F. Militello
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View article: STORM modelling of scrape-off layer filament behaviour with hot ions
STORM modelling of scrape-off layer filament behaviour with hot ions Open
Advances in edge and scrape-off layer diagnostics have shown that often the ion temperature is higher than the electron temperature in scrape-off layer filaments. We have therefore extended the STORM model beyond the cold ion limit commonl…
View article: The impact of non-local parallel electron transport on plasma-impurity reaction rates in tokamak scrape-off layer plasmas
The impact of non-local parallel electron transport on plasma-impurity reaction rates in tokamak scrape-off layer plasmas Open
Plasma-impurity reaction rates are a crucial part of modelling tokamak scrape-off layer (SOL) plasmas. To avoid calculating the full set of rates for the large number of important processes involved, a set of effective rates are typically …
View article: The impact of non-local parallel electron transport on plasma-impurity reaction rates in tokamak scrape-off layer plasmas
The impact of non-local parallel electron transport on plasma-impurity reaction rates in tokamak scrape-off layer plasmas Open
Plasma-impurity reaction rates are a crucial part of modelling tokamak scrape-off layer (SOL) plasmas. To avoid calculating the full set of rates for the large number of important processes involved, a set of effective rates are typically …
View article: The effect of divertor particle sources on scrape-off-layer turbulence
The effect of divertor particle sources on scrape-off-layer turbulence Open
Tokamak edge turbulence is crucial for the cross-field transport of particles and energy away from the separatrix. A better understanding of what affects the turbulence helps to control the heat flux to the divertor targets and the wall. O…
View article: ReMKiT1D - A framework for building reactive multi-fluid models of the tokamak scrape-off layer with coupled electron kinetics in 1D
ReMKiT1D - A framework for building reactive multi-fluid models of the tokamak scrape-off layer with coupled electron kinetics in 1D Open
In this manuscript we present the recently developed flexible framework for building both fluid and electron kinetic models of the tokamak Scrape-Off Layer in 1D - ReMKiT1D (Reactive Multi-fluid and Kinetic Transport in 1D). The framework …
View article: On the transport of tracer particles in two-dimensional plasma edge turbulence
On the transport of tracer particles in two-dimensional plasma edge turbulence Open
Shear flows in turbulent fluids have been known to act as transport barriers for some time. An example of a shear flow generating mechanism is the E×B shear in plasma, which has a substantial impact on the dynamics of magnetic confinement …
View article: ReMKiT1D -- A framework for building reactive multi-fluid models of the tokamak Scrape-Off Layer with coupled electron kinetics in 1D
ReMKiT1D -- A framework for building reactive multi-fluid models of the tokamak Scrape-Off Layer with coupled electron kinetics in 1D Open
In this manuscript we present the recently developed flexible framework for building both fluid and electron kinetic models of the tokamak Scrape-Off Layer in 1D - ReMKiT1D (Reactive Multi-fluid and Kinetic Transport in 1D). The framework …
View article: Scaling laws for electron kinetic effects in tokamak scrape-off layer plasmas
Scaling laws for electron kinetic effects in tokamak scrape-off layer plasmas Open
Tokamak edge (scrape-off layer (SOL)) plasmas can exhibit non-local transport in the direction parallel to the magnetic field due to steep temperature gradients. This effect along with its consequences has been explored at equilibrium for …
View article: A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U
A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U Open
The 2D scrape-off-layer turbulence code (nSOLT), which includes 1D kinetic neutral–plasma interactions, is applied to study effects of neutral recycling on plasma turbulence for parameters illustrative of the MAST-U divertor region. Neutra…
View article: A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U
A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U Open
The 2D scrape-off-layer turbulence code (nSOLT), which includes 1D Boltzmann neutral-plasma interactions, is applied to study effects of neutral recycling on plasma turbulence for parameters illustrative of the MAST-U divertor region.
View article: A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U
A reduced-model (nSOLT) simulation of neutral recycling effects on plasma turbulence in the divertor region of MAST-U Open
The 2D scrape-off-layer turbulence code (nSOLT), which includes 1D Boltzmann neutral-plasma interactions, is applied to study effects of neutral recycling on plasma turbulence for parameters illustrative of the MAST-U divertor region.
