A5049965045- Magnetic confinement fusion research
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Nuclear Materials and Properties
- Distributed and Parallel Computing Systems
- Scientific Computing and Data Management
- Parallel Computing and Optimization Techniques
- Plasma Diagnostics and Applications
- Distributed systems and fault tolerance
- Calibration and Measurement Techniques
- Advanced Data Storage Technologies
- Security and Verification in Computing
- Ionosphere and magnetosphere dynamics
- High-Energy Particle Collisions Research
- Fault Detection and Control Systems
- Plasma and Flow Control in Aerodynamics
- Anomaly Detection Techniques and Applications
- Geographic Information Systems Studies
- Grit, Self-Efficacy, and Motivation
- Education, Achievement, and Giftedness
- Force Microscopy Techniques and Applications
- Nutritional Studies and Diet
Hochschule Macromedia
2025
Forschungszentrum Jülich
2010-2024
University of Verona
2022
Royal Military Academy
2020
CEA Cadarache
2017
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017
Ernst Ruska Centre
2016
Culham Science Centre
2016
Stadtwerke Jülich (Germany)
2002-2003
The erosion of tungsten (W), induced by the bombardment plasma and impurity particles, determines lifetime plasma-facing components as well impacting on performance influx W into confined region. screening divertor transport in largely content core, but source strength itself has a vital impact this process. JET tokamak experiment provides access to large set erosion-determining parameters permits detailed description closest ITER one: (i) effective sputtering yields fluxes function energy...
This study explored the impact of different feedback forms on psychological parameters learning success: motivation, engagement, and GRIT (GRIT: Growth, Resilience, Integrity, Tenacity, a concept introduced to describe perseverance passion for long-term goals) among 6th 7th-grade students at secondary schools in Bavaria, Germany, employing 2 × 3 factorial design. The factors included type (human-based vs. computer-based), declaration (grades/points anonymously social comparison/group...
The dynamics and stability of divertor detachment in N 2 seeded, type-I, ELMy H-mode plasmas with dominant NBI heating the JET ITER-like wall device is studied by means an integrated analysis diagnostic data from several systems, classifying relative to ELM times.It thereby possible study response evolution control parameters (SOL input power, upstream density impurity fraction) prevailing during inter-ELM periods effect ELMs on detached divertor.A relatively comprehensive overview achieved,...
ERO is a Monte-Carlo code for modeling plasma-wall interaction and 3D plasma impurity transport applications in fusion research. The has undergone significant upgrade (ERO2.0) which allows increasing the simulation volume order to cover entire edge of device, allowing more self-consistent treatment comparison with larger number variety experimental diagnostics. In this contribution, physics-relevant technical innovations new version are described discussed. capabilities demonstrated by...
Abstract A sequence of fuel recovery methods was tested in JET, equipped with the ITER-like beryllium main chamber wall and tungsten divertor, to reduce plasma deuterium concentration less than 1% preparation for operation tritium. This also a key activity regard refining clean-up strategy be implemented at end 2nd DT campaign JET (DTE2) assess tools that are envisaged mitigate tritium inventory build-up ITER. The began 4 days baking 320 °C, followed by further which Ion Cyclotron Wall...
Abstract Imaging diagnostics in Joint European Torus have become essential the study of plasma wall interactions and protection facing components. During deuterium operations, location these was at close proximity to vessel. However, for 50–50 deuterium-tritium operation, neutron yield impact onto electronics imaging would caused them fail completely locations. Shielding systems from neutrons is achieved by relocating a selected number outside Hall (i.e. other side biological shield wall)....
Today, many scientific disciplines heavily rely on computer systems for in-silico experimentation or data management and analysis. The employed hard- software is heterogeneous complies to different standards, interfaces protocols interoperation. Grid middleware like UNICORE 6 try hide some of the complexity underlying by offering high-level, uniform executing computational jobs storing, moving, searching through data. Via resources can be accessed securely with clients, e.g. Command line...
The identification of the sources atomic tungsten and measurement their radiation distribution in front all plasma-facing components has been performed JET with help two digital cameras same two-dimensional view, equipped interference filters different bandwidths centred on W I (400.88 nm) emission line. A new algorithm for subtraction continuum was successfully developed is now used to evaluate erosion even inner divertor region where strong recombination dominating over emission. Analysis...
The aim of this work was to provide a comprehensive insight concerning coated films which might be used for first mirrors in ITER. influence the mirror crystallite size has been addressed as well coating techniques nanocrystalline films. Tests both laboratories and tokamaks are reviewed. For tokamak tests wide angle camera system installed JET-ILW is composed box with 3 stainless steel rhodium viewing torus through conically shaped aperture. delivered required image quality plasma monitoring...
Identification of the mechanisms for H-mode density limit in machines with fully metallic walls, and their scaling to future devices is essential find these optimal operational boundaries highest attainable confinement. Systematic investigations plasmas experiments deuterium external gas fuelling have been performed on JET AUG results compared one another. Basically, operation phases are identical both tokamaks: stable phase, degrading breakdown energy confinement deterioration usually...
