Patrick Diamond

TL;DR: In this paper, direction reversals of intrinsic toroidal rotation have been observed in diverted Alcator C-Mod Ohmic L-mode plasmas following electron density ramps, where the core rotation is directed cocurrent, and reverses to countercurrent following an increase in the density above a certain threshold.

TL;DR: In this paper, a self-similar solution for a galactic cosmic ray (CR) cloud released by a dimmed accelerator strongly deviates from the test-particle result, and the solution has a spectral break at p = p br, where p br satisfies the equation D NL (p br ) ≃ z 2 / t.

TL;DR: In this paper, the kinetic energy transfer between shear flows and the ambient turbulence is investigated in the Experimental Advanced Superconducting Tokamak during the L-H transition as the rate of energy transfer from the turbulence into the shear flow becomes comparable to the energy input rate into the turbulence, the transition into H-mode occurs.

TL;DR: The results suggest that ZFs play an important role in the low-to-high (L-H) plasma confinement transition, and the transfer into ZFs becomes dominant as the heating power is increased.

TL;DR: In this paper, the authors used a gas-puff-imaging based time-delay-estimate velocity inference algorithm, and showed that geodesic-acoustic modes (GAM) are ubiquitous in all I-mode discharges examined to date.