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- W4386446723 abstract "Abstract Based on a two dimensional self-consistent model, the effect of different CF 4 concentrations on the discharge dynamics characteristics, F-containing species distribution and the distribution of the axial and radial ionization rates of He atmospheric pressure plasma jet (APPJ) has been investigated. In addition, the accuracy of the simulation is verified by comparing the experimental results. The ionization rate of He APPJ enhances with the increase of CF 4 from 0% to 2% because of the Penning ionization of CF 4 with metastable He while decreases in the case of 3% CF 4 owing to the electronegativity and the electron excitation energy loss of CF 4 . The increase of CF 4 concentration and the decrease of the electron density leads to the decrease of CF 4 + density at 3% CF 4 . CF 3 + density is determined by the Penning ionization rate of CF 4 and the reaction rate of He + + CF 4 → CF 3 + + F + He. As CF 4 concentration increases from 2% to 3%, the decrease of metastable He and He + concentration results in the significant decrease of CF 3 + density. The densities of CF 3 − and F − keep increasing from 1% to 3% CF 4 due to the effect of the electron attachment reaction of CF 4 . With the addition of CF 4 , the ionization reaction of CF 4 is gradually playing the major role in the streamer head, the Penning ionization of CF 4 is the main source of electron ionization inside the jet and dominates in the formation of ionization wave tail. As the concentration of CF 4 increases from 0% to 2%, the electron impact ionization rates of He and CF 4 near the axis increase, resulting in the more uniform radial ionization rate distribution of He + 2% CF 4 APPJ." @default.
- W4386446723 created "2023-09-06" @default.
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- W4386446723 date "2023-09-13" @default.
- W4386446723 modified "2023-09-30" @default.
- W4386446723 title "Effect of CF4 concentration on the discharge dynamics and reactive species distribution of atmospheric nanosecond pulsed He plasma jet" @default.
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- W4386446723 doi "https://doi.org/10.1088/1361-6463/acf6d1" @default.
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