The stellarator is a type of fusion energy device that—if properly designed—could provide
clean, safe, and abundant energy to the grid. To generate this energy, a stellarator must …

The efficient operation of a tokamak is limited by several constraints, such as the transition to
high confinement or the density limits occurring in both confinement regimes. These …

The physical foundations of the dissipation of energy and the associated heating in weakly
collisional plasmas are poorly understood. Here, we compare and contrast several …

Edge turbulence codes will play a key role in the interpretation of ITER data and for reliable
predictions of EU-DEMO. At present, such codes are not yet capable of routine simulations …

This paper reports on the development of reduced models for electron temperature gradient
(ETG) driven transport in the pedestal. Model development is enabled by a set of 61 …

Abstract Theory-based scaling laws of the near and far scrape-off layer (SOL) widths are
analytically derived for L-mode diverted tokamak discharges by using a two-fluid model. The …

We present algorithms and results from Gkeyll, a full-f continuum, electromagnetic
gyrokinetic code, designed to study turbulence in the edge region of fusion devices. The …

Understanding and predicting turbulence in the edge and scrape-off layer (SOL) is critical for
the optimization of magnetic confinement fusion devices. While there has been progress …

The simplified δf mixed-variable/pullback electromagnetic simulation algorithm implemented
in XGC for core plasma simulations by Cole et al.[Phys. Plasmas 28, 034501 (2021)] has …

A gyrokinetic model is presented that can properly describe large and small amplitude
electromagnetic fluctuations occurring on scale lengths ranging from the electron Larmor …