Measurement of Electron Density and Ion Collision Frequency with Dual Assisted Grounded Electrode DBD in Atmospheric Pressure Helium Plasma Jet

ZHOU Qiujiao (周秋娇); QI Bing (齐冰); HUANG Jianjun (黄建军); PAN Lizhu (潘丽竹); LIU Ying (刘英)

doi:10.1088/1009-0630/18/4/12

Plasma Science and Technology > 2016 > 18(4): 400-405. > DOI: 10.1088/1009-0630/18/4/12

ZHOU Qiujiao (周秋娇), QI Bing (齐冰), HUANG Jianjun (黄建军), PAN Lizhu (潘丽竹), LIU Ying (刘英). Measurement of Electron Density and Ion Collision Frequency with Dual Assisted Grounded Electrode DBD in Atmospheric Pressure Helium Plasma Jet[J]. Plasma Science and Technology, 2016, 18(4): 400-405. DOI: 10.1088/1009-0630/18/4/12

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Measurement of Electron Density and Ion Collision Frequency with Dual Assisted Grounded Electrode DBD in Atmospheric Pressure Helium Plasma Jet

Applied Low Temperature Plasma Laboratory, Shenzhen University, Shenzhen 518060, China

Funds: supported by National Natural Science Foundation of China (No. 11105093), the Technological Project of Shenzhen, China (No.JC201005280485A), and the Planned S&T Program of Shenzhen, China (No. JC201105170703A)

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Received Date: May 03, 2015

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Abstract

Abstract

The properties of a helium atmospheric-pressure plasma jet (APPJ) are diagnosed with a dual assisted grounded electrode dielectric barrier discharge device. In the glow discharge, we captured the current waveforms at the positions of the three grounded rings. From the current waveforms, the time delay between the adjacent positions of the rings is employed to calculate the plasma bullet velocity of the helium APPJ. Moreover, the electron density is deduced from a model combining with the time delay and current intensity, which is about 1011cm?3 . In addition, The ion-neutral particles collision frequency in the radial direction is calculated from the current phase difference between two rings, which is on the order of 107 Hz. The results are helpful for understanding the basic properties of APPJs.
- atmospheric plasma,
- plasma bullet velocity,
- electron density,
- collision fre?quency

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References

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