Wave energies and nonthermal power dissipation in a plasma penetrated by a scattered relativistic beam

Summary form only given, as follows. We have investigated the conditions for a nonthermal dissipative quasisteady state of a bean-penetrated plasma, in which the primary unstable space-charge waves transfer power to nonlinearly-induced secondary space charge waves and density fluctuations (cavitons), and in which nonthermal randomly accelerated plasma electrons created by these nonlineanties provide and represent greatly enhanced Landau damping of the sccondaly waves. The power balance of the energized nonthermal hat electrons and the three wave populations is studied for astrophysical applications, and used to allow some inference about beam-plasma properties from potential radiation spectrum observation.