A5021498466- Fusion materials and technologies
- Ion-surface interactions and analysis
- Metal and Thin Film Mechanics
- Nuclear Materials and Properties
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Advanced Materials Characterization Techniques
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Advanced materials and composites
- Particle accelerators and beam dynamics
- Gamma-ray bursts and supernovae
- Plasma Diagnostics and Applications
- Metal Alloys Wear and Properties
- Mass Spectrometry Techniques and Applications
- Non-Destructive Testing Techniques
- Superconducting Materials and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Wave and Wind Energy Systems
- Advanced Sensor Technologies Research
- Advancements in Battery Materials
- High voltage insulation and dielectric phenomena
- Powder Metallurgy Techniques and Materials
- Ocean Waves and Remote Sensing
Max Planck Institute for Plasma Physics
2015-2024
Max Planck Society
2015-2021
Technical University of Munich
2018
Institute for Particle and Nuclear Physics
2016
HUN-REN Wigner Research Centre for Physics
2016
The provision of a particle and power exhaust solution which is compatible with first-wall components edge-plasma conditions key area present-day fusion research mandatory for successful operation ITER DEMO. work package plasma-facing (WP PFC) within the European programme complements laboratory experiments, i.e. in linear plasma devices, electron ion beam loading facilities, studies performed toroidally confined magnetic such as JET, ASDEX Upgrade, WEST etc. connection both groups done via...
Abstract The ASDEX Upgrade (AUG) programme, jointly run with the EUROfusion MST1 task force, continues to significantly enhance physics base of ITER and DEMO. Here, full tungsten wall is a key asset for extrapolating future devices. high overall heating power, flexible mix comprehensive diagnostic set allows studies ranging from mimicking scrape-off-layer divertor conditions DEMO at density fully non-inductive operation ( q 95 = 5.5, ) low density. Higher installed electron cyclotron...
Tritium self-sufficiency presents a critical engineering challenge for DEMO, requiring efficient breeding and extraction systems, as well minimizing tritium losses to the surrounding such plasma-facing components, vacuum vessel, cooling system, etc. Structural components will act sink, be accumulated in bulk of these due energetic particle bombardment may permeate out system. The design consequently directly influence plant lifetime, operational safety cost any future power plant. Therefore,...
Currently, for the EU DEMO, two Breeding Blankets (BBs) have been selected as potential candidates integration in reactor. They are Water Cooled Lithium Lead and Helium Pebble Bed BB concepts. The variants together with associated ancillary systems drive design of overall plant. Therefore, a holistic investigation issues derived by installation its has performed. related to water activation due 16N 17N isotopes impact on primary heat transfer investigated providing guidelines dedicated...
Abstract An overview of recent results obtained at the tokamak ASDEX Upgrade (AUG) is given. A work flow for predictive profile modelling AUG discharges was established which able to reproduce experimental H-mode plasma profiles based on engineering parameters only. In center, theoretical predictions current redistribution by a dynamo effect were confirmed experimentally. For core transport, stabilizing fast ion distributions turbulent transport shown be important explain isotope and...
Abstract Future fusion reactors will have to breed enough tritium (T) sustain continuous operation and produce excess T power up other reactors. Therefore, is a scarce resource that must not be lost inside the plants systems. The factor describes production ‘tritium breeding ratio’ (TBR) which ratio of breading rate in atoms per second burn second. Its value calculated from neutronics analyses process blanket coupled dynamics processing plant. However, these calculations generally ignore...
The influence of surface roughness on the sputter yield was investigated as a function angle incidence. In this work, nm-smooth and rough samples with roughnesses µm length scale were produced by depositing thin Fe W films smooth Si substrates via magnetron sputtering. morphology determined atomic force microscopy. exposed to 6 keV D3+ ion beam (2 keV/D) under various angles incidence ranging from 0° 75° respect normal fluences order 1022 D/m2. layer thickness measured Rutherford...
EUROFER is a Reduced Activation Ferritic Martensitic (RAFM) steel developed as structural material for future fusion power plants and considered first-wall in recessed areas of DEMO. Recent work has shown fluence-dependent decrease the sputter yield bombardment with deuterium ions energy range 100 to about 500 eV. This was previously attributed preferential sputtering lower mass constituents EUROFER, such Fe Cr, compared higher alloying elements. leads an increase surface tungsten...
In this work, the RAFM steels EUROFER, RUSFER and CLAM, along with a reference pure Fe sample, were all exposed to same source of deuterium analyzed using techniques, allowing direct comparison experimental results. A 200 eV/D mass-selected ion beam at SIESTA facility was used bombard samples fluence 5 × 1024 D m−2 450 K. The surface morphology investigated Scanning Electron Microscopy. sputter yield determined by weight-loss measurements confirmed eroded depth. near-surface enrichment W Ta...
