中文摘要：

为了深入探究纳秒脉冲电源作用下沿面介质阻挡放电等离子体特性参数的演化规律,揭示其作用机理,文中搭建了纳秒脉冲电源作用下非对称结构沿面介质阻挡放电等离子体光电特性实验测量平台,并在此基础上建立了放电集总参数等效电路模型,通过对比实验推理和仿真计算分别得到的放电电流以及电子密度参量,证明了模型的有效性。文中通过该模型计算得到了介质表面电压、气隙电压以及电子温度等等离子体特性参数随时间的变化关系,并进一步研究了电源斜率对大气压沿面介质阻挡放电电流的影响。得到的主要结论为：单极性纳秒脉冲电源作用下,在脉冲上升沿存在二次放电,在下降沿存在反向放电过程,电子温度与电子密度高达8.3 e V和2.7×10^18 m^-3,电源斜率对放电有重要的影响,随着电压上升率增加,第1次放电的电流增大。放电时刻提前,但是对应的第2次放电电流略有减小,下降率的增加则对应着第2次放电电流幅值的增加,第1次放电的电流则略有减小,研究结果为深入分析激励器放电特性,提高等离子体发生器效率提供参考。

英文摘要：

In order to better understand the discharge mechanism of the surface dielectric barrier discharge and il- lustrate the regularity evolution of characteristic parameters of the plasma,an equivalent circuit of the asymmetric surface dielectric barrier discharge plasma generator is established based on the experimental results of electrical and optical diagnostics of surface dielectric barrier discharge. The parameters such as the discharge current and electron density acquired by the equivalent circuit model are fitting well with the experimental data,which proves the effectiveness of this model. Firstly, the variation of air gap voltage, voltage drop across the discharge gap,elec- tron density,electron temperature,were calculated.Moreover,the influence of the slope of the power supply on the discharge parameters mentioned above is analyzed. It is shown that under the effect of the nanosecond discharge, there exists the second discharge under the rising edge and the reverse discharge under the falling edge, and the electron density and electron temperature are 2.7×10^18 m^-3 and 8.3 eV. The slope of the power supply takes impor- tant part in the discharge. As the voltage rate of rise is increased, the discharge occurs earlierand the current in the first discharge increases but the second discharge current decreases slightly. The increase of the voltage rate of de- crease is positive correlation with the second discharge, but the first discharge current decreases slightly.