Plasma Instabilities of TeV Pair Beams Induced by Blazars

This thesis develops a new theory combining the beam-plasma instability and IGMF in one picture. Recently, it was observed that the expected cascade emission of gamma rays in the TeV range from some distant blazars is not seen in their spectra. The underlying physical processes are well known, and a failure of the model predictions would shake the foundations of modern physics unless a credible ex...