Turbulent transport regimes in the tokamak boundary and operational limits

@article{Giacomin2022TurbulentTR,
  title={Turbulent transport regimes in the tokamak boundary and operational limits},
  author={M. Giacomin and Paolo Ricci},
  journal={Physics of Plasmas},
  year={2022}
}
Two-fluid, three-dimensional, flux-driven, global, electromagnetic turbulence simulations carried out by using the GBS (Global Braginskii Solver) code are used to identify the main parameters controlling turbulent transport in the tokamak boundary and to delineate an electromagnetic phase space of edge turbulence. Four turbulent transport regimes are identified: (i) a regime of fully developed turbulence appearing at intermediate values of collisionality and β, with turbulence driven by… 

Figures from this paper

References

SHOWING 1-10 OF 52 REFERENCES
Investigation of turbulent transport regimes in the tokamak edge by using two-fluid simulations
The results of flux-driven, two-fluid simulations in single-null configurations are used to investigate the processes determining the turbulent transport in the tokamak edge. Three turbulent
Turbulent regimes in the tokamak scrape-off layer
The non-linear turbulent regimes in the tokamak scrape-off layer (SOL) are identified according to the linear instability responsible for the perpendicular transport. Four regions of the SOL
Three-Dimensional Computation of Drift Alfven Turbulence
A transcollisional, electromagnetic fluid model, incorporating the parallel heat flux as a dependent variable, is constructed to treat electron drift turbulence in the regime of tokamak edge plasmas
Physical mechanism behind and access to the I-mode confinement regime in tokamaks
The I-mode is an attractive confinement regime for future tokamak based fusion reactors. A model is presented which explains the I-mode regime by the reduction of ITG turbulence near the separatrix
Global turbulence simulations of the tokamak edge region with GRILLIX
Turbulent dynamics in the scrape-off layer of magnetic fusion devices is intermittent with large fluctuations in density and pressure. Therefore, a model is required that allows perturbations of
Dynamics of zonal shear collapse with hydrodynamic electrons
This paper presents a theory for the collapse of the edge zonal shear layer, as observed at the density limit at low β. This paper investigates the scaling of the transport and mean profiles with the
Plasma turbulence in the scrape-off layer of tokamak devices
Plasma turbulence is explored in the scrape-off layer of tokamak devices using three-dimensional global two-fluid simulations. Two transport regimes are discussed: one in which the turbulent
First-Principles Density Limit Scaling in Tokamaks Based on Edge Turbulent Transport and Implications for ITER.
A first-principles scaling law, based on turbulent transport considerations, and a multimachine database of density limit discharges from the ASDEX Upgrade, JET, and TCV tokamaks, show that the
High- and low-confinement modes in simple magnetized toroidal plasmas.
Three-field simulations of interchange turbulence are presented for a simple magnetized toroidal plasma with a vertical magnetic field. The simulations show the presence of two turbulent regimes
...
...