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Lepton-driven Nonresonant Streaming Instability
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DOI：10.3847/1538-4357/ac23cf.png)
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Abstract
En 中文
A strong super-Alfvenic drift of energetic particles (or cosmic rays) in a magnetized plasma can amplify the magnetic field significantly through nonresonant 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 the growth rate, spectrum, and helicity of the unstable modes, as well the level of the magnetic field at saturation. Our results are potentially relevant for several space/astrophysical environments (e.g., electron strahl in the solar wind, at oblique nonrelativistic shocks, around pulsar wind nebulae), and also in laboratory experiments.
Keywords:
DIFFUSIVE SHOCK ACCELERATION
PARTICLE-ACCELERATION
ELECTRON ACCELERATION
MAGNETIC-FIELD
COSMIC-RAYS
AMPLIFICATION
WAVES
DEPENDENCE
PLASMA
Journal
IF:
5.4
Papers:
8.3W
Citations:
32.0W
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Cited Papers
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