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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v1.i2.40
pages 191-204

Nitrogen low pressure arc fluctuations

B Maheu
UMR CNRS 6614, Universite de Rouen - Place Emile Blondel 76821 Mont Saint Aignan Cedex - France
C. Letellier
INSA of Rouen - LEPS - UMR 6614 - CORIA Place Emile Blondel - 76131 Mont Saint Aignan Cedex - France
B. G. Cheron
UMR CNRS 6614, Universite de Rouen - Place Emile Blondel 76821 Mont Saint Aignan Cedex - France

RESUMO

A supersonic low pressure nitrogen plasma jet is studied by using tools from nonlinear dynamical systems theory like phase portraits. More conventional tools like Fourier spectra or time correlation coefficients are also used. We find (i) a low frequency evolution (due to the generator) in the electrodes potentials as well as in the intensity of nitrogen emission and (ii) high frequency fluctuations of electrodes potentials. Moreover, we show that the erosion of the anode affects the dynamics underlying the plasma jet and reduces the degrees of freedom of the system.


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