View article: Scaling laws for electron kinetic effects in tokamak scrape-off layer plasmas
Scaling laws for electron kinetic effects in tokamak scrape-off layer plasmas Open
Tokamak edge (scrape-off layer) plasmas can exhibit non-local transport in the direction parallel to the magnetic field due to steep temperature gradients. This effect along with its consequences has been explored at equilibrium for a rang…
View article: Comparing two- and three-dimensional models of scrape-off layer turbulent transport
Comparing two- and three-dimensional models of scrape-off layer turbulent transport Open
There exists a large body of previous work using reduced two-dimensional models of the scrape-off layer (SOL), which model fluctuations in the drift-plane but approximate parallel transport with effective loss terms. Full size three-dimens…
View article: The physics of turbulence localised to the tokamak divertor volume
The physics of turbulence localised to the tokamak divertor volume Open
Fusion power plant designs based on magnetic confinement, such as the tokamak design, offer a promising route to sustainable fusion power but require robust exhaust solutions capable of tolerating intense heat and particle fluxes from the …
View article: Investigation of the role of hydrogen molecules in 1D simulation of divertor detachment
Investigation of the role of hydrogen molecules in 1D simulation of divertor detachment Open
The role of neutral and charged hydrogenic molecules in detached regimes of tokamak plasmas is investigated using a simplified 1D numerical model. Using MAST Upgrade like conditions, simulations are implemented to study the rollover of tar…
View article: Towards a fusion power plant: integration of physics and technology
Towards a fusion power plant: integration of physics and technology Open
A fusion power plant can only exist with physics and technology acting in synchrony, over space (angstroms to tens of metres) and time (femtoseconds to decades). Recent experience with the European DEMO programme has shown how important it…
View article: Benefits and Challenges of Advanced Divertor Configurations in DEMO
Benefits and Challenges of Advanced Divertor Configurations in DEMO Open
The divertor design and configuration define the power exhaust capabilities of DEMO, and act as a major design driver. They set a number of requirements on the tokamak layout, including port sizes, poloidal field coil positions, and size o…
View article: Predictions of radiation pattern and in–out asymmetries in the DEMO scrape-off layer using fluid neutrals
Predictions of radiation pattern and in–out asymmetries in the DEMO scrape-off layer using fluid neutrals Open
Strongly radiating and detached high-power discharges in present-day full-metal tokamaks have a characteristic radiation pattern involving condensation of radiation near the X-point, with significant radiative losses above the X-point. In …
View article: Validation of edge turbulence codes in a magnetic X-point scenario in TORPEX
Validation of edge turbulence codes in a magnetic X-point scenario in TORPEX Open
Transport processes around the magnetic X-point of tokamaks, such as turbulence and mean-field drifts, are scarcely understood. The assessment of the capability of turbulence codes to quantitatively reproduce these dynamics has been hamper…
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: Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer
Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer Open
Using the 1D kinetic electron code SOL-KiT, simulations of the divertor tokamak scrape-off layer were carried out to explore the presence of kinetic effects in energy transfer between the ions and electrons. During steady-state conditions,…
View article: Comparison of private flux region instability in conventional and super-X divertor configurations
Comparison of private flux region instability in conventional and super-X divertor configurations Open
Understanding turbulence in the divertor leg of tokamaks is essential to predict the heat deposition profile on the divertor plate. This in turn is important for evaluating advanced divertor configurations, such as the super-X divertor. Wi…
View article: Reduced-model scrape-off layer turbulence (nSOLT) simulations comparing three fueling scenarios
Reduced-model scrape-off layer turbulence (nSOLT) simulations comparing three fueling scenarios Open
The 2D scrape-off-layer turbulence code (nSOLT) includes 1D Boltzmann neutral–plasma interactions, a model of divertor recycling (introduced here), and a fixed source of plasma concentrated at the core-side boundary. Three fueling methods …
View article: The operational space for divertor power exhaust in DEMO with a super-X divertor
The operational space for divertor power exhaust in DEMO with a super-X divertor Open
SOLPS-ITER simulations of the European DEMO reactor with a Super-X divertor, which has larger major radius at the outer target and increased connection length, show an increased operational space for divertor power exhaust compared to the …
View article: The role of edge plasma parameters in H-mode density limit on the JET-ILW
The role of edge plasma parameters in H-mode density limit on the JET-ILW Open
A study of a dataset of JET H-mode plasma with the Be/W ITER-like wall (JET-ILW) shows that reaching the edge MHD ballooning limit leads to confinement degradation. However, unlike JET plasmas with a carbon wall (JET-C), the JET-ILW plasma…
View article: Edge turbulence in ISTTOK: a multi-code fluid validation
Edge turbulence in ISTTOK: a multi-code fluid validation Open
Fluid models used to study the edge plasma region need to be benchmarked against similar conditions given that models can strongly differ in complexity and therefore the results they produce. Via this validation study undertaken through th…