D. Borodin
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View article: Demonstration of Super-X divertor exhaust control for transient heat load management in compact fusion reactors
Demonstration of Super-X divertor exhaust control for transient heat load management in compact fusion reactors Open
Nuclear fusion could offer clean, abundant energy. However, managing the power exhausted from the core fusion plasma towards the reactor wall remains a major challenge. This is compounded in emerging compact reactor designs promising more …
View article: Hydrogen isotopic ratio by residual gas analysis during the JET DT campaigns
Hydrogen isotopic ratio by residual gas analysis during the JET DT campaigns Open
The analysis of hydrogen isotope content is crucial for understanding the operation of fusion devices. Hydrogen isotopic analysis in the core and plasma edge is conducted through neutron and spectroscopic diagnostics. In the case of exhaus…
View article: Overview of the first Wendelstein 7-X long pulse campaign with fully water-cooled plasma facing components
Overview of the first Wendelstein 7-X long pulse campaign with fully water-cooled plasma facing components Open
After a long device enhancement phase, scientific operation resumed in 2022. The main new device components are the water cooling of all plasma facing components and the new water-cooled high heat flux divertor units. Water cooling allowed…
View article: Long-lived magnetization in an atomic spin chain tuned to a diabolic point
Long-lived magnetization in an atomic spin chain tuned to a diabolic point Open
Scaling magnets down to where quantum size effects become prominent triggers quantum tunneling of magnetization (QTM), profoundly influencing magnetization dynamics. Measuring magnetization switching in an Fe atomic chain under a carefully…
View article: Modeling of plasma facing component erosion, impurity migration, dust transport and melting processes at JET-ILW
Modeling of plasma facing component erosion, impurity migration, dust transport and melting processes at JET-ILW Open
An overview of the modeling approaches, validation methods and recent main results of analysis and modeling activities related to the plasma-surface interaction (PSI) in JET-ILW experiments, including the recent H/D/T campaigns, is present…
View article: Validation of the ERO2.0 code using W7-X and JET experiments and predictions for ITER operation
Validation of the ERO2.0 code using W7-X and JET experiments and predictions for ITER operation Open
The paper provides an overview of recent modelling of global material erosion and deposition in the fusion devices Wendelstein 7-X (W7-X), JET and ITER using the Monte-Carlo code ERO2.0. For validating the modelling tool in a three-dimensi…
View article: Internal energy distributions of BeH, BeD, and BeT molecules created during chemically assisted physical sputtering in JET tokamak plasma
Internal energy distributions of BeH, BeD, and BeT molecules created during chemically assisted physical sputtering in JET tokamak plasma Open
We present here the results of the spectroscopic analysis of the high-resolution visible spectra of beryllium hydride and its isotopologues (BeH, BeD, and BeT), produced during plasma–surface interactions during limiter and divertor JET-IL…
View article: Overview of the EUROfusion Tokamak Exploitation programme in support of ITER and DEMO
Overview of the EUROfusion Tokamak Exploitation programme in support of ITER and DEMO Open
Within the 9th European Framework programme, since 2021 EUROfusion is operating five tokamaks under the auspices of a single Task Force called ‘Tokamak Exploitation’. The goal is to benefit from the complementary capabilities of each machi…
View article: Business model analysis of small-scale spacecraft projects
Business model analysis of small-scale spacecraft projects Open
The use of data combined from various sources, including satellite data, expands the possibilities of predictive management of enterprises and organizations of all spheres of activity, contributing to the growth of economic entities’ effic…
View article: Isotope removal experiment in JET-ILW in view of T-removal after the 2nd DT campaign at JET
Isotope removal experiment in JET-ILW in view of T-removal after the 2nd DT campaign at JET Open
A sequence of fuel recovery methods was tested in JET, equipped with the ITER-like beryllium main chamber wall and tungsten divertor, to reduce the plasma deuterium concentration to less than 1% in preparation for operation with tritium. T…
View article: Beryllium erosion and redeposition in ITER H, He and D–T discharges
Beryllium erosion and redeposition in ITER H, He and D–T discharges Open
The Monte-Carlo code ERO2.0 was used to simulate steady-state erosion and transport of beryllium (Be) in the ITER main chamber. Various plasma scenarios were tested, including a variation of the main species (hydrogen, deuterium, helium), …
View article: EUROfusion-theory and advanced simulation coordination (E-TASC): programme and the role of high performance computing
EUROfusion-theory and advanced simulation coordination (E-TASC): programme and the role of high performance computing Open
