Energetic electron transport in the presence of magnetic perturbations in magnetically confined plasmas

TL;DR

This paper investigates how magnetic perturbations affect energetic electron transport in magnetically confined plasmas, revealing that such transport cannot be modeled as diffusion and proposing an exponential loss model based on 3D simulations.

Contribution

It introduces a new non-diffusive model for energetic electron transport in the presence of magnetic perturbations using test particle simulations.

Findings

Transport is non-diffusive in perturbed magnetic fields.

Proposed model predicts exponential particle loss.

Simulation results support the new transport description.

Abstract

The transport of energetic electrons is sensitive to magnetic perturbations. By using 3D numerical simulation of test particle drift orbits we show that the transport of untrapped electrons through an open region with magnetic perturbations cannot be described by a diffusive process. Based on our test particle simulations, we propose a model that leads to an exponential loss of particles.