Weibel Instability Driven by Relativistic Pair Jets: Particle   Acceleration, Magnetic Field Generation, and Emission
  Shock acceleration is a ubiquitous phenomenon in astrophysical plasmas. Plasma waves and their associated instabilities (e.g., Buneman, Weibel and other two-stream instabilities) created in collisionless shocks are responsible for particle (electron, positron, and ion) acceleration. Using a 3-D relativistic electromagnetic particle (REMP) code, we have investigated particle acceleration associated with a relativistic jet front propagating into an ambient plasma. We find that the growth times of the Weibel instability in electron-positron jets are not affected by the (electron-positron or electron-ion) ambient plasmas. However, the amplitudes of generated local magnetic fields in the electron-ion ambient plasma are significantly larger than those in the electron-positron ambient plasma. 
K.-I. Nishikawa (NSSTC/UAH), P. Hardee (UA), C. B. Hededal (Niels Bohr   Institute), G. Richardson (UAH), H. Sol (OBSPM), R....