Schedule Oct 02, 2009
Weak Turbulence Evolution in Jets
Felix Spanier (Univ. Wuerzburg)

The spectrum of turbulence in jets of Active Galactic Nuclei as well as in solar shock regions plays an important role for a number of physical processes including particle acceleration and radiation signatures of transient phenomena. Unlike the fully evolved strong turbulence in the interstellar medium, which exhibits a Kolmogorov-like spectrum, here different processes take place. This has a fundamental effect on acceleration and diffusion in jets. The evolution of turbulence in jets can be described by means of the three-wave process and wave transmission processes. Here we present results of the analytical treatment of three-wave interaction of dispersive plasma waves. We will discuss the implications on diffusive shock acceleration of our findings. Additionally the idea of three-wave interaction has been extended to PiC-simulations. We will present methods to identify three-wave processes in these simulations.

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