El modo de alto confinamiento (H-mode) está considerado como el modo de operación óptimo para futuros dispositivos de fusión nuclear. El H-mode viene acompañado de inestabilidades que provocan la expulsión de partículas y energía, y deterioran el confinamiento del plasma. Aunque dichas inestabilidades son tolerables en los dispositivos...
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January 23, 2018 (v1)PublicationUploaded on: December 4, 2022
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February 21, 2023 (v1)Publication
La fusión nuclear se presenta como una de las grandes opciones tecnológicas para cubrir de manera limpia y sostenible la demanda energética. Sin embargo, lograr la producción de energía en una planta de potencia basada en la fusión nuclear en la Tierra enfrenta importantes desafíos tecnológicos y físicos. Esta tesis es un proyecto...
Uploaded on: February 22, 2023 -
February 4, 2022 (v1)Publication
Nuclear fusion is expected to be a clean and almost-unlimited power source in the near future. The first net power demonstration plant (DEMO) is planned to start operation in 2050. The supercritical carbon dioxide (S-CO2) Brayton cycle is an excellent candidate for integration with a fusion power plant, such as DEMO, because of its high...
Uploaded on: March 24, 2023 -
December 30, 2021 (v1)Publication
The dynamic behaviour of the ion and electron energy, particle and momentum transport measured during type-I edge localized mode (ELM) cycles at ASDEX Upgrade is presented. Fast measurements of the ion and electron temperature profiles revelead that the ion and electron energy transport recover on different timescales, with the electrons...
Uploaded on: December 5, 2022 -
July 19, 2024 (v1)Publication
A new concept for velocity space thermal ion loss detection is presented. This diagnostic provides pitch angle resolved measurements that are unfeasible with current diagnostics. It uses the same detection principle as the Fast-Ion Loss Detector with a scintillator as the active component and includes a double slit configuration to measure...
Uploaded on: July 20, 2024 -
April 26, 2022 (v1)Publication
Spanish Ministry of Science, Innovation and Universities (grant FPU17/06273)
Uploaded on: December 4, 2022 -
April 11, 2022 (v1)Publication
The upgrade of the high field side (HFS) edge charge exchange recombination spectroscopy (CXRS) system of ASDEX Upgrade is presented. This diagnostic provides temperature, rotation and radiance measurements of impurity species by taking advantage of the gas puff based CXRS technique (GP-CXRS). The system is formed by a fast piezoelectric valve,...
Uploaded on: March 25, 2023 -
April 29, 2022 (v1)Publication
EUROfusion Consortium 633053
Uploaded on: December 4, 2022 -
April 6, 2022 (v1)Publication
A feasibility study for a new edge main ion charge exchange recombination spectroscopy (CXRS) system at the ASDEX Upgrade tokamak has been carried out. This diagnostic uses the new edge fast-ion Dα (FIDA) spectrometers and the optical heads of the existing edge CXRS systems. Standard CXRS resolved temperature and rotation profiles rely on the...
Uploaded on: March 25, 2023 -
April 25, 2022 (v1)Publication
EUROfusion Consortium 633053
Uploaded on: December 2, 2022 -
April 26, 2022 (v1)Publication
European Union's Horizon 2020 805162
Uploaded on: December 4, 2022 -
July 18, 2024 (v1)Publication
Impurity profiles have been measured with the edge high field side (HFS) and low field side (LFS) charge exchange recombination spectroscopy suite at ASDEX Upgrade enabling the study of the poloidal structure of the edge parallel flow in H-mode, L-mode and I-mode. In H-mode, asymmetries in the impurity density, toroidal and poloidal rotations...
Uploaded on: July 19, 2024 -
May 9, 2023 (v1)Publication
Fast-α losses in future fusion power plants are expected to follow the co- and counter-current directions due to the isotropy of the fusion reaction. At the ASDEX Upgrade tokamak, the co-current direction (achieved with positive plasma current and negative toroidal magnetic field) has been extensively studied thanks to an array of five fast-ion...
Uploaded on: May 11, 2023 -
April 26, 2022 (v1)Publication
EUROfusion Consortium 633053
Uploaded on: December 4, 2022 -
August 29, 2022 (v1)Publication
We present a non-parametric inference of impurity transport coefficients by using charge exchange recombination spectroscopy measurements of Ne X, Ne VIII, O VIII, and C VI lines. Due to their close atomic numbers, neon, oxygen and carbon impurity ions are assumed to have the same diffusion coefficient D and convection velocity v. Unlike...
Uploaded on: March 25, 2023 -
April 18, 2023 (v1)Publication
One of our grand challenges towards fusion energy is the achievement of a high-performance plasma core coupled to a boundary solution. The high confinement mode (H-mode) provides such a high-performance fusion core due to the build-up of an edge transport barrier leading to a pedestal. However, it usually features type-I edge localized modes...
Uploaded on: April 19, 2023 -
September 5, 2023 (v1)Publication
The SMall Aspect Ratio Tokamak (SMART) is a new spherical machine that is currently being constructed at the University of Seville (Mancini et al., 2021; Agredano-Torres et al., 2021). The operation of SMART will cover three different phases reaching an inductive plasma current ( Iₚ )of more than 500 kA, a toroidal magnetic field ( Bₜ ) of 1 T...
Uploaded on: October 18, 2023 -
July 18, 2024 (v1)Publication
An overview of recent results obtained at the tokamak ASDEX Upgrade (AUG) is given. A work flow for predictive profile modelling of AUG discharges was established which is able to reproduce experimental H-mode plasma profiles based on engineering parameters only. In the plasma center, theoretical predictions on plasma current redistribution by...
Uploaded on: July 19, 2024 -
June 30, 2020 (v1)Publication
Within the EUROfusion MST1 Work Package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the...
Uploaded on: March 25, 2023