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The effects of grounded electrode geometry on RF-driven cold atmospheric pressure plasma micro-jet

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Journal of Theoretical and Applied Physics

Abstract

With the argument that two-electrode DBD-like systems are much more operational than single-electrode systems in biomedical applications, targets sensitive to temperature and electric shock, the effects of parameters associated with the geometry of the grounded electrode such as its shape, size, and position it at the output of the atmospheric pressure RF plasma jet in two-electrode systems is investigated. By varying the position of the typical narrow ring grounded electrode on the dielectric tube toward the powered electrode, the ratio of the axial to radial electric field components depend on the externally applied potential to the plasma has been investigated and shown that the axial component of the electric field is maximized at certain position(s) of the grounded electrode. The analysis of the data indicates that there is an inverse relationship between the magnitude of the axial electric field in the plasma channel and the discharge ignition voltage, and a direct relationship with the plasma jet length. It is known that by increasing the width of the ground electrode until the full covering of dielectric, the jet length increases from the dielectric output to the neighborhood near the needle electrode, and reduces the discharge ignition threshold and consequently power consumption of the jet, but increasing its width to greater than the above values does not have a significant effect on jet output. It has also been shown that by tapering the dielectric end and fully covering it with its conical-shaped electrode, the output jet length increases and decreases its width.

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Authors and Affiliations

  1. Advanced Plasma Laboratory, Faculty of Physics, University of Tabriz, Tabriz, Iran

    Davood Hassanpour & Sayyed-Jalal Pestehe

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  1. Davood Hassanpour
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  2. Sayyed-Jalal Pestehe
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Correspondence to Sayyed-Jalal Pestehe.

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Hassanpour, D., Pestehe, SJ. The effects of grounded electrode geometry on RF-driven cold atmospheric pressure plasma micro-jet. J Theor Appl Phys 14, 387–398 (2020). https://doi.org/10.1007/s40094-020-00395-0

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  • DOI: https://doi.org/10.1007/s40094-020-00395-0

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