The pin-to-plane electrode system for the multi-sectioned discharge in the transversal airflow at atmospheric pressure has been developed. The airflow is directed perpendicularly to the electric current. As it was revealed, all sections of the multi-sectioned discharge operate identically and independently to each other. For this reason, the spatial-temporal behavior of the discharge excited only in a single section was investigated. The pin-to-plane discharge (PPD) was powered by a positive polarity DC voltage that induces the spontaneously repeating streamer-spark breakdowns in a discharge gap. Each breakdown forms the plasma filament (PF) which further is being blown out of the discharge zone and stretched by the airflow. The PF impacts a dielectric plate located in the path of the airflow at different distances away from the discharge zone. Two modes in the behavior of the blown-out PF have been revealed. When the plate is close to the discharge zone, the blown-out PF is tightly pressed by the flow to the plate. In this case, both the brightness and electric current of the PF are periodically pulsing with a high frequency up to the plasma filament breaking up due to its strong elongation by the flow. If the plate is far away, the quasistationary regime happens, when both the filament brightness and filament current remain approximately constant at its elongating up to the PF breaking up. At this regime, the blown-out PF is being stretched in parallel to the surface without contacting it. The release of energy into PF continues also in the course of its blowing out. Due to that, the PPD pulsing mode generates a lot of reactive species inside the PF up to its impinging the object to be treated. This is a reason why the self-pulsing PPD can be highly effective for surface processing by non-thermal plasma.

中文翻译：

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横向气流中的针对平面自脉冲放电：与从放电区吹出的等离子体细丝基底相互作用

已经开发了用于在大气压下在横向气流中进行多段放电的针对平面电极系统。气流方向垂直于电流。正如所揭示的那样，多段排放的所有部分都相同且彼此独立地运行。因此，研究了仅在单个部分激发的放电的时空行为。引脚对平面放电 (PPD) 由正极性直流电压供电，该电压会在放电间隙中引发自发重复的流光火花击穿。每次击穿都会形成等离子灯丝 (PF)，该灯丝进一步被吹出放电区并被气流拉伸。PF 撞击位于气流路径中距放电区不同距离的介电板。已经揭示了爆裂 PF 行为的两种模式。当板片靠近卸料区时，吹出的PF被流向板片压紧。在这种情况下，PF 的亮度和电流都以高频周期性地脉动，直到等离子体灯丝由于流动的强伸长而破裂。如果板离得很远，准稳态状态就会发生，此时灯丝亮度和灯丝电流在其伸长直至 PF 断裂时都保持大致恒定。在这种情况下，吹出的 PF 平行于表面拉伸而不接触它。PF 中的能量在其吹灭过程中也在继续释放。因为那个，PPD 脉冲模式会在 PF 内产生大量反应性物质，直至撞击待处理的物体。这就是为什么自脉冲 PPD 可以非常有效地用于非热等离子体的表面处理的原因。