# Cosmic Rays in Intermittent Magnetic Fields

## TL;DR

This paper investigates how magnetic intermittency in turbulent fields affects cosmic ray diffusion, revealing that intermittency significantly enhances cosmic ray transport compared to non-intermittent fields.

## Contribution

It introduces the first detailed study of cosmic ray propagation in intermittent magnetic fields using test particle simulations, highlighting the impact of intermittency on diffusion.

## Key findings

- Magnetic intermittency increases cosmic ray diffusivity.
- Intermittent fields lead to a correlated random walk behavior.
- Results differ from non-intermittent models with identical spectra.

## Abstract

The propagation of cosmic rays in turbulent magnetic fields is a diffusive process driven by the scattering of the charged particles by random magnetic fluctuations. Such fields are usually highly intermittent, consisting of intense magnetic filaments and ribbons surrounded by weaker, unstructured fluctuations. Studies of cosmic ray propagation have largely overlooked intermittency, instead relying on Gaussian random magnetic fields. Using test particle simulations, we investigate cosmic ray diffusivity in intermittent, dynamo-generated magnetic fields. The results are compared with those obtained from non-intermittent magnetic fields having identical power spectra. The presence of magnetic intermittency significantly enhances cosmic ray diffusion over a wide range of particle energies. We demonstrate that the results can be interpreted in terms of a correlated random walk.