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

发布时间：2018-05-07 09:33

本文选题：介质阻挡放电 + 分子振动温度　；参考：《光谱学与光谱分析》2017年09期

【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(C~~3Π__u→B~~3Π__g)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696.57nm(2P_2→1S_5)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]:Using the dielectric barrier discharge device with H discharge gap, three novel plasma photoluminescence patterns were obtained in the mixture of argon and air. Compared with the conventional pattern, these three emission patterns are generated in a single air gap combined with a double air gap. Through the pattern photographs taken by the camera, we can find that the luminance, color, discharge area and other states of the micro-discharge channels in the single-layer air gap and the double-layer air gap are different. This indicates that the plasma state of the microdischarge channel may be different. The plasma parameters of micro-discharge channels in single-layer air gap and double-layer air gap are studied by means of the emission spectrum method through the analysis of these three kinds of plasma emission patterns. By collecting the emission lines of the second positive band system of nitrogen molecules, the molecular vibration temperatures of the microdischarge wires in the single layer air gap and the double layer air gap are calculated. The electron density of micro discharge wire in single and double air gap is analyzed by using the broadening of 696.57nm(2P_2 1 S 5) line of argon atom. The results show that the molecular vibration temperature and electron density of the coupled micro discharge wire are almost the same in the bilayer air gap with the same thickness, and the molecular vibration temperature in the single layer air gap is higher than that in the double layer air gap. The electron density is smaller than the microdischarge wire in the double layer air gap. The difference of plasma states in single-layer and double-layer air gap leads to the formation of multi-refractive index plasma photonic crystal, and its periodic arrangement will be more abundant in bandgap structure.
【作者单位】：河北大学物理科学与技术学院;
【基金】：国家自然科学基金项目(11375051) 河北省科技厅重点项目(11967135D) 河北省教育厅重点项目(ZD2010140)资助
【分类号】：O461.2;O53

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