A5077413416- Magnetic confinement fusion research
- Fusion materials and technologies
- Radiative Heat Transfer Studies
- Infrared Target Detection Methodologies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Calibration and Measurement Techniques
- Laser-Plasma Interactions and Diagnostics
- Building Energy and Comfort Optimization
- Computer Graphics and Visualization Techniques
- Surface Roughness and Optical Measurements
- Superconducting Materials and Applications
- Geophysical Methods and Applications
- Wind and Air Flow Studies
- Nuclear Materials and Properties
- Optical measurement and interference techniques
- Advanced Image Fusion Techniques
- Urban Heat Island Mitigation
- Advanced Measurement and Metrology Techniques
- Image Enhancement Techniques
- Thermography and Photoacoustic Techniques
CEA Cadarache
2021-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2021-2024
Institut Universitaire des Systèmes Thermiques Industriels
2020-2022
Centre National de la Recherche Scientifique
2020-2022
Institut Pprime
2017-2022
École Nationale Supérieure de Mécanique et d'Aérotechnique
2022
Université de Poitiers
2022
Aix-Marseille Université
2020-2022
Institut de Recherche sur la Fusion par Confinement Magnétique
2022
Château Gombert
2020-2021
Abstract ITER will operate with a tungsten divertor, material featuring surface morphology changes when exposed to helium plasmas, in particular the formation of so called fuzz under specific conditions. Investigating interactions between plasma facing components and plasmas tokamak environment is therefore key point consolidate predictions for divertor performance lifetime. To this end, dedicated campaign was performed full WEST tokamak, cumulating ∼2000 s repetitive L mode discharges. It...
Abstract This paper summarizes the emissivity measurements performed on plasma-facing units (PFU) of WEST lower divertor during first phase running with a mix actively cooled ITER-like PFUs made bulk tungsten (W) and inertially graphite coating tungsten. In situ assessments laboratory after removing W-coated ITER-grade from device are shown. The exhibit complex pattern strong variation as function space time mainly explained magnetic equilibrium (strike point location) well plasma...
Infra-red (IR) thermography is a widely used tool in fusion devices to monitor and protect the plasma-facing component (PFC) from excessive heat loads. However, with use of all-metal walls devices, deriving surface temperature IR measurements has become more challenging. In this paper, an overview infra-red metallic tokamaks WEST ASDEX Upgrade (AUG) reported techniques carried out modeling experimental fields deal radiative fully reflective environment are presented. Experimental...
In this paper, a method was developed to estimate in-situ the emissivity of W-coated graphite divertor tiles in WEST tokamak. This is based on double heating and take advantages temperature increase after successive plasma experiments due inertial behavior facing components. Photonic calculations have been used disentangle emitted reflected parts measured radiances from infrared system. The uncertainty as well robustness investigated thanks wide IR thermocouple coverage divertor. results...
In metallic fusion devices, parasitic light originating from multiple reflections on the wall is a major problem for interpretation of optical diagnostics. Strong stray affects several diagnostics in ITER. One possibility to cope with this reflected use photonic simulation, which can accurately predict behavior within complex 3D geometry. A prerequisite get good description reflection model, represented by Bidirectional Reflectance Distribution Function (BRDF), based measurements in-vessel...
This paper presents the measurement of bidirectional reflectance distribution function tungsten (W) samples and resulting reflection models in nuclear fusion device WEST (tokamak). For this, an experimental gonio-spectrophotometer was developed to fully characterize material’s optical thermal-radiative properties metallic with different roughnesses. Ray-tracing photonic simulation then carried out predict photon behavior a environment as measurement. Low emissivity (0.1 at 4 μm) highly...
Infrared (IR) thermography system is a key diagnostic in fusion devices to monitor the Plasma Facing Components. Nevertheless, both qualitative and quantitative analysis (i.e. hot spot detection surface temperature measurement) are challenging due presence of disturbance phenomena like variable emissivity multiple reflections fully metallic environment. Through comparison with experimental IR measurements, simulation an essential tool for anticipating, quantifying analysing effects various...
Infrared (IR) imaging systems are common diagnostics for monitoring in-vessel components in thermonuclear fusion devices (tokamak). Nevertheless, IR interpretation fully metallic environment is complex due to the presence of multiple reflections and change optical properties materials as operation progresses. This causes high errors on surface temperature measurement which a risk machine protection. The paper presents first demonstration simulation-assisted learning method retrieving from...
Radiative heat transfer in buildings can be determined through the resolution of radiosity equations. This technique requires evaluation geometric couplings between elements scene called view factors. Obtaining them is particularly challenging, especially when obstructions are involved. In addition, system to solved cumbersome, since each surface likely interact with all others and number nodes involved description a complex large. We present solution method that refines mesh while...