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Title: Weibel instability for a streaming electron, counterstreaming e-e, and e-p plasmas with intrinsic temperature anisotropy

The existence of Weibel instability for a streaming electron, counterstreaming electron-electron (e-e), and electron-positron (e-p) plasmas with intrinsic temperature anisotropy is investigated. The temperature anisotropy is included in the directions perpendicular and parallel to the streaming direction. It is shown that the beam mean speed changes the instability mode, for a streaming electron beam, from the classic Weibel to the Weibel-like mode. The analytical and numerical solutions approved that Weibel-like modes are excited for both counterstreaming e-e and e-p plasmas. The growth rates of the instabilities in e-e and e-p plasmas are compared. The growth rate is larger for e-p plasmas if the thermal anisotropy is small and the opposite is true for large thermal anisotropies. The analytical and numerical solutions are in good agreement only in the small parallel temperature and wave number limits, when the instability growth rate increases linearly with normalized wave number kc∕ω{sub p}.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4]
  1. Physics Department, Shahid Beheshti University, G. C., Tehran (Iran, Islamic Republic of)
  2. (Iran, Islamic Republic of)
  3. Physics Department, Azarbaijan Shahid Madani University, Tabriz (Iran, Islamic Republic of)
  4. Laser-Plasma Research Institute, Shahid Beheshti University, G. C., Tehran (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22252900
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; ELECTRON BEAMS; ELECTRONS; INSTABILITY GROWTH RATES; NUMERICAL SOLUTION; PLASMA; POSITRONS