Abstract The impact of lithium (Li) on plasma performance was investigated at the ASDEX Upgrade tokamak, which features a full tungsten wall. Li pellets containing 1.6 × 10 20 atoms were launched with speed 600 m s −1 to achieve deep penetration into and minimize first Homogeneous transient concentrations in up 15% established. sustainment time decreased an increasing heating power from 150 40 ms. Due pellet rate being restricted 2 Hz, no pile-up could take place. No significant positive...
The reduced activation ferritic martensitic steel EUROFER is one of the foreseen structural materials for future fusion reactors. exposure to energetic neutrons will generate displacement damage in which acts as trapping sites hydrogen isotopes (HIs). For predictive simulations HI retention concentration trap and trap-binding energies are needed. In this work potential influence HIs present during on resulting site investigated. samples exposed multiple sequences by MeV W-ions subsequent...
Time-of-flight Rutherford backscattering spectroscopy (ToF-RBS) with incident heavy ions offers a substantially improved depth resolution compared to conventional RBS He ions. The new Garching ToF-RBS detector is located at scattering angle of 150° free flight path 1.313 m and time 600 ps. experimentally achieved the surface W-containing Fe samples 2–3 nm using Si Model systems consisting layers 0.7, 1.5 4.2 at% W EUROFER steel (containing 0.34 + Ta) were eroded by 200 eV D fluence 1023 D/m2...
Second ion experiment for sputtering and TDS analysis is a high-current source erosion retention studies with focus on wall materials fusion devices. The system composed of DuoPIGatron type source, three consecutive grids extraction, acceleration beam focusing, differential pumping stage, dipole magnet mass filtering, quadrupole doublet lens, target chamber, load-lock, chamber thermal desorption spectrometry. potential the can be varied between 500 V 10 kV. has base pressure 10−8 mbar an...
Experiments have been performed at ASDEX Upgrade, aiming to investigate the impact of lithium in an all-metal-wall tokamak and attempting enhance pedestal operational space. For this purpose, a pellet injector has developed, capable injecting pellets carrying particle content ranging from 1.82 × 10(19) atoms (0.21 mg) 1.64 10(20) (1.89 mg). The maximum repetition rate is about 2 Hz. Free flight launch torus outboard side without guiding tube was realized. In such configuration, angular...
In ITER, the first mirrors would be vulnerable to deposition from wall materials, namely beryllium (Be) and tungsten (W) in mixed compositions. this study we investigate capactively coupled RF plasma sputtering of such Be-W deposits on rhodium-coated substrates, using deuterium as process gas, track enrichment W during process. Experiments were conducted with concentration varying 2 8.3 at.%, maximal ion energies 70 220 eV. The evolution depended considerably both energy well initial films....
Within the Bayesian framework a non-intrusive uncertainty quantification is performed to assess of ion–solid interaction simulations. For this we employ reduced-order spectral expansion approach which capable confining number model runs feasible size. Moreover, method facilitates sensitivity examinations regarding input parameters model. It applied simulation program SDTrimSP with several uncertain but normally distributed parameters, i.e., impact angle α , projectile energy E 0 and surface...
Tritium self-sufficiency is a key requirement for future fusion power plants. Therefore, it will be necessary to minimize tritium losses the surrounding systems, such as breeding modules, plasma-facing components, cooling system, etc. These components and systems act also sink, retained in metal walls traps produced during manufacturing or induced by neutron irradiation. The design of therefore have direct impact on performance, operational safety cost any plant. Consequently, accurate...
En este trabajo se presenta la síntesis electroquímica de polianilina (PANI), sobre carbono 2HB, en presencia hierro (Fe) y rutenio (Ru). Dichos compositos demostraron tener actividad catalítica reacciones transferencia hidrógeno acetofenona, usando isopropanol como fuente protones, un medio básico. Los mejores resultados obtuvieron con el composito PANI-Ru, obteniendo hasta 55% conversión. Así activación del peróxido hidrógeno.
Nonlinear waves on a two-part stretched string are considered as reduced model of nonlinear in sea ice near sudden change properties. Geometric nonlinearity is retained, and the confined to wave packet. The weakly approach results three coupled amplitude equations, one for incident, reflected, transmitted waves. create local mean displacement at interface two sides, which provides primary effect. This interfacial requires time-history approach, treated here with Laplace transforms. show that...
Within a Bayesian framework we propose non-intrusive reduced-order spectral approach (polynomial chaos expansion) to assess the uncertainty of ion-solid interaction simulations. The method not only reduces number function evaluations but provides simultaneously quantitative measure for which combinations inputs have most important impact on result. It is applied simulation program SDTrimSP with several uncertain and Gaussian distributed input parameters, i.e., angle α , projectile energy E 0...
The surface height in a shallow water accretion flow experiment is measured by means of Fourier transform profilometry and the fluctuations are characterized. analog standing shock instability (SWASI) appears with an azimuthal mode number one presence supercritical radial direction. During occurrence SWASI, gravity waves preferentially propagate radially outward. This consistent advective-acoustic cycle driving instability.