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24 Sep 2007

Volume 91, Issue 13, Articles (13xxxx)

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Appl. Phys. Lett. 91, 132501 (2007); http://dx.doi.org/10.1063/1.2786856 (3 pages)

V. Rose, X. M. Cheng, D. J. Keavney, J. W. Freeland, K. S. Buchanan, B. Ilic, and V. Metlushko
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The nature of fluctuations in a double arc argon-nitrogen plasma jet

Xin Tu, Jianhua Yan, Liang Yu, Kefa Cen, and Bruno Chéron

Appl. Phys. Lett. 91, 131501 (2007); http://dx.doi.org/10.1063/1.2789397 (3 pages) | Cited 5 times

Online Publication Date: 26 September 2007

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The dynamic behavior of the double arc argon-nitrogen plasma jet is investigated by combined means of the fast Fourier transform, correlation function, and Wigner distribution. The restrike mode is identified as the fluctuation behavior in an argon-nitrogen plasma jet. The Fourier spectra exhibit two characteristic frequencies of 150 Hz and 4.1 kHz, which indicates that the nature of fluctuations in the double arc argon-nitrogen plasma can be ascribed to the power supply undulation and both arc roots motion on the anode channels. It is further found that the double anode torch could inhibit and reduce the restrike phenomenon.
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52.25.Gj Fluctuation and chaos phenomena
52.75.Hn Plasma torches
52.65.-y Plasma simulation
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