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dc.contributor.authorGong, W.
dc.contributor.authorYue, Y.
dc.contributor.authorMa, F.
dc.contributor.authorYu, F.
dc.contributor.authorWan, J.
dc.contributor.authorNie, L.
dc.contributor.authorBazaka, K.
dc.contributor.authorXian, Y.
dc.contributor.authorLu, X.
dc.contributor.authorOstrikov, K.
dc.date.accessioned2018-01-28T07:01:35Z
dc.date.available2018-01-28T07:01:35Z
dc.date.issued2018-01-08
dc.identifier.citationGong W, Yue Y, Ma F, Yu F, Wan J, et al. (2018) Control of radial propagation and polarity in a plasma jet in surrounding Ar. Physics of Plasmas 25: 013505. Available: http://dx.doi.org/10.1063/1.5010993.
dc.identifier.issn1070-664X
dc.identifier.issn1089-7674
dc.identifier.doi10.1063/1.5010993
dc.identifier.urihttp://hdl.handle.net/10754/626851
dc.description.abstractIn recent years, the use of shielding gas to prevent the diffusion of the ambient air, particularly oxygen and nitrogen species, into the effluent of the atmospheric pressure plasma jet, and thus control the nature of chemical species used in the plasma treatment has increased. In this paper, the radial propagation of a plasma jet in ambient Ar is examined to find the key determinants of the polarity of plasma jets. The dynamics of the discharge reveal that the radial diffusion discharge is a special phenomenon observed only at the falling edge of the pulses. The radial transport of electrons, which is driven by the radial component of the applied electric field at the falling edge of the pulse, is shown to play an important role in increasing the seed electron density in the surrounding Ar. This result suggests a method to provide seed electrons at atmospheric pressure with a negative discharge. The polarity of the plasma jet is found to be determined by the pulse width rather than the polarity of the applied voltage, as it dictates the relative difference in the intensity of the two discharges in a single pulse, where the stronger discharge in a pulse dominates the behavior of the plasma jet. Accordingly, a method to control the polarity of a plasma jet through varying the pulse width is developed. Since plasma jets of different polarities differ remarkably in terms of their characteristics, the method to control the polarity reported in this paper will be of use for such applications as plasma-enhanced processing of materials and plasma biomedicine.
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (Grant No. 51507071).
dc.publisherAIP Publishing
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/1.5010993
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Physics of Plasmas and may be found at http://doi.org/10.1063/1.5010993.
dc.subjectPlasma confinement
dc.subjectElectronic structure
dc.subjectElectrical properties
dc.subjectElectrostatics
dc.subjectPlasma sources
dc.titleControl of radial propagation and polarity in a plasma jet in surrounding Ar
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.identifier.journalPhysics of Plasmas
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionNational Demonstration Center for Experimental Electrical and Electronic Education, Yangtze University, Jingzhou, Hubei 434000, People's Republic of China and Electronics and Information School, Yangtze University, Jingzhou, Hubei 434000, People's Republic of China
dc.contributor.institutionState Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
dc.contributor.institutionGuangxi Medical Equipment Testing Center, Xinmin Road 1-1, Nanning, Guangxi 530021, People's Republic of China
dc.contributor.institutionCSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, PO Box 218, Lindfield, NSW 2070, Australia
dc.contributor.institutionSchool of Chemistry, Physics, Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
kaust.personYue, Y.


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