Christopher Holland

TL;DR: The framework made possible the design and automation of a workflow that enables self-consistent predictions of kinetic profiles and the plasma equilibrium, and it was found that the feedback between the transport fluxes and plasma equilibrium can significantly affect the kinetic profiles predictions.

TL;DR: In this paper, a steady-state iteration scheme was proposed for direct gyrokinetic and neoclassical simulations. But the method is not suitable for high computational cost, such as the evaluation of thousands of individual transport fluxes (local transport models calculate the energy and particle fluxes across a specified flux surface).

TL;DR: The SPARC tokamak is a critical next step towards commercial fusion energy as discussed by the authors, and it is designed as a high-field high-energy particle accelerator relevant to fusion power plants.

TL;DR: In this article, the authors implemented synthetic diagnostics that model physical beam emission spectroscopy and correlation electron cyclotron emission diagnostics on the DIII-D tokamak and found good agreement between experiment and simulation in both energy flows and fluctuation levels measured by both diagnostics.

TL;DR: The nonlinear coupling between small scale high-frequency turbulence and larger scale lower-frequency fluctuations increases transiently in transitions to improved confinement in the DIII-D tokamak.