表面电荷
波克尔效应
纳秒
电子
电介质
电荷(物理)
波形
电压
化学
原子物理学
材料科学
微秒
分子物理学
分析化学(期刊)
光电子学
光学
物理
激光器
物理化学
量子力学
色谱法
作者
Ting Li,Huijie Yan,Jiaqi Li,Julian Schulze,Shudong Yu,Jian Song,Quan‐Zhi Zhang
标识
DOI:10.1088/1361-6595/ac676e
摘要
Abstract The charge accumulation and decay in surface dielectric barrier discharges (SDBDs) driven by a sine AC voltage waveform (4 kHz) in combination with a nanosecond positive voltage pulse (300 ns, 20 Hz) is experimentally investigated based on a combination of the electro-optical Pockels effect and a high-speed camera. It is found that the accumulation of positive surface charge on the dielectric promotes the discharge in the negative half cycle of the applied AC voltage, whereas it inhibits the development of following new positive charge filaments. The decay of a single positive charge filament on the surface is a result of the neutralization by negative charges that originate either from the migration of negative surface charge (electrons) or the drift of free electrons from the volume above the surface towards the surface. This work aims to contribute to a better understanding of the evolution of surface charge and its effects in SDBDs.
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