NRSI
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Related Articles from SNS
Impact of Cosmic Ray Distribution on the Growth and Saturation of Bell Instability
arXiv:2511.21154v2 Announce Type: replace-cross Abstract: Cosmic rays (CRs) streaming in weakly magnetized plasmas can drive large-amplitude magnetic fluctuations via nonresonant streaming instability (NRSI), or Bell instability. Using one-dimensional kinetic simulations, we investigate how mono-energetic and power-law CR momentum distributions influence the growth and saturation of NRSI. The linear growth is governed solely by the CR current and is largely insensitive to the CR distribution.