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介质阻挡放电羽的等离子体参数光学诊断

Optical Diagnosis on Plasma Parameters of a Plasma Plume Generated by Dielectric Barrier Discharge

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摘要

利用介质阻挡放电装置在大气压下产生了稳定的氩气等离子体羽,利用示波器对等离子体羽的外加电压、电流和发光信号进行了记录。光学诊断结果表明,等离子体羽由高速运动的等离子体子弹组成。基于碰撞辐射模型,利用300~800 nm范围的光学发射谱诊断了等离子体羽的电子密度。结果表明,电子密度随外加电压和气体流量的增大而增大,随驱动频率的增大而减小。利用光谱法对等离子体羽的振动温度和转动温度进行了研究,发现其振动温度和转动温度均随外加电压和气体流量的增大而升高,随驱动频率的增大而降低。通过分析放电电场,对以上现象进行了定性解释。

Abstract

A stable argon plasma plume is generated at atmospheric pressure by a plasma jet in dielectric barrier discharge configurations. The applied voltage, the current and the light emission signal are simultaneously recorded by an oscilloscope. Results indicate that the plasma plume is composed of successive fast-moving plasma bullets. Based on collisional-radiative model, the electron density of the plasma plume is investigated by optical emission spectrum in the range from 300 nm to 800 nm. Optical diagnosis shows that the electron density increases with the increasing applied voltage or gas flow rate. However, it decreases with the increasing driving frequency. The vibrational temperature and the rotational temperature of the plasma plume are also studied by optical emission spectroscopy. It is found that both of them increase with the increasing applied voltage or gas flow rate, and decrease with the increasing driving frequency. The aforementioned phenomena are qualitatively explained by analyzing the electric field of discharge.

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中图分类号:O433.1;O433.4

DOI:10.3788/aos201737.0430002

所属栏目:光谱学

基金项目:国家自然科学基金(11575050,10805013)、河北省自然科学基金(A2015201092,A2015201199)、河北省教育厅科研基金(LJRC011)

收稿日期:2016-11-21

修改稿日期:2016-12-20

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李亚茹:河北大学物理科学与技术学院, 河北 保定 071002
李雪辰:河北大学物理科学与技术学院, 河北 保定 071002河北省光电信息材料重点实验室, 河北 保定 071002
贾鹏英:河北大学物理科学与技术学院, 河北 保定 071002河北省光电信息材料重点实验室, 河北 保定 071002
张盼盼:河北大学物理科学与技术学院, 河北 保定 071002
耿金伶:河北大学物理科学与技术学院, 河北 保定 071002

联系人作者:李亚茹(liyaruu@126.com)

备注:李亚茹(1992-),女,硕士研究生,主要从事等离子体物理方面的研究。

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引用该论文

Li Yaru,Li Xuechen,Jia Pengying,Zhang Panpan,Geng Jinling. Optical Diagnosis on Plasma Parameters of a Plasma Plume Generated by Dielectric Barrier Discharge[J]. Acta Optica Sinica, 2017, 37(4): 0430002

李亚茹,李雪辰,贾鹏英,张盼盼,耿金伶. 介质阻挡放电羽的等离子体参数光学诊断[J]. 光学学报, 2017, 37(4): 0430002

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