Signatures of non-Markovian turbulent transport in Reversed Field Pinch plasmas

TL;DR

This paper investigates non-Markovian turbulent transport in Reversed Field Pinch plasmas, demonstrating anomalous transport behavior that deviates from standard diffusion, and proposes a CTRW-based model with exponential memory functions.

Contribution

It introduces a novel non-Markovian transport model for RFP plasmas using CTRW formalism, capturing anomalous transport phenomena.

Findings

Transport is anomalous and cannot be described by standard diffusion.

A CTRW-based model with exponential memory functions fits numerical data well.

The study provides a quantitative framework for non-Markovian plasma transport.

Abstract

Transport of field lines is studied for a realistic model of magnetic field configuration in a Reversed Field Pinch. It is shown that transport is anomalous, i.e., it cannot be described within the standard diffusive paradigm. To fit numerical results we present a transport model based upon the Continuous Time Random Walk formalism. Fairly good quantitative agreement appears for exponential memory functions.