Berlin 2005 – wissenschaftliches Programm

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P: Plasmaphysik

P 14: Poster: Niedertemperaturplasmen / Plasmatechnologie 6, Diagnostik 4

P 14.1: Poster

Samstag, 5. März 2005, 14:45–16:45, Poster HU

Discharge oscillations in a system with the high-ohmic electrode — •Shalva Amiranashvili, Svetlana Gurevich, and Hans-Georg Purwins — Institut für Angewandte Physik, Westfälische Wilhelms-Universität

Discharge oscillations are considered in a sandwich-like discharge system consisting of two plane-parallel electrodes and a gaseous gap in between. The key system feature is a high-ohmic cathode opposed by an ordinary metal anode. We demonstrate that the breakdown is accompanied by current oscillations. The latter are caused by surface charge on the high-ohmic electrode and disappear when the electrode resistivity is small enough. Our results can be compared with experimental data and used to investigate discharge properties.