Geodesic acoustic modes (GAMs) are ubiquitous oscillatory flow phenomena observed in
toroidal magnetic confinement fusion plasmas, such as tokamaks and stellarators. They are …

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 …

ABSTRACT A major scientific success story of magnetic fusion research in the past several
decades has been the theoretical development and experimental testing of the process of …

Recent US fusion development strategy reports all recommend that the US should pursue
innovative science and technology to enable construction of a fusion pilot plant (FPP) that …

This paper reviews current understanding of key physics elements that control the H-mode
pedestal structure, which exists at the boundary of magnetically confined plasmas. The …

Enhanced particle transport events are discovered and analyzed as the density limit of the J-
TEXT tokamak is approached. Edge shear layer collapse is observed and the ratio of …

This work combines experimental observations from the ASDEX Upgrade tokamak with
related gyrokinetic simulations of the turbulence moving from L-mode toward, and beyond …

We present a gyrokinetic analysis of the vortex flow evolution in a magnetic island in
collisionless tokamak plasmas. In a short term ω¯ D t< 1, where ω¯ D is the secular …

We present a gyrokinetic theory of self-generated E× B vortex flows in a magnetic island in a
collisionless tokamak plasma with a background vortex flow. We find that the long-term …

We use beam tracing—implemented with a newly-written code, Scotty—and the reciprocity
theorem to derive a model for the linear backscattered power of the Doppler backscattering …