Aachen PK 2003 – wissenschaftliches Programm

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P: Plasmaphysik

P 17: Poster III

P 17.22: Poster

Donnerstag, 20. März 2003, 17:30–19:15, Foyer

Oscillations of positive column plasma due to ionization wave propagation and twodimensional structure of striations — •Rouslan Kozakov and Christian Wilke — Institut für Physik Ernst-Moritz-Arndt-Universität Greifswald

Time resolved measurements of electron energy distribution function (EEDF) and plasma potential in longitudinal and radial directions under the presence of S- and P- striations in neon were performed. Measurements by means of simultaneous displacement of electrodes relative to stationary probe in different radial positions of the probe with high spatial resolution were carried out. Decomposition method of obtained spatio-temporal structure of the potential is proposed. This is shown to be composed of potential oscillations and ionization wave potential.Experiments revealed two-dimensional structure of the striation potential field. Qualitative speculations on origins of this structure are conducted.