Lepton-driven Non-resonant Streaming Instability

Siddhartha Gupta; Damiano Caprioli; Colby C Haggerty

doi:10.48550/arxiv.2106.07672

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Lepton-driven Non-resonant Streaming Instability

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Lepton-driven Non-resonant Streaming Instability

Siddhartha Gupta, Damiano Caprioli and Colby C Haggerty

arXiv

06/14/2021

DOI: 10.48550/arxiv.2106.07672

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https://doi.org/10.48550/arxiv.2106.07672View

Preprint (Author's original) This preprint has not been evaluated by subject experts through peer review. Preprints may undergo extensive changes and/or become peer-reviewed journal articles. Open Access

Abstract

A strong super-Alfvénic drift of energetic particles (or cosmic rays, CRs) in a magnetized plasma can amplify the magnetic field significantly through non-resonant streaming instability (NRSI). While the traditional analysis is done for an ion current, here we use kinetic particle-in-cell simulations to study how the NRSI behaves when it is driven by electrons or by a mixture of electrons and positrons. In particular, we characterize growth rate, spectrum, and helicity of the unstable modes, as well the level of magnetic field at saturation. Our results are potentially relevant for several space/astrophysical environments (e.g, electron strahl in the solar wind, at oblique non-relativistic shocks, around pulsar wind nebulae) and also in laboratory experiments.

Physics - High Energy Astrophysical Phenomena

Physics - Plasma Physics

Details

Title: Subtitle: Lepton-driven Non-resonant Streaming Instability
Creators: Siddhartha Gupta
Damiano Caprioli
Colby C Haggerty
Resource Type: Preprint
Publication Details: arXiv
DOI: 10.48550/arxiv.2106.07672
ISSN: 2331-8422
eISSN: 2331-8422
Publisher: arXiv
Language: English
Date posted: 06/14/2021
Academic Unit: Physics and Astronomy
Record Identifier: 9985224314102771

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