A. Bañón Navarro
A5009746032- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- RNA modifications and cancer
- Cancer Immunotherapy and Biomarkers
- Lung Cancer Treatments and Mutations
- Superconducting Materials and Applications
- Fusion materials and technologies
- Ferroptosis and cancer prognosis
- Plasma Diagnostics and Applications
- Epigenetics and DNA Methylation
- Fluid Dynamics and Turbulent Flows
- Click Chemistry and Applications
- Cancer Research and Treatments
- Astro and Planetary Science
- Cancer Genomics and Diagnostics
- Geomagnetism and Paleomagnetism Studies
- Atomic and Molecular Physics
- Gas Dynamics and Kinetic Theory
- Lung Cancer Research Studies
- Geophysics and Gravity Measurements
- CAR-T cell therapy research
- Geophysics and Sensor Technology
Max Planck Institute for Plasma Physics
2015-2025
Universitat de Barcelona
2022-2025
Consorci Institut D'Investigacions Biomediques August Pi I Sunyer
2024-2025
Hospital Clínic de Barcelona
2024-2025
Universitat Politècnica de Catalunya
2022
Institut de Recerca en Energia de Catalunya
2022
Universidad Complutense de Madrid
2022
Max Planck Society
2011-2021
University of California, Los Angeles
2015-2017
University of Concepción
2016
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...
Abstract The most efficient and promising operational regime for the International Thermonuclear Experimental Reactor tokamak is high-confinement mode. In this regime, however, periodic relaxations of plasma edge can occur. These edge-localized modes pose a threat to integrity fusion device. Here we reveal strong impact energetic ions on spatio-temporal structure in tokamaks using nonlinear hybrid kinetic–magnetohydrodynamic simulations. A resonant interaction between fast at electromagnetic...
The first plasma experiments on the W7AS advanced stellarator were conducted in October 1988, after magnetic surface mapping. characteristics of device are described. During phase operation, 70 GHz ECF was used to generate and heat a 'currentless' which maintained quasi-steady state for typically 0.5 s. Effects configuration confinement measures deal with observed current (bootstrap ECF-driven current) investigated. Preliminary results transport analysis presented compared predictions models.
We report the first observation of localized modulation turbulent density fluctuations n[over ˜] (via beam emission spectroscopy) by neoclassical tearing modes (NTMs) in core DIII-D tokamak. NTMs are important as they often lead to severe degradation plasma confinement and disruptions high-confinement fusion experiments. Magnetic islands associated with significantly modify profiles turbulence drives. In this experiment was found be modulated 14% across island. Gyrokinetic simulations...
We report the results of a direct comparison between different kinetic models collisionless plasma turbulence in two spatial dimensions. The considered include first principles fully-kinetic (FK) description, widely used reduced [gyrokinetic (GK) and hybrid-kinetic (HK) with fluid electrons], novel gyrokinetic approach (KREHM). Two ion beta ($\beta_i$) regimes are considered: 0.1 0.5. For $\beta_i=0.5$, good agreement GK FK is found at scales ranging from to electron gyroradius, thus...
A novel type of transport barrier for reducing turbulent in the core a high temperature magnetically confined fusion plasma has been observed during experiments performed on ASDEX Upgrade tokamak.
Abstract We present recent highlights from the most operation phases of Wendelstein 7-X, advanced stellarator in world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have been maintained for tens seconds. Pellet fueling allows plasma reduced ion-temperature-gradient turbulence, during such phases, overall is so (energy often 200 ms) that attained density temperature profiles would not possible less optimized devices, since...
We analyze plasma heating in weakly collisional kinetic Alfv\'en wave turbulence using high resolution gyrokinetic simulations spanning the range of scales between ion and electron gyroradii. Real space structures that have a higher than average rate are shown not to be confined current sheets. This novel result is at odds with previous studies, which use electromagnetic work local fluid frame, i.e.,...
The influence of the ion mass on dynamics magnetized plasmas is an important challenge in fusion research. discrepancies between improvement magnetic confinement with tokamak experiments and diffusive turbulent transport predictions have remained unexplained for several decades. We refer to this phenomenon as isotope effect. In paper, we study effect gyrokinetic theory using Gene code. find sets plasma parameters that correspond low wavenumber turbulence which present, although intensity...
We present the first localized measurements of long and intermediate wavelength turbulent density fluctuations (ñ) electron temperature (T̃e) modified by m/n=2/1 Neoclassical Tearing Mode (NTM) islands (m n are poloidal toroidal mode numbers, respectively). These wavelengths correspond to expected Ion Temperature Gradient Trapped Electron scales, respectively. Two regimes have been observed when tracking ñ during NTM evolution: (1) small characterized a steep Te radial profile turbulence...
