Ionization behavior of hairpin argon plasma jets resonantly generated by microwave pulses at atmospheric pressure

Chen, Zhaoquan; Yang, Jie; Chen, Sile; Xu, Xiping; Luo, Jianxun; Wang, Bing; Zhou, Yuming; Lü, Xinpei

doi:10.1360/sspma-2022-0034

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…(1) 如下所示: 辐射增强现象. 这是因为脉冲功率消失, 趋肤效应消失 [7] , 等离子体射流外部的高能电子汇聚到射流内部, 在电子移动的过程中与Ar/N 2 气体分子频繁地发生碰撞, 碰撞过程产生了更多的热电子和激发态粒子, 增强了等离子体射流的光辐射, 此后热电子逐渐消失, 激发态粒子也退激发而逐渐消失 [43,44] . 量级) [45] .…”

Section: 活性粒子检测unclassified

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets

CHEN,

WANG,

CHEN

et al. 2024

Sci. Sin.-Phys. Mech. Astron.

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Section: 活性粒子检测unclassified

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets

CHEN,

WANG,

CHEN

et al. 2024

Sci. Sin.-Phys. Mech. Astron.

Self Cite

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Research on ionization characteristics of atmospheric pressure pulse-modulated microwave He/air plasma jet

Zhang,

Chen,

Chu

et al. 2024

Journal of Applied Physics

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The atmospheric pressure pulsed microwave He plasma jet has the advantages of high electron density and abundant active particles, but its shrinking on the discharge electrode morphology limits its application range. In order to modulate a He plasma jet with a longer plume and study its ionization development characteristics, we constructed a dual-channel pulsed microwave coaxial discharge device. He and air were, respectively, injected into the inner and outer gas channels of the resonator to generate a double-layer atmospheric pressure microwave plasma jet with a longer plume. It is observed that the bifurcation of the stratified plasma jet will occur by changing the gas flow. The ionization development of plasma jet was observed by using enhanced charge-coupled device and microwave Rayleigh scattering apparatus measured the space-time evolution of plasma and observed the three times ionization enhancement process of plasma jet development. The spectral lines of the active products associated with Penning ionization were observed by using a fiber optic spectrometer. A fluid model was constructed to simulate and analyze that under the condition of sufficient He flow rate (He flow rate is above 0.6 slm), there will be sufficient and stable He mole fraction (64%) at the stratification of the plasma jet. The experimental and simulation results show that the jet profile of the microwave He plasma is related to the inlet structure of the discharger and He flow rate. Stratified intake structure can produce stratified He plasma jet, and the unique appearance of bifurcation of jet can be produced by changing the flow rate of He. In the bifurcation process of the plasma jet, the product of Penning ionization inhibits the development of the main branch of the plasma jet, and the secondary electron avalanche of the local electric field promotes the formation of the branch of the plasma jet and is accompanied by the enhancement of the second ionization. The ionization mechanism of microwave He plasma is the resonance excitation of local enhanced electric field, the advance of ionizing waves, and the interaction between the spatially distributed active particles.

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Simulation on the arrayed microhollow cathode sustained discharges

HE,

FANG,

DENG

et al. 2024

Sci. Sin.-Phys. Mech. Astron.

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Ionization behavior of hairpin argon plasma jets resonantly generated by microwave pulses at atmospheric pressure

Cited by 3 publications

References 29 publications

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets

Research on ionization characteristics of atmospheric pressure pulse-modulated microwave He/air plasma jet

Simulation on the arrayed microhollow cathode sustained discharges

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Ionization behavior of hairpin argon plasma jets resonantly generated by microwave pulses at atmospheric pressure

Cited by 3 publications

References 29 publications

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N&lt;sub&gt;2&lt;/sub&gt; plasma jets

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N&lt;sub&gt;2&lt;/sub&gt; plasma jets

Research on ionization characteristics of atmospheric pressure pulse-modulated microwave He/air plasma jet

Simulation on the arrayed microhollow cathode sustained discharges

Contact Info

Product

Resources

About

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets

Study of spatiotemporal characteristics of atmospheric-pressure pulsed microwave Ar/N<sub>2</sub> plasma jets