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Periodically Self‐Excited Moving Striations in a Low‐Temperature Gas Plasma
Author(s) -
Ammelt E.,
Willebrand H.,
Purwins H.G.
Publication year - 1992
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150320103
Subject(s) - plasma , amplitude , materials science , striation , excited state , glow discharge , atomic physics , current (fluid) , voltage , mechanics , physics , optics , thermodynamics , quantum mechanics , composite material
A new nonlinear effect in a low temperature gas plasma has been found and investigated experimentally. At a critical value of the discharge current in a special glow discharge system the positive column constricts and striations evolve spontaneously. On a large time scale the pattern seems to consist of standing striations. At higher temporal resolution the striations turn out to be moving ones which are modulated by high amplitude oscillations of the total electric current and of the voltage observed at the device. In addition phenomena like period doubling and irregular behaviour occur.