Modeling Bell's Non-resonant Cosmic Ray Instability

TL;DR

This paper investigates Bell's non-resonant cosmic ray instability, confirming magnetic field amplification through numerical analysis and providing a detailed physical explanation of the instability's development.

Contribution

It offers a detailed physical understanding of Bell's non-resonant instability and confirms its magnetic field amplification through numerical simulations.

Findings

Significant magnetic field amplification confirmed

Detailed physical picture of instability development provided

Numerical results align with Bell's original findings

Abstract

We have studied the non-resonant streaming instability of charged energetic particles moving through a background plasma, discovered by Bell (2004). We confirm his numerical results regarding a significant magnetic field amplification in the system. A detailed physical picture of the instability development and of the magnetic field evolution is given.