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:
-
- Princeton Univ., Princeton, NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Univ. of Maryland, College Park, MD (United States)
- 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}
}
Web of Science
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