• DOI:10.22323/1.358.0483
• Corpus ID: 199676061

Modeling the Saturation of the Bell Instability Using Hybrid Simulations

@article{Zacharegkas2019ModelingTS,
  title={Modeling the Saturation of the Bell Instability Using Hybrid Simulations},
  author={Georgios Zacharegkas and Damiano Caprioli and Colby C. Haggerty},
  journal={Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)},
  year={2019}
}

• G. Zacharegkas, D. Caprioli, C. Haggerty
• Published 22 July 2019
• Physics
• Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

The nonresonant cosmic ray instability, predicted by Bell (2004), is thought to play an important role in the acceleration and confinement of cosmic rays (CRs) close to supernova remnants. Despite its importance, the exact mechanism responsible for the saturation of the instability has not been determined, and there is no first-principle prediction for the amplitude of the saturated magnetic field. Using a survey of self-consistent kinetic hybrid simulations (with kinetic ions and fluid electrons), we study the saturation of the non-resonant streaming instability as a function of the parameters of both the thermal background plasma and the CR population. The strength of the saturated magnetic field has important implications for both CR acceleration in supernova remnants and CR diffusion in the Galaxy.