In this paper, we review the thermal plasma confinement and transport properties observed
and predicted in low aspect ratio tokamaks, or spherical tokamaks (STs), which can depart …

The current work reports on the significant rise of the fusion triple product in experiments
carried out on the compact spherical tokamak (ST) Globus-M2 with a twofold increase in the …

The mission of the spherical tokamak NSTX-U is to explore the physics that drives core and
pedestal transport and stability at high-and low collisionality, as part of the development of …

Spherical tokamaks (STs) have features that make them a potentially attractive option for
fusion power production compared to conventional tokamaks (CTs) including operation at …

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 …

Plasma transport driven by turbulence ultimately determines the energy confinement
performance of controlled fusion devices regardless of their confinement schemes and …

Three-dimensional nonlinear simulations of Alfvén eigenmodes in the subcyclotron
frequency range show a robust physical stabilizing mechanism via modest off-axis beam …

In this paper, we present clear experimental evidence of core region nonlinear coupling
between (intermediate, small)-scale microturbulence and an magnetohydrodynamics (MHD) …

The mission of the low aspect ratio spherical tokamak NSTX-U is to advance the physics
basis and technical solutions required for optimizing the configuration of next-step steady …

A new model for electron temperature gradient (ETG) modes is developed as a component
of the multi-mode anomalous transport module [Rafiq et al., Phys Plasmas 20, 032506 …