中文摘要：

为了进一步了解大气压氩气介质阻挡放电的机理和放电特征,采用平行电极结构的介质阻挡放电装置,研究了大气压氩气的放电模式、回路电流、发射光谱、电子温度等特性,对比分析了不同放电模式的特性差异.实验发现,随着电压升高,放电由局部的均匀放电过渡到斑图放电模式,最后演化为布满整个电极的伪均匀放电;Ar主要强度谱线与放电电流近似同步,证明电子碰撞电离是氩气放电电离的主要方式;放电过程中发射光谱强度及电子激发温度不是随外加电压升高而增大,而与放电模式有关;柱状斑图放电的电子激发温度远高于其他模式;电子激发温度随外加电压变化的趋势与放电功率密度一致.

英文摘要：

In order to further understand the mechanism and characteristics of dielectric barrier discharge （DBD） in argonat atmospheric pressure, we tested the discharge mode, loop current, emission spectrum, electronic excitation temperature,and some other features of the DBD in atmospheric-pressure argon with a parallel electrodes configuration, Then differ-ences of these characteristics between the diverse discharge modes were compared. The results show that, with increasingapplied voltage, the discharge transforms through a progression from partial homogeneous discharge to patterned dis-charge, and finally to pseudo homogeneous discharge that covers the whole electrode. The main spectral intensity presentsthe same trend as the discharge current, because the electrons are excited mainly by the direct bombardment in Ar DBD.The intensity of the emission spectrum and the electron excitation temperature do not always increase with the increasingapplied voltage, for they are related to the discharge modes. It is shown that the electron excitation temperature in the co-lurnnar pattern discharge mode is much higher than that in other modes. The electron excitation temperature varies withthe applied voltage in a similar tend to the discharge power density during the discharges.