Dielectric barrier discharges (DBDs) driven by nanosecond high-voltage pulses can be quite different from those driven by alternating current (ac) sources, on both electrical characteristics and plasma microparameters. In this article, the power measurement strategy in nanosecond pulsed coaxial DBDs is optimized. The effect of different experimental parameters on energy deposition and reduced electric field in plasma is investigated. First, the results measured using the instantaneous power (from the production of voltage and current) method and that using the $v$ – $q$ trace (Lissajous curve) method are compared and the source of divergence is analyzed. By comparing monitor capacitors with different materials and capacitances, it is demonstrated that the high-frequency response of the monitor capacitor is essential and the capacitance value can be adjusted according to the applied voltage, taking both the dynamic range of oscilloscope and the signal-to-noise ratio into consideration. Second, the influence of morphology of ground electrode, voltage rising time, and pulse width on energy deposition per-pulse and reduced electric field, obtained from the nitrogen spectral line-ratio, is studied. It is found that the copper foil promotes the discharge energy coupling per-pulse compared with the copper grid, while the reduced electric field obtained from the nitrogen line-ratio with the copper foil is weaker. A shorter rising time will also enhance the energy coupling per-pulse, as well as the reduced electric field.

中文翻译：

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纳秒脉冲同轴介质阻挡放电功率测量和能量耦合增强策略


纳秒高压脉冲驱动的介质阻挡放电 (DBD) 在电气特性和等离子体微参数方面与交流 (ac) 源驱动的介质阻挡放电有很大不同。在本文中，优化了纳秒脉冲同轴 DBD 中的功率测量策略。研究了不同实验参数对等离子体中能量沉积和降低电场的影响。首先，比较使用瞬时功率（来自电压和电流的产生）方法和使用$v$ – $q$迹线（利萨如曲线）方法测量的结果，并分析偏差的来源。通过对不同材料和电容的监控电容的比较，证明了监控电容的高频响应至关重要，并且可以根据施加的电压调整电容值，同时考虑示波器的动态范围和信号的动态范围。 -考虑噪声比。其次，研究了接地电极的形态、电压上升时间和脉冲宽度对每脉冲能量沉积和从氮谱线比获得的降低电场的影响。研究发现，与铜栅相比，铜箔促进了每脉冲的放电能量耦合，而由氮线比与铜箔获得的降低电场则较弱。较短的上升时间还将增强每脉冲的能量耦合，并降低电场。