Cumulative effect of the filamentation and Weibel instabilities in counterstreaming thermal plasmas
Abstract
Introducing a thermal particle distribution is important for a realistic investigation of counterstreaming plasmas with finite temperatures. Such counterstreaming thermal plasmas are described by the particle distributions, which include the counterstreams and thermal distribution as well. Two nonrelativistic counterstreams are considered here, with a biMaxwellian thermal anisotropy for each of them. This type of distribution is often expected to be found in both laboratory or cosmic plasmas, and it is able to cumulate the effects of the filamentation and Weibel instability. Comparing with the growth rates of each of these instabilities, the cumulative effect provides larger values, if they are emitted in the same direction. If the thermal anisotropy is negative, which means that Weibel instability develops on a perpendicular direction with respect to the filamentation instability, then their cumulative effect will suppress the instability. In both of these cases, the cumulative effect of the filamentation and Weibel instabilities can modify significantly the effective growth rate of the electromagnetic unstable modes.
 Authors:

 Institut fuer Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, RuhrUniversitaet Bochum, D44780 Bochum (Germany)
 Publication Date:
 OSTI Identifier:
 20860286
 Resource Type:
 Journal Article
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 13; Journal Issue: 10; Other Information: DOI: 10.1063/1.2357047; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070664X
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; DISTRIBUTION; ELECTRON TEMPERATURE; EMISSION; ION TEMPERATURE; PLASMA; PLASMA INSTABILITY; RADIATION TRANSPORT
Citation Formats
Lazar, M, Schlickeiser, R, and Shukla, P K. Cumulative effect of the filamentation and Weibel instabilities in counterstreaming thermal plasmas. United States: N. p., 2006.
Web. doi:10.1063/1.2357047.
Lazar, M, Schlickeiser, R, & Shukla, P K. Cumulative effect of the filamentation and Weibel instabilities in counterstreaming thermal plasmas. United States. doi:10.1063/1.2357047.
Lazar, M, Schlickeiser, R, and Shukla, P K. Sun .
"Cumulative effect of the filamentation and Weibel instabilities in counterstreaming thermal plasmas". United States. doi:10.1063/1.2357047.
@article{osti_20860286,
title = {Cumulative effect of the filamentation and Weibel instabilities in counterstreaming thermal plasmas},
author = {Lazar, M and Schlickeiser, R and Shukla, P K},
abstractNote = {Introducing a thermal particle distribution is important for a realistic investigation of counterstreaming plasmas with finite temperatures. Such counterstreaming thermal plasmas are described by the particle distributions, which include the counterstreams and thermal distribution as well. Two nonrelativistic counterstreams are considered here, with a biMaxwellian thermal anisotropy for each of them. This type of distribution is often expected to be found in both laboratory or cosmic plasmas, and it is able to cumulate the effects of the filamentation and Weibel instability. Comparing with the growth rates of each of these instabilities, the cumulative effect provides larger values, if they are emitted in the same direction. If the thermal anisotropy is negative, which means that Weibel instability develops on a perpendicular direction with respect to the filamentation instability, then their cumulative effect will suppress the instability. In both of these cases, the cumulative effect of the filamentation and Weibel instabilities can modify significantly the effective growth rate of the electromagnetic unstable modes.},
doi = {10.1063/1.2357047},
journal = {Physics of Plasmas},
issn = {1070664X},
number = 10,
volume = 13,
place = {United States},
year = {2006},
month = {10}
}