介质阻挡放电中白眼斑图的分子振动温度  

Measurement of Molecular Vibrational Temperature of the White-Eye Pattern in Dielectric Barrier Discharge

作　　者：董丽芳[1] 闫冬梅[1] 耿轶青[1] 申中凯[1] 仝国良[1] 

机构地区：[1]河北大学物理与技术学院,河北保定071002

出　　处：《光谱学与光谱分析》2012年第10期2620-2622,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(11175054);河北省自然科学基金资助项目(A2010000185);博士点基金项目(20101301110001);河北省科技厅重点项目(11967135D)资助

摘　　要：在空气和氩气的混合气体介质阻挡放电中,得到了白眼斑图,其晶胞是由一个封闭六边形包围一个亮点所组成。观察发现,该斑图单个晶胞上中心点、六边形顶点及六边形边上呈现出三种不同的亮暗状态。该工作利用光谱方法,分别对白眼斑图单个晶胞以上三处的振动温度进行了测量,并研究了它们随氩气含量的变化。振动温度是根据氮分子的第二正带系(C3Πu→B3Πg)的发射谱线计算的。结果表明:白眼斑图中的中心点、六边形的顶点以及六边形边上中点的振动温度依次升高,且均随氩气含量的增加而减小。The white-eye pattern, whose cell is composed of a bright dot surrounded by a closed hexagon, was observed in air/ argon dielectric barrier discharge. It was found that the center dot, the vertex of hexagon and the center of hexagon side in a cell have different brightness. By using optical emission spectra, the vibrational temperature in the center dot, the vertex of hexagon and the center of hexagon side was measured, respectively. The variations in the vibrational temperature at these three places as a function of the content of argon in gas mixture were also studied. The vibrational temperature was calculated by emission spectral lines of the Nz second positive band system （ C^3Ⅱu→B^3Ⅱg ）. The experimental results show that the vibrational temperature of the center dot, the vertex of hexagon and the center of hexagon side is in the ascending order and decreases with the increase in the content of argon in gas mixture.

关 键 词：介质阻挡放电 白眼斑图 振动温度 光谱诊断 

分 类 号：O561.4[理学—原子与分子物理] O433.4[理学—物理]