Spherical tokamaks (STs) have been shown to possess properties desirable for a fusion
power plant such as achieving high plasma β and having increased vertical stability. To …

In a series of discharges on the DIII-D tokamak, fast vertical plasma jogs are used to induce
current perturbations in the steep gradient region of the H-mode edge. These current …

In this study, gyrokinetic simulations are used to study pedestal fluctuations for DIII-D
discharge 174082 using the GENE code. Nonlinear local simulations indicate that electron …

First nonlinear gyrokinetic simulations of microtearing modes in the core of a MAST case are
performed on two surfaces of the high-collisionality discharge used in Valovič et al (2011 …

We report on the first direct comparisons of microtearing turbulence simulations to
experimental measurements in a representative high bootstrap current fraction (f BS) …

Modeling tokamaks enables a deeper understanding of how to run and control our
experiments and how to design stable and reliable reactors. We model tokamaks to …

The theory, development, and validation of reduced quasilinear models of gyrokinetic
turbulent transport in the closed flux surface core of tokamaks is reviewed. In combination …

A large-scale validation exercise was conducted to assess the multi-mode model (MMM)
anomalous transport model in the integrated modeling code TRANSP. The validation …

Microtearing mode (MTM) real frequency, growth rate, magnetic fluctuation amplitude, and
resulting electron thermal transport are studied in systematic NSTX scans of relevant plasma …

Electromagnetic (EM) instabilities and turbulence driven by the electron-temperature
gradient (ETG) are considered in a local slab model of a tokamak-like plasma. Derived in a …