Modeling the Saturation of the Bell Instability Using Hybrid Simulations

Georgios Zacharegkas; Damiano Caprioli; Colby Haggerty

doi:10.22323/1.358.0483

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Modeling the Saturation of the Bell Instability Using Hybrid Simulations

Conference proceeding

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Modeling the Saturation of the Bell Instability Using Hybrid Simulations

Georgios Zacharegkas, Damiano Caprioli and Colby Haggerty

Pos : proceedings of science, Vol.358, 483

07/02/2021

DOI: 10.22323/1.358.0483

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Abstract

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.

Details

Title: Subtitle: Modeling the Saturation of the Bell Instability Using Hybrid Simulations
Creators: Georgios Zacharegkas - University of Chicago
Damiano Caprioli - University of Chicago
Colby Haggerty - University of Chicago
Resource Type: Conference proceeding
Publication Details: Pos : proceedings of science, Vol.358, 483
DOI: 10.22323/1.358.0483
ISSN: 1824-8039
eISSN: 1824-8039
Language: English
Date published: 07/02/2021
Academic Unit: Physics and Astronomy
Record Identifier: 9985224415002771

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