In JET with ITER-like wall (JET-ILW), the first was changed to metallic materials (tungsten and beryllium) [1] which require a reliable protection system avoid damage of plasma-facing components (PFCs) due beryllium melting or cracking tungsten owing thermal fatigue.To address this issue, real time control, based on imaging diagnostics, has been implemented JET-ILW in 2011. See author list "X.Litaudon et al 2017 Nucl.Fusion 57 102001″ This paper describes design, implementation, operation...
Intra-ELM tungsten sources, which dominate the total W source, are quantified in inner and outer divertor of JET-ILW. The amount sputtered atoms for individual ELMs demonstrates a clear dependence on ELM frequency. It decreases when pedestal temperature is lower and, correspondingly, frequency higher. Nevertheless, entire gross erosion source (the number eroded per second due to ELMs) increases initially with reaches its maximum at fELM ≈ 50–55 Hz followed by reduction high range. in/out...
Abstract The isotope effect, hydrogen (H) versus deuterium (D), on the gross beryllium (Be) erosion yield has been measured in ohmic limiter plasmas JET tokamak by spectroscopic means. A simplified method to extract effective sputtering from quotient of radiances D α or γ and Be II lines at 527 nm was applied. clear effect found, being about a factor 2 larger compared H whole explored plasma density range. This is agreement with physical data obtained + ion beams also material surface...
Abstract A remote viewing system located outside the biological shield wall to image divertor region in JET is presented here. This paper focuses on optical and mechanical designs of installation a line sight which capable imaging over an distance approximately 31 m. In addition, it includes experience obtained during operations demonstrates its successful performance. was second used D-T campaign follows from dedicated wide angle view also compatible with common elements construction two...
On JET with fully metallic first wall, highly radiative conditions N2, Ne and Ar as well their mixture radiators are approached in high density H-mode plasmas. The confinement increases from H98(y,2) = 0.65 unseeded pulses γrad ∼ 30% to a value of 0.75 at 50% N2 injection. A degradation the pedestal profile is compensated by steeper core ne Te profiles. Further increase seeding rate leads moderate which can be avoided applying combined impurity seeding. enhancement plasma performance for...
In order to understand the mechanisms for H-mode density limit in machines with fully metallic walls, systematic investigations of plasmas experiments deuterium and hydrogen external gas fuelling have been performed on JET-ILW.The observed JET D-as well as H-plasmas demonstrates similar operation phases: stable phase, degrading H-mode, breakdown energy confinement deterioration accompanied by a dithering cycling followed L-mode phase.The is not related an inward collapse hot core plasma due...
For the first time, JET operation in deuterium-tritium (D-T) plasma, which is scheduled to take place on 2020, will be performed ITER mix of plasma-facing component materials.In view preparation DT campaign (DTE2), several aspects plasma require significant improvements, such as a real-time protection wall.The risk damaging metallic PFCs caused by beryllium melting or cracking tungsten owing thermal fatigue required new reliable D-T compatible active system.Therefore, future development real...
The analysis of the radiation damage imaging systems is based on all different types analogue/digital cameras with uncooled as well actively cooled image sensors in VIS/NIR/MWIR spectral ranges. Monte Carlo N-Particle (MCNP) code has been used to determine neutron fluence at camera locations JET. An explicit link between sensor and observed. Sensors show an increased dark-current numbers hot-pixels. Uncooled must be replaced once per year after exposure a ∼1.9–3.2 × 1012neutrons/cm2. Such...
A new powerful software framework JUVIL (JET Users Video Imaging Library) has been developed and successfully installed at JET for fast data visualization advanced analysis of all types imaging data. The is based on modular object-oriented components implemented in Python to simplify work with scientific It provides standard interfaces access video post-processing, which are highly configurable can be easily extended adapted formats cameras. One the GUI player, widely used during last...
Recent improvements in software tools and methodology have allowed us to perform a more comprehensive in-vessel calibration for all mid-infrared camera systems at JET. A comparison of experimental methods calculate the non-uniformity correction is described as well linearity different systems. Measurements temperature are assessed diagnostics.
The in situ absolute calibration of the JET real-time protection imaging system has been performed for first time by means radiometric light source placed inside vessel and operated remote handling. High accuracy is confirmed cross-validation near infrared (NIR) cameras against each other, with thermal IR cameras, beryllium evaporator, which lead to successful wall during last campaign. operation temperature ranges NIR materials used on are Be 650-1600 °C, W coating 600-1320 650-1500 °C.
Tungsten erosion was quantified during inter/intra-ELM periods in He-dominated JET-ILW plasmas by optical emission spectroscopy. The intra-ELM tungsten sputtering helium plasmas, which dominates the total W source, prevails a factor of about 4 over inter-ELM investigated ELM frequency range from 90 Hz–120 Hz. He ions are mainly responsible for ELMs plasmas. strong in/out asymmetry ELM-induced is observed even at high frequencies beyond 100 In Ohmic/L-mode and H-mode plasma phases both He2+...
Summary Increased intestinal permeability has an important role in metabolic dysregulation. In this cross‐sectional study, we examined whether serum marker zonulin and related pro‐inflammatory molecules were associated with the oral disposition index, a predictor for development of type 2 diabetes, cohort children adolescents overweight obesity. Ninety‐two recruited [Male: 43; 12.7 (2.35) years; BMI SDS: 2.7 (0.96)]. Anthropometric clinical parameters, lipid profile, glucose metabolism...