A5047095643- Magnetic confinement fusion research
- Fusion materials and technologies
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Ionosphere and magnetosphere dynamics
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Cardiovascular and exercise physiology
- Solar and Space Plasma Dynamics
- Cardiovascular Effects of Exercise
- Heart Failure Treatment and Management
- High voltage insulation and dielectric phenomena
University of Lisbon
2019-2023
Instituto Superior Técnico
2023
Instituto Politécnico de Lisboa
2023
Culham Science Centre
2021-2022
Abstract We present an overview of results from a series L–H transition experiments undertaken at JET since the installation ITER-like-wall (JET-ILW), with beryllium wall tiles and tungsten divertor. Tritium, helium deuterium plasmas have been investigated. Initial in tritium show ohmic transitions low density power threshold for ( P LH ) is lower than ones densities, while we still lack contrasted data to provide scaling high densities. In there notable shift which minimum <?CDATA...
Abstract The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of L-H power threshold an ITER-like wall environment (Be and W divertor). Here we present results from dedicated transition experiments at JET-ILW, documenting tritium plasmas, comparing them with matching deuterium hydrogen datasets. From earlier it is known that as plasma isotopic composition changes deuterium, through varying deuterium/hydrogen concentrations,...
Abstract This study investigates the dependence of radial electric field (Er) on line-averaged density in JET L-mode plasmas, utilizing Doppler backscattering measurements. Density ramp discharges up to limit are analyzed investigate physical processes that determine edge Er profile. At low densities, profile at midplane exhibits a pronounced peak near scrape-off layer (SOL) and shallow well inside separatrix. As increases, SOL diminishes quickly deepens until Greenwald fraction fGW ≈ 0.8,...
Abstract JET-ILW type I ELMy H-modes at 2.5 MA/2.8 T with constant NBI heating (23 MW) and gas fuelling rate were performed, utilising edge localised mode (ELM) pacing by vertical kicks plasma shaping (triangularity, δ ) as tools to disentangle the effects of ELMs, inter-ELM transport stability on pedestal particle balance. In agreement previous studies, confinement improves increasing , mostly due a significant increase in density while ELM frequency ( <?CDATA $f_{\mathrm{ELM}}$?> <mml:math...
Perpendicular velocity, v⊥, measurements have been obtained in JET experiments designed to investigate the underlying mechanisms influencing L–H power threshold. transitions were induced by using both NBI and ICRH deuterium helium plasmas. The v⊥ profile low density branch of transition has a modest or even no well marked peak near separatrix heated discharges for D He plasmas, with sharper SOL As line-averaged increases, decreases, agreement modifications electron temperature at divertor...
Abstract The role of the divertor configuration and plasma physics on L–H transition is poorly understood, leading to large uncertainties in predicting power threshold future devices. This contribution reports edge perpendicular flow measurements by Doppler backscattering JET experiments with outer strike-point at different positions: horizontal target (HT), vertical (VT), corner (between HT VTs). was found be significantly affected changes region inside separatrix. Our results do not show...
Exercise oscillatory ventilation (EOV) is a strong prognostic marker in patients with heart failure (HF) and left ventricular (LV) dysfunction. This phenomenon can be explained through single quantitative measurement of ventilatory instability, the loop gain. Therefore, we aimed to evaluate whether gain could better tool than subjective EOV evaluation identify HF higher risk major cardiovascular complications. was single-center retrospective study that included ejection fraction (LVEF) ≤ 50%...