Kiel 2004 – wissenschaftliches Programm
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P: Plasmaphysik
P 10: Postersitzung: Niedertemperaturplasmen Plasmatechnologie II, Staubige Plasmen II, Magnetischer Einschluss II
P 10.8: Poster
Dienstag, 9. März 2004, 17:45–19:30, Foyer
Travelling Bifurcation and Interaction of Dissipative Solitons in Planar DC Gas-Discharge Systems with High Ohmic Barrier — •Hans-Georg Purwins1, Hendrik U. Bödeker1, Andreas W. Liehr1, Rudolf Friedrich2, and Till D. Frank2 — 1Institut für Angewandte Physik, Corrensstr. 2/4, D-48149 Münster — 2Institut für Theoretische Physik, Wilhelm-Klemm-Str. 9, D-48149 Münster
Planar dc gas-discharge systems exhibit a large variety of self-organized dissipative patterns. Of particular interest for the present talk are well-localized solitary patterns that show up as bright spots in the discharge plane. These spots that we refer to as dissipative soltitons (DSs) are the projection of the luminescence radiation of well defined current filaments onto the discharge plane. Experiments prove that DSs are generic patterns and that they are rather robust with respect to interaction in the form of scattering or formation of molecules and that they may be annihilated or generated as a whole. In addition patterns of higher complexity are observed in which DSs act as elementary constituents.
Here we report on the first observation of the bifurcation of a stationary to a travelling DS using new statistic data analysis methods. With similar techniques also for the first time it was possible to determine from experimental data the interaction function of DSs. We also discuss the mechanisms being responsible for the stability and the interaction. Hereby we consider the experimental planar gas-discharge system as a 3-component reaction-diffusion system.