团簇六边形斑图等离子体参数的光谱测量

在氩气和空气混合气体介质阻挡放电中，首次发现了团簇六边形斑图。运用发射光谱法，研究了此斑图中单个团簇的三种等离子体参数：分子振动温度、分子转动温度以及电子的平均能量随空气含量的变化。实验通过测量氮分子光谱并采用氮分子第二正带系(C3Π_u→B 3Π_g)计算了振动温度;同时采集氮分子离子(N+₂)的第一负带系(B 2Σ+_u→X 2Σ+_g)计算转动温度。利用氮分子离子391.4 nm和激发态的氮分子337.1 nm两条发射谱线的相对强度之比，作为研究电子平均能量的变化的依据。结果显示，当混合气体中空气含量从16%逐渐增大到24%时，三种等离子体参数均逐渐增大。

Measurement of Plasma Parameters in Cluster Hexagon Pattern Discharge by Optical Emission Spectrum

The cluster hexagon pattern was obtained in a dielectric barrier discharge in air/argon for the first time.Three plasma parameters,i.e.the molecular vibrational temperature,the molecular rotational temperature and the average electron energy of individual cluster in cluster hexagon pattern discharge,were studied by changing the air content.The molecular vibrational temperature and the molecular rotational temperature were calculated using the second positive band system of nitrogen molecules(C 3Πu→B 3Πg) and the first negative band system of nitrogen molecular ions(B 2Σ+u→X 2Σ+g).The relative intensities of the first negative system of nitrogen molecular ions(391.4 nm) and nitrogen molecules emission spectrum line(337.1nm) were analyzed for studying the variations of the electron energy.It was found that the three plasma parameters of individual cluster in cluster hexagon pattern increase with air content increasing from 16% to 24%.