Lagrangian features of turbulent transport in tokamak plasmas

2025/09/04 by Palade, D. I.
#Chaotic Dynamics (nlin.CD) #Data Analysis #FOS: Physical sciences #Plasma Physics (physics.plasm-ph) #Statistics and Probability (physics.data-an)

paper · doi:10.48550/arxiv.2509.04132

Abstract

This study investigates the Lagrangian properties of ion turbulent transport driven by drift-type turbulence in tokamak plasmas. Despite the compressible and inhomogeneous nature of Eulerian gyrocenter drifts, numerical simulations with the T3ST code reveal approximate ergodicity, stationarity, and time-symmetry. These characteristics are attributed to broad initial phase-space distributions that support ergodic mixing. Moreover, relatively minor constraints on the initial distributions are found to have negligible effects on transport levels.

Citations

• T3ST code: Turbulent Transport in Tokamaks via Stochastic Trajectories
• Neural networks for turbulent transport prediction in a simplified model of tokamak plasmas
• Scaling laws of two-dimensional incompressible turbulent transport
• Fast generation of Gaussian random fields for direct numerical simulations of stochastic transport

Related

• Effects of magnetic drifts on ion transport in turbulent tokamak plasmas
• T3ST code: Turbulent Transport in Tokamaks via Stochastic Trajectories
• Drift wave versus interchange turbulence in tokamak geometry: Linear versus nonlinear mode structure
• On the edge turbulence in a DTT-like tokamak plasma
• Fluctuation driven transport and stationary profiles