Abstract Experiments on ASDEX Upgrade (AUG) in 2021 and 2022 have addressed a number of critical issues for ITER EU DEMO. A major objective the AUG programme is to shed light underlying physics confinement, stability, plasma exhaust order allow reliable extrapolation results obtained present day machines these reactor-grade devices. Concerning pedestal physics, mitigation edge localised modes (ELMs) using resonant magnetic perturbations (RMPs) was found be consistent with reduction linear...
The Alfvén instability nonlinearly excited the energetic-particle-driven geodesic acoustic mode on ASDEX-Upgrade tokamak, as demonstrated experimentally. mechanism of excitation and nonlinear evolution is not yet fully understood. In present work, a first-principles simulation using MEGA code investigated properties in both linear growth saturated phases. Here we show that successfully reproduced coexistence these two modes, agreed with experimental results well. Conclusive evidence showed...
Abstract On the basis of several recent breakthroughs in fusion research, many activities have been launched around world to develop power plants on fastest possible time scale. In this context, high-fidelity simulations plasma behavior large supercomputers provide one main pathways accelerating progress by guiding crucial design decisions. When it comes determining energy confinement a magnetic device, which is key quantity interest, gyrokinetic turbulence are considered approach choice –...
In gyrokinetic theory, the quadratic nonlinearity is known to play an important role in dynamics by redistributing (in a conservative fashion) free energy between various active scales. present study, transfer analyzed for case of ion temperature gradient driven turbulence. It shown that it shares many properties with fluid particular, one finds forward (from large small scales), extremely local, and self-similar cascade plane perpendicular background magnetic field. These findings shed...
Additional electron cyclotron resonance heating (ECRH) is used in an ion-temperature-gradient instability dominated regime to increase R/LTe order approach the trapped-electron-mode regime. The radial ECRH deposition location determines a large degree effect on R/LTe. Accompanying scale-selective turbulence measurements at perpendicular wavenumbers between k⊥ = 4–18 cm−1 (k⊥ρs 0.7–4.2) show pronounced of large-scale density fluctuations close mid-radius, along with reduction phase velocity...
Neoclassical tearing modes have deleterious effects on plasma confinement and, if they grow large enough, can lead to discharge termination. Therefore, impose a major barrier in the development of operating scenarios present-day tokamaks. Gyrokinetics offers path toward studying multi-scale interactions with turbulence and effect confinement. As first step this goal, we implemented static magnetic islands nonlinear gyrokinetic simulations GENE code. We investigate profiles, flows, transport...
Abstract In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for modern optimized stellarators—while self-consistently retaining neoclassical transport, turbulent transport with 3D effects, and external physical sources—are presented. These exploit a newly developed coupling framework involving global gyrokinetic turbulence code GENE-3D, KNOSOS, 1D solver TANGO. This is used to analyze recently observed degradation of energy confinement in electron-heated...
A gyrokinetic model of ion temperature gradient driven turbulence in magnetized plasmas is used to study the injection, nonlinear redistribution, and collisional dissipation free energy saturated turbulent state over a broad range driving gradients collision frequencies. The dimensionless parameter L(T)/L(C), where L(T) scale length L(C) mean path, shown parametrize transition between saturation regime dominated by transfer small perpendicular (to magnetic field) scales at large all phase...
Turbulent transport is known to limit the plasma confinement of present-day optimized stellarators. To address this issue, a novel method strongly suppress turbulence in such devices proposed, namely resonant wave-particle interaction suprathermal particles-e.g., from ion-cyclotron-resonance-frequency heating-with turbulence-driving microinstabilities like ion-temperature-gradient modes. The effectiveness mechanism demonstrated via large-scale gyrokinetic simulations, revealing an overall...
Abstract This paper presents global gyrokinetic simulations on the transport time scale of an ASDEX Upgrade H-mode discharge showing a pronounced peaking on-axis ion temperature profiles. Leveraging newly developed GENE-Tango tool, which combines code GENE with solver Tango, we investigate impact energetic particles and electromagnetic effects improved plasma performance observed in experimental discharge. Our results reveal that striking agreement between measurements can be achieved only...
Abstract After a long device enhancement phase, scientific operation resumed in 2022. The main new components are the water cooling of all plasma facing and water-cooled high heat flux divertor units. Water allowed for first long-pulse campaign. A maximum discharge length 8 min was achieved with total heating energy 1.3 GJ. Safe demonstrated attached detached mode. Stable detachment is readily some magnetic configurations but requires impurity seeding small pitch angle within edge islands....
Free energy plays an important role in gyrokinetic theory, since it is known to be a nonlinear invariant. Its evolution equations are derived and analyzed for the case of ion temperature gradient driven turbulence, using formalism adopted Gene code. In particular, drive, collisional dissipation as well entropy/electrostatic transfer channels represented by linear curvature parallel terms detail.