Aachen PK 2003 – scientific programme

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P: Plasmaphysik

P 17: Poster III

P 17.7: Poster

Thursday, March 20, 2003, 17:30–19:15, Foyer

Parameter Ranges for Ionisation-Waves — •Stefan Ullrich — Institut für Physik, Universität Greifswald, Domstrase 10a, 17489-Greifswald

Different types of Ionisation-waves in a glow-discharge appear in certain parameter ranges of current and pressure. They can be distinguished by the empiric Novak-constant N = p λ to r-, p- and s-waves.

In this contribution a method was developed to automatically characterize the areas of stability of a glow-discharge in a longitudinal magnetic field. As a test the Novak-constant was measured systematically in the p-I-range 0.1 .. 30mA, 0.1 .. 15mbar for an unmagnitized plasma.