Impact of N2O admixture on the characteristics of pulsed dielectric barrier discharges in N2 at atmospheric pressure

被引：3
|
作者：
Hoeft, H. [1 ]
Kettlitz, M. [1 ]
Becker, M. M. [1 ]
Brandenburg, R. [1 ]
机构：
[1] Leibniz Inst Plasma Sci & Technol INP Greifswald, Felix Hausdorff Str 2, D-17489 Greifswald, Germany
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2020年 / 53卷 / 02期
关键词：
dielectric barrier discharge; nitrous oxide; electrical and optical diagnostics; 0D modelling; electron attachment/detachment; pre-ionisation; CHEMICAL-VAPOR-DEPOSITION; DIAGNOSTICS; FILAMENTARY; CHEMISTRY; MIXTURES; PHYSICS; AIR;
D O I：
10.1088/1361-6463/ab4944
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The impact of N2O admixtures on the inception and development of pulsed dielectric barrier discharges (DBDs) in N-2 at atmospheric pressure is studied using optical and electrical diagnostics supported by 0D modelling of the reaction kinetics. The N2O concentration in the N-2-N2O gas mixture was varied between virtually pure N-2 and 10 vol% N2O. A significant impact of N2O on the discharge characteristics was found for concentrations above 1000 ppm. In particular, a decrease of the transferred charge, and discharge energy and an increase of breakdown voltage, maximal discharge current, discharge emission diameter and velocity of the cathode-directed ionisation front (positive streamer) were observed. Additionally, a strong increase of breakdown voltage and discharge inception jitter accompanied by a decrease of the emission duration was found for N2O concentrations above 1 vol%. The modelling results indicate that for N2O concentrations in this range a transition from an electropositive to an electronegative regime takes place.
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页数：13
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