Electrical features of radio-frequency atmospheric pressure helium discharge with and without dielectric electrodes

H ASHRAF; S Z A SHAH; H I A QAZI; M A KHAN; S HUSSAIN; M A BADAR; S NIAZ; M SHAFIQ

doi:10.1088/2058-6272/aaede1

Plasma Science and Technology > 2019 > 21(2): 25403-025403. > DOI: 10.1088/2058-6272/aaede1

H ASHRAF, S Z A SHAH, H I A QAZI, M A KHAN, S HUSSAIN, M A BADAR, S NIAZ, M SHAFIQ. Electrical features of radio-frequency atmospheric pressure helium discharge with and without dielectric electrodes[J]. Plasma Science and Technology, 2019, 21(2): 25403-025403. DOI: 10.1088/2058-6272/aaede1

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Electrical features of radio-frequency atmospheric pressure helium discharge with and without dielectric electrodes

¹ Department of Physics, University of Sargodha, 40100 Sargodha, Pakistan
² Department of Physics, Quaid-i-Azam University, 45320 Islamabad, Pakistan

Funds: This work is partially supported by the Higher Education Commission Project No. 1852.

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Received Date: July 06, 2018

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Abstract

A comparative study of radio-frequency atmospheric pressure glow discharge (rf APGD) generated in helium with and without dielectric electrodes to investigate the effect of electrodes insulation on electrical features of APGD is presented. In the α mode, both the rf APGDs remain volumetric, stable and uniform. In the γ mode, the APGD without dielectric electrodes shrinks into a constricted plasma column whereas APGD with dielectric electrodes remains stable and retains the same volume without plasma constriction even at higher densities of discharge current. A comparison of electrical features of both rf APGDs in normal and abnormal glow discharge regimes is presented. In both APGDs with and without dielectric electrodes, impedance measurements have been performed and compared with equivalent circuit models. The measured impedance data is found to be in good agreement with simulated data.
- radiofrequency atmospheric pressure glow discharge,
- dielectric electrodes,
- plasma stability control

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Electrical features of radio-frequency atmospheric pressure helium discharge with and without dielectric electrodes

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