This paper is a written summary of an overview oral presentation given at the 1st Spanish Fusion High Performance Computer (HPC) Workshop that took place on the 27 November 2020 as an online event. Given that over the next few years ITER 2…
View article: Fluid, kinetic and hybrid approaches for neutral and trace ion edge transport modelling in fusion devices
Fluid, kinetic and hybrid approaches for neutral and trace ion edge transport modelling in fusion devices Open
Neutral gas physics and neutral interactions with the plasma are key aspects of edge plasma and divertor physics in a fusion reactor including the detachment phenomenon often seen as key to dealing with the power exhaust challenges. A full…
View article: Understanding tungsten erosion during inter/intra-ELM periods in He-dominated JET-ILW plasmas
Understanding tungsten erosion during inter/intra-ELM periods in He-dominated JET-ILW plasmas Open
Tungsten erosion was quantified during inter/intra-ELM periods in He-dominated JET-ILW plasmas by optical emission spectroscopy. The intra-ELM tungsten sputtering in helium plasmas, which dominates the total W source, prevails by a factor …
View article: Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X
Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X Open
We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 1…
View article: Simulation of Impurity Transport and Deposition in the Closed Helical Divertor in the Large Helical Device
Simulation of Impurity Transport and Deposition in the Closed Helical Divertor in the Large Helical Device Open
Long pulse discharges in the Large Helical Device have often been interrupted by large amounts of dust particle emission from the divertor region caused by the exfoliation of carbon-rich mixed material deposition layers. The plasma wall in…
View article: A sensitivity analysis of numerical predictions for beryllium erosion and migration in ITER
A sensitivity analysis of numerical predictions for beryllium erosion and migration in ITER Open
The present study addresses the uncertainties that affect the recently performed predictions of beryllium (Be) erosion and migration in ITER using the Monte-Carlo code ERO2.0. The focus of the study is a D–T baseline discharge with fusion …
View article: Erosion and screening of tungsten during inter/intra-ELM periods in the JET-ILW divertor
Erosion and screening of tungsten during inter/intra-ELM periods in the JET-ILW divertor Open
Intra-ELM tungsten sources, which dominate the total W source, are quantified in the inner and outer divertor of JET-ILW. The amount of the sputtered W atoms for individual ELMs demonstrates a clear dependence on the ELM frequency. It decr…
View article: Measuring Transient Reaction Rates\nfrom Nonstationary Catalysts
Measuring Transient Reaction Rates\nfrom Nonstationary Catalysts Open
Up\nto now, methods\nfor measuring rates of reactions on catalysts required long measurement\ntimes involving signal averaging over many experiments. This imposed\na requirement that the catalyst return to its original state at the\nend of…
View article: First application of the massively-parallel Monte Carlo code ERO2.0 for plasma-wall interaction and 3D local impurity transport at JET ILW
First application of the massively-parallel Monte Carlo code ERO2.0 for plasma-wall interaction and 3D local impurity transport at JET ILW Open
Here, estimating erosion for plasma-facing components (PFCs) is one of the key issues for ITER. Effective sputter yields can be obtained experimentally e.g. by estimating flux ratios with S/XB ratios. The interpretation of such experiments…
View article: ERO2.0 modelling of the effects of surface roughness on molybdenum erosion and redeposition in the PSI-2 linear plasma device
ERO2.0 modelling of the effects of surface roughness on molybdenum erosion and redeposition in the PSI-2 linear plasma device Open
The surface morphology of plasma-facing components (PFCs) and its evolution during plasma irradiation has been shown to have a significant effect on the erosion and subsequent transport of sputtered particles in plasma. This in turn can in…
View article: First Monte‐Carlo modelling of global beryllium migration in ITER using ERO2.0
First Monte‐Carlo modelling of global beryllium migration in ITER using ERO2.0 Open
ERO2.0 is a recently developed Monte‐Carlo code for modelling global erosion and redeposition in fusion devices. We report here on the code's application to ITER for studying the erosion of the beryllium (Be) first wall armour under burnin…
View article: Wall conditioning in fusion devices with superconducting coils
Wall conditioning in fusion devices with superconducting coils Open
Wall conditioning is essential in tokamak and stellarator research to achieve plasma performance and reproducibility. This paper presents an overview of recent conditioning results, both from experiments in present devices and modelling, i…
View article: Erosion, screening, and migration of tungsten in the JET divertor
Erosion, screening, and migration of tungsten in the JET divertor Open
The erosion of tungsten (W), induced by the bombardment of plasma and impurity particles, determines the lifetime of plasma-facing components as well as impacting on plasma performance by the influx of W into the confined region. The scree…