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Title: Temperature-dependent Saturation of Weibel-type Instabilities in Counter-streaming Plasmas

Abstract

We present the first 2X2V continuum Vlasov–Maxwell simulations of interpenetrating, unmagnetized plasmas to study the competition between two-stream, Oblique, and filamentation modes in the weakly relativistic regime. We find that after nonlinear saturation of the fastest-growing two-stream and Oblique modes, the effective temperature anisotropy, which drives current filament formation via the secular Weibel instability, has a strong dependence on the internal temperature of the counter-streaming plasmas. The effective temperature anisotropy is significantly more reduced in colder than in hotter plasmas, leading to orders of magnitude lower magnetization for colder plasmas. Here, a strong dependence of the energy conversion efficiency of Weibel-type instabilities on internal beam temperature has implications for determining their contribution to the observed magnetization of many astrophysical and laboratory plasmas.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Princeton Univ., Princeton, NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Univ. of Maryland, College Park, MD (United States)
  4. Princeton Univ., Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1498787
Grant/Contract Number:  
AC02-09CH11466; FA9550-15-1-0193; 80NSSC17K0428; AGS-1622306
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal. Letters (Online); Journal Volume: 872; Journal Issue: 2; Journal ID: ISSN 2041-8213
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; instabilities; magnetic fields; plasmas

Citation Formats

Skoutnev, V., Hakim, A., Juno, J., and TenBarge, J. M. Temperature-dependent Saturation of Weibel-type Instabilities in Counter-streaming Plasmas. United States: N. p., 2019. Web. doi:10.3847/2041-8213/ab0556.
Skoutnev, V., Hakim, A., Juno, J., & TenBarge, J. M. Temperature-dependent Saturation of Weibel-type Instabilities in Counter-streaming Plasmas. United States. https://doi.org/10.3847/2041-8213/ab0556
Skoutnev, V., Hakim, A., Juno, J., and TenBarge, J. M. Wed . "Temperature-dependent Saturation of Weibel-type Instabilities in Counter-streaming Plasmas". United States. https://doi.org/10.3847/2041-8213/ab0556. https://www.osti.gov/servlets/purl/1498787.
@article{osti_1498787,
title = {Temperature-dependent Saturation of Weibel-type Instabilities in Counter-streaming Plasmas},
author = {Skoutnev, V. and Hakim, A. and Juno, J. and TenBarge, J. M.},
abstractNote = {We present the first 2X2V continuum Vlasov–Maxwell simulations of interpenetrating, unmagnetized plasmas to study the competition between two-stream, Oblique, and filamentation modes in the weakly relativistic regime. We find that after nonlinear saturation of the fastest-growing two-stream and Oblique modes, the effective temperature anisotropy, which drives current filament formation via the secular Weibel instability, has a strong dependence on the internal temperature of the counter-streaming plasmas. The effective temperature anisotropy is significantly more reduced in colder than in hotter plasmas, leading to orders of magnitude lower magnetization for colder plasmas. Here, a strong dependence of the energy conversion efficiency of Weibel-type instabilities on internal beam temperature has implications for determining their contribution to the observed magnetization of many astrophysical and laboratory plasmas.},
doi = {10.3847/2041-8213/ab0556},
journal = {The Astrophysical Journal. Letters (Online)},
number = 2,
volume = 872,
place = {United States},
year = {Wed Feb 20 00:00:00 EST 2019},
month = {Wed Feb 20 00:00:00 EST 2019}
}

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Works referencing / citing this record:

ViDA: a Vlasov-DArwin solver for plasma physics at electron scales
text, January 2019