Non-local transport nature revealed by the research in transient phenomena of toroidal plasma

K Ida - Reviews of Modern Plasma Physics, 2022 - Springer
The non-local transport nature revealed by the research in transient phenomena of toroidal
plasma is reviewed. The following non-local phenomena are described: core temperature …

Advances in physics and applications of 3D magnetic perturbations on the J-TEXT tokamak

N Wang, Y Liang, Y Ding, Z Chen, Z Chen… - Nuclear …, 2022 - iopscience.iop.org
In the last two years, three major technical improvements have been made on J-TEXT in
supporting of the expanded operation regions and diagnostic capabilities.(1) The successful …

Role of zonal flow staircase in electron heat avalanches in KSTAR L-mode plasmas

L Qi, MJ Choi, JM Kwon, TS Hahm - Nuclear Fusion, 2020 - iopscience.iop.org
The first principle nonlinear gyrokinetic numerical simulation successfully reproduces the
experimental observations of non-diffusive large scale avalanching events in a KSTAR MHD …

Global E× B flow pattern formation and saturation

L Qi, MJ Choi, M Leconte, TS Hahm, JM Kwon - Nuclear Fusion, 2022 - iopscience.iop.org
Abstract The E× B flow staircase-like pattern observed in the first principle gyrokinetic
numerical experiments of tokamak fusion plasmas forms due to a nonlinear time delay …

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 …

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 …

Turbulence model reduction by deep learning

RA Heinonen, PH Diamond - Physical Review E, 2020 - APS
A central problem of turbulence theory is to produce a predictive model for turbulent fluxes.
These have profound implications for virtually all aspects of the turbulence dynamics. In …