties a homojunction bipolar transistor has been highlighted.
In the PETULA tokamak, three series of discharges were run, with, successively, limiters made tungsten, alumina and carbon. The characteristics plasma in these situations are presented compared. It is found that lowest oxygen impurity level effective ion charge obtained with limiter. With this limiter, energy confinement time 50% higher than for tungsten During a rather short period, machine was operated carbon limiter which led to very resistive appearance disruptive instabilities related...
A simple mesa GaAlAs/GaAs heterojunction bipolar phototransistor fabricated by LPE growth technique is presented. high current gain of the order 50 000 has been obtained and believed to be highest ever reported for a device. The corresponding sensitivity about 15 A/W an 800 nm illumination wavelength.
The differential capacitance C of an abrupt isotype n Al/sub 0.5/Ga/sub 0.5/As/GaAs heterojunction has been modeled by directly calculating the dependence space charge on voltage V at its terminals. electron distribution was calculated considering 2-D gas simultaneously solving Schrodinger and Poisson equations, DX centers included. Results from this model predict asymmetric bell-shape V, with a maximum near contact potential, are in good agreement experiment. This further provides...
2014 Dans le cadre de la théorie macroscopique diffusion et à partir du diagramme des bandes d'énergie proposé par Anderson, un modèle « contrôle charge » est établi.Celui-ci prend en compte caractère plus ou moins graduel changement largeur bande interdite jonction permet préciser loi variation courant avec tension appliquée relations analytiques compactes.Les paramètres ce sont exprimés fonction caractéristiques technologiques géométriques jonction.Abstract.2014 A charge-control type...