Length control of He atmospheric plasma jet plumes: Effects of discharge parameters and ambient air

Xiong, Q., Lu, X., Ostrikov, K., Xiong, Z., Xian, Y., Zhou, F., Zou, C., Hu, J., Gong, W., & Jiang, Z. (2009) Length control of He atmospheric plasma jet plumes: Effects of discharge parameters and ambient air. Physics of Plasmas, 16(4), 043505-1.

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The effects of various discharge parameters and ambient gas on the length of He atmospheric plasma jet plumes expanding into the open air are studied. It is found that the voltage and width of the discharge-sustaining pulses exert significantly stronger effects on the plume length than the pulse frequency, gas flow rate, and nozzle diameter. This result is explained through detailed analysis of the I-V characteristics of the primary and secondary discharges which reveals the major role of the integrated total charges of the primary discharge in the plasma dynamics. The length of the jet plume can be significantly increased by guiding the propagating plume into a glass tube attached to the nozzle. This increase is attributed to elimination of the diffusion of surrounding air into the plasma plume, an absence which facilitates the propagation of the ionization front. These results are important for establishing a good level of understanding of the expansion dynamics and for enabling a high degree of control of atmospheric pressure plasmas in biomedical, materials synthesis and processing, environmental and other existing and emerging industrial applications. © 2009 American Institute of Physics.

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ID Code: 73844
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1063/1.3119212
ISSN: 1070-664X
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 American Institute of Physics
Deposited On: 11 Jul 2014 04:30
Last Modified: 13 Jul 2014 22:51

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