中文摘要：

均匀介质阻挡放电（HDBD）相对于丝状模式具有更为广阔的应用前景，为研究其机理特性，在8mm气隙距离的氦气和氖气中分别实现了大气压HDBD；通过电压电流波形和Lissajous图形测量以及发光图像拍摄比较了两者放电特性的区别；研究了不同电压幅值下两者各放电参量的变化规律，并结合放电机理分析对实验结果进行了讨论。研究结果表明：氦气和氖气中HDBD放电特性有着明显的区别。在8mm气隙距离下，随外加电压幅值增加，氦气HDBD的电流一直表现为单电流脉冲形式，且有“剩余电流峰”出现，其幅值较氖气中电流脉冲幅值大，且持续时间较短；氖气HDBD电流随外加电压幅值增加由单脉冲发展到为多电流脉冲形式，且多脉冲电流幅值依次递减。随着外加电压幅值的增加，两种气体中HDBD的各放电参量都增加，但是增加幅度有所不同。

英文摘要：

The HDBDs in 8mm gas gap distance in helium and neon at atmospheric pressure are obtained, respectively. The differences between their discharge characteristics are compared by means of voltage and current waveforms measurement, Lissajous figures measurement, and light-emission pictures taking. The change of discharge parameters of the two HDBDs with various amplitude of applied voltage are studied, and the experimental results are explained with the analysis of discharge mechanism. Results show that there are obvious differences between the dis- charge characteristics of HDBD in He and in Ne. As the amplitude of the applied voltage increases, the current of HDBD in He gas always appears as a single discharge current, and the presence of ＂residual current peak＂ is observed; the amplitude of current pulses in HDBD in He gas is higher than that of HDBD in Ne gas, and its duration is shorter. As the amplitude of the applied voltage increases, the current of HDBD in Ne gases changes from a single discharge current to multiple discharge current pulses, and the amplitude of the multiple current pulses decreases in sequence. The discharge parameters of these two HDBDs increase with the increase of the amplitude of applied voltage, but the changing trends are different.