Aachen PK 2003 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

PV: Plenarvorträge

PV XIII

PV XIII: Plenarvortrag

Freitag, 21. März 2003, 09:00–09:45, FO1

Experiments and Simulations of Fully Developed Turbulence in Magnetised Plasmas — •Ulrich Stroth — IEAP, Christian-Albrechts-Universität zu Kiel

The investigation of fluid turbulence has a long history and is still a very active field of modern physics. Research focuses on various aspects like the linear instabilities, the different routes to a fully turbulent system and the statistical properties of this state. The same approach is used to investigate plasma turbulence. However, a plasma with two charged fluids coupled to electro-magnetic fields is a even more complex system. In addition, a magnetic field used for plasma confinement introduces 2-dimensional aspects to the 3-dimensional turbulence. In recent years, the numerical investigation of plasma turbulence has progressed considerably. As in other fields of physics, a close comparison between theoretical turbulence simulations and measurements is needed. Low-temperature plasmas are put forward as experiments, where a close comparison can be carried out. Starting from linear models the major properties of the microscopic structure of the turbulence are discussed. Simulation results are used to investigate, whether these signatures survive in a state of fully developed turbulence and how one can learn about the importance of the different driving forces. These results are used for comparisons with experimental data from different fusion and non-fusion devices, with an emphasis on the torsatron TJ-K, where detailed measurements can be carried out in the core of a toroidal plasma. The importance of concepts like self organised criticality, intermittency or zonal flows are discussed.