Mesoscopic transport events and the breakdown of Fick's law for turbulent fluxes

TS Hahm, PH Diamond - Journal of the Korean Physical Society, 2018 - Springer
This paper presents a pedagogical review of the physics of mesoscopic transport events and
their role in the breakdown of Fick's Law for turbulent transport in magnetically confined …

On how fast ions enhance the regulation of drift wave turbulence by zonal flows

GJ Choi, PH Diamond, TS Hahm - Nuclear Fusion, 2023 - iopscience.iop.org
This paper presents a mechanism for enhanced regulation of drift wave turbulence by zonal
flows in the presence of a fast ion population. It demonstrates that dilution effects due to the …

Characteristics of trapped electron transport, zonal flow staircase, turbulence fluctuation spectra in elongated tokamak plasmas

L Qi, JM Kwon, TS Hahm, S Yi, MJ Choi - Nuclear Fusion, 2019 - iopscience.iop.org
The effects of plasma elongation on trapped electron mode (TEM) driven turbulence and
transport are investigated with detailed analyses of fluctuation, zonal flow and zonal …

Staircase formation by resonant and non-resonant transport of potential vorticity

Q Yan, PH Diamond - Nuclear Fusion, 2022 - iopscience.iop.org
Abstract The E× B staircase is a quasi-periodic pattern of pressure profile corrugations. In
this work, we present a new mechanism for E× B staircase formation that involves resonant …

Wave trapping and E× B staircases

X Garbet, O Panico, R Varennes, C Gillot… - Physics of …, 2021 - pubs.aip.org
A model of E× B staircases is proposed based on a wave kinetic equation coupled to a
poloidal momentum equation. A staircase pattern is idealized as a periodic radial structure …

Self-consistent model of the plasma staircase and nonlinear Schrödinger equation with subquadratic power nonlinearity

AV Milovanov, JJ Rasmussen, G Dif-Pradalier - Physical Review E, 2021 - APS
A new basis has been found for the theory of self-organization of transport avalanches and
jet zonal flows in L-mode tokamak plasma, the so-called “plasma staircase”[Dif-Pradalier …

Scale selection and feedback loops for patterns in drift wave-zonal flow turbulence

W Guo, PH Diamond, DW Hughes… - Plasma Physics and …, 2019 - iopscience.iop.org
The scale selection and feedback loops for the formation and sustainment of a mesoscopic
staircase profile structure are investigated for drift wave-zonal flow turbulence. A mean field …

Effects of light impurities on zonal flow activities and turbulent thermal transport

J Seo, H Jhang, JM Kwon - Physics of Plasmas, 2022 - pubs.aip.org
Nonlinear effects of light impurities on the zonal flow activities and electrostatic ITG (ion
temperature gradient) mode are investigated with gyrokinetic simulations. For the …

Limit cycle oscillations, response time, and the time-dependent solution to the Lotka–Volterra predator–prey model

M Leconte, P Masson, L Qi - Physics of Plasmas, 2022 - pubs.aip.org
In this work, the time-dependent solution for the Lotka–Volterra predator–prey model is
derived with the help of the Lambert W function. This allows an exact analytical expression …

Development and long-term evolution of density staircases in stirred stratified turbulence

P Pružina, DW Hughes, SS Pegler - Physical Review Fluids, 2022 - APS
We formulate and analyze a model describing the development and evolution of density
staircases in stratified turbulence, using it to investigate the long-term evolution and merger …