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Title: Disruption of Current Filaments and Isotropization of the Magnetic Field in Counterstreaming Plasmas

In this paper, we study the stability of current filaments produced by the Weibel, or current filamentation, instability in weakly magnetized counterstreaming plasmas. It is shown that a resonance exists between the current-carrying ions and a longitudinal drift-kink mode that strongly deforms and eventually breaks the current filaments. Analytical estimates of the wavelength, growth rate, and saturation level of the resonant mode are derived and validated by three-dimensional particle-in-cell simulations. Finally and furthermore, self-consistent simulations of counterstreaming plasmas indicate that this drift-kink mode is dominant in the slow down of the flows and in the isotropization of the magnetic field, playing an important role in the formation of collisionless shocks.
Authors:
 [1] ;  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). High Energy Density Science Division; Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). High Energy Density Science Division
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; collisionless shock in plasma; high-energy-density plasmas; kink instability; space & astrophysical plasma; Weibel instability
OSTI Identifier:
1457779

Ruyer, C., and Fiuza, F.. Disruption of Current Filaments and Isotropization of the Magnetic Field in Counterstreaming Plasmas. United States: N. p., Web. doi:10.1103/physrevlett.120.245002.
Ruyer, C., & Fiuza, F.. Disruption of Current Filaments and Isotropization of the Magnetic Field in Counterstreaming Plasmas. United States. doi:10.1103/physrevlett.120.245002.
Ruyer, C., and Fiuza, F.. 2018. "Disruption of Current Filaments and Isotropization of the Magnetic Field in Counterstreaming Plasmas". United States. doi:10.1103/physrevlett.120.245002.
@article{osti_1457779,
title = {Disruption of Current Filaments and Isotropization of the Magnetic Field in Counterstreaming Plasmas},
author = {Ruyer, C. and Fiuza, F.},
abstractNote = {In this paper, we study the stability of current filaments produced by the Weibel, or current filamentation, instability in weakly magnetized counterstreaming plasmas. It is shown that a resonance exists between the current-carrying ions and a longitudinal drift-kink mode that strongly deforms and eventually breaks the current filaments. Analytical estimates of the wavelength, growth rate, and saturation level of the resonant mode are derived and validated by three-dimensional particle-in-cell simulations. Finally and furthermore, self-consistent simulations of counterstreaming plasmas indicate that this drift-kink mode is dominant in the slow down of the flows and in the isotropization of the magnetic field, playing an important role in the formation of collisionless shocks.},
doi = {10.1103/physrevlett.120.245002},
journal = {Physical Review Letters},
number = 24,
volume = 120,
place = {United States},
year = {2018},
month = {6}
}