Particle Densities of the Atmospheric-Pressure Argon Plasmas Generated by the Pulsed Dielectric Barrier Discharges

PAN Jie (潘杰); LI Li (李莉); WANG Yunuan (王玉暖); XIU Xianwu (修显武); WANG Chao (王超); SONG Yuzhi (宋玉志)

doi:10.1088/1009-0630/18/11/05

Plasma Science and Technology > 2016 > 18(11): 1081-1088. > DOI: 10.1088/1009-0630/18/11/05

PAN Jie (潘杰), LI Li (李莉), WANG Yunuan (王玉暖), XIU Xianwu (修显武), WANG Chao (王超), SONG Yuzhi (宋玉志). Particle Densities of the Atmospheric-Pressure Argon Plasmas Generated by the Pulsed Dielectric Barrier Discharges[J]. Plasma Science and Technology, 2016, 18(11): 1081-1088. DOI: 10.1088/1009-0630/18/11/05

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Particle Densities of the Atmospheric-Pressure Argon Plasmas Generated by the Pulsed Dielectric Barrier Discharges

1School of Physics and Electronics, Shandong Normal University, Jinan 250014, China 2State Grid Jinan Power Supply Company, Jinan 250012, China

Funds: supported by Natural Science Foundation of Shandong Province, China (No. ZR2015AQ008), and Project of Shandong Province Higher Educational Science and Technology Program of China (No. J15LJ04)

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Received Date: January 18, 2016

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Abstract

Abstract

Atmospheric-pressure argon plasmas have received increasing attention due to their high potential in many industrial and biomedical applications. In this paper, a 1-D fluid model is used for studying the particle density characteristics of the argon plasmas generated by the pulsed dielectric barrier discharges. The temporal evolutions of the axial particle density distributions are illustrated, and the influences of changing the main discharge conditions on the averaged particle densities are researched by independently varying the various discharge conditions. The calculation results show that the electron density and the ion density reach two peaks near the momentary cathodes during the rising and the falling edges of the pulsed voltage. Compared with the charged particle densities, the densities of the resonance state atom Ar^r and the metastable state atom Ar^m have more uniform axial distributions, reach higher maximums and decay more slowly. During the platform of the pulsed voltage and the time interval between the pulses, the densities of the excited state atom Ar^∗ are far lower than those of the Ar^r or the Ar^m . The averaged particle densities of the different considered particles increase with the increases of the amplitude and the frequency of the pulsed voltage. Narrowing the discharge gap and increasing the relative dielectric constant of the dielectric also contribute to the increase of the averaged particle densities. The effects of reducing the discharge gap distance on the neutral particle densities are more significant than the influences on the charged particle densities.
- argon plasma,
- particle density,
- pulsed dielectric barrier discharge

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References

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