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Ignition Delay for Atmospheric Pressure Microplasmas
Author(s) -
Porteanu H. E.,
Kühn S.,
Gesche R.
Publication year - 2009
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.200910004
Subject(s) - ignition system , microwave , atmospheric pressure , plasma , materials science , spectrum analyzer , minimum ignition energy , reflection (computer programming) , computational physics , atomic physics , physics , mechanics , optics , thermodynamics , meteorology , nuclear physics , computer science , quantum mechanics , programming language
The ignition process in microplasmas is characterized by time resolved microwave reflection coefficient measurements, using a specially equipped vector network analyzer. We measured the time between the switching on of the microwave power and the onset of the plasma state in air at atmospheric pressures. The delay time decreases from approx. 3 ms to 60 μ s by increasing the microwave power from values just above the ignition threshold to higher values. A simple model shows the role of the free electrons in air and of the electrodes in the ignition process (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)