0 Ju l 2 00 4 Weibel instability on weakly relativistic produced plasma by circular polarization microwave electric field ∗

Analyzing the production of weakly relativistic plasma produced by microwave fields with circular polarization the electron distribution function is obtained to be non-equilibrium and anisotropic. Furthermore, it is shown that produced plasma is accelerated on the direction of propagation of microwave electric fields. The electron velocity on this direction strongly depends on electron origination phase, electric field phase, and amplitude of microwave electric field. Making use of the dielectric tensor obtained for this plasma, it is shown that the wiebel instability develops due to the anisotrpic property of PACS52.40.Db,52.35.Hr E-mail:[email protected]