光谱学与光谱分析, 2017, 37 (9): 2692, 网络出版: 2017-10-16  

介质阻挡放电中单双层气隙内微放电通道的等离子体参量研究

Study on the Plasma Parameters of Single and Double Gas Layer Gap in Dielectric Barrier Discharge
作者单位
河北大学物理科学与技术学院, 河北 保定 071002
摘要
采用H型放电间隙的介质阻挡放电装置, 在氩气和空气的混合气体中, 得到了三种新颖的等离子体发光斑图。 较于传统获得的斑图, 这三种发光斑图是产生在单层气隙与双层气隙结合的气隙装置之中。 通过相机拍摄到的斑图照片, 可以发现单层气隙和双层气隙中微放电通道呈现的发光亮度、 颜色、 放电面积等状态有所不同, 这表明微放电通道所处的等离子体状态可能各不相同。 通过分析这三种等离子体发光斑图, 利用发射光谱法首次研究了单层气隙和双层气隙内微放电通道的等离子体参量。 实验通过采集氮分子第二正带系(C3Πu→B3Πg)的发射谱线计算了单层气隙和双层气隙内微放电丝的分子振动温度, 并进一步利用氩原子696.57 nm(2P2→1S5)谱线的展宽分析了单层气隙和双层气隙内微放电丝的电子密度。 结果发现: 在左右相同厚度的双层气隙中, 耦合微放电丝的分子振动温度基本相同, 电子密度也趋于一致, 单层气隙内微放电丝的分子振动温度要高于双层气隙内微放电丝, 电子密度则小于双层气隙内微放电丝。 单层气隙和双层气隙中不同微放电通道等离子体状态的差异性使之形成多种折射率的等离子体光子晶体, 其周期性排布将具有更加丰富的带隙结构。
Abstract
Three kinds of new plasma emission patterns were obtained in the mixture of argon and air by using the dielectric barrier discharge device with H shaped gas gap. Compared with the traditional plasma emission patterns, the three kinds of plasma emission patterns are generated in the single and double gas layer gaps. By observing the images of the plasma emission patterns taken by a camera, the micro discharge channels of the single gas layer gap and the double gas layer gap are different in luminous brightness, color and discharge area, which indicates that the plasma parameters of the micro discharge channel may be different. Based on the analysis of three kinds of plasma emission patterns, the plasma parameters of the micro discharge channel in the single and double gas layer gaps were investigated by using the emission spectrum method for the first time. The emission spectra of the N2 second positive band (C3Πu→B3Πg) was collected to calculate the molecule vibration temperature. Furthermore, the broadening of spectral line 696.57 nm (2P2→1S5) was used to estimate the electron densities. The results show that the molecular vibration temperatures of couple filaments in the double gas layer gap with the same thickness are almost the same, and the electron densities are also consistent. The molecular vibration temperature of filaments in the single gas layer gap is higher than that of filaments in the double gas layer gap. The electron densities of filaments in the single gas layer gap are lower than that of filaments in the double gas layer gap. The differences of the plasma parameters of different micro discharge plasma channels in the single gas layer gap and the double gas layer gap can lead to the forming of plasma photonic crystals with various refractive indices, and its periodic arrangement gives it more abundant band gap structures.

高星, 董丽芳, 王浩, 张浩. 介质阻挡放电中单双层气隙内微放电通道的等离子体参量研究[J]. 光谱学与光谱分析, 2017, 37(9): 2692. GAO Xing, DONG Li-fang, WANG Hao, ZHANG Hao. Study on the Plasma Parameters of Single and Double Gas Layer Gap in Dielectric Barrier Discharge[J]. Spectroscopy and Spectral Analysis, 2017, 37(9): 2692.

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