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Paper   IPM / Physic / 7675
School of Physics
  Title:   Relativistic Effects on the Weibel Instability of Circularly Polarized Microwave Produced Plasmas
  Author(s): 
1.  B. Shokri
2.  M. Ghorbanalilu
  Status:   Published
  Journal: Phys. Plasmas
  No.:  12
  Vol.:  11
  Year:  2004
  Pages:   5398-5401
  Supported by:  IPM
  Abstract:
Analyzing the production of a weakly relativistic plasma produced by microwave fields with circular polarization in the adiabatic approximation, the electron distribution function is obtained, which is nonequilibrium and anisotropic. Furthermore, it is shown that the produced plasma is accelerated in the direction of propagating microwave electric fields. The electron velocity in this direction strongly depends on electron origination phase, electric field phase, and amplitude of the microwave electric field. Making use of the dielectric tensor obtained for this plasma, it is shown that the Weibel instability develops due to the anisotropic property of the distribution function. It is shown that the growth rate in the relativistic case is higher than that obtained for the nonrelativistic case by a factor depending on the electric field strength and plasma frequency.

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