This study presents the characterization of plasmas in solution using bipolar pulsed power sources. We aim to understand how the modulation of voltage pulses influences the plasma characteristics and the optical emission of plasmas. We use several repetitive pulse modes with different voltage waveforms, pulse widths, and frequencies to tailor the plasma. Electrical and optical diagnostics are performed. Optical emission spectroscopy is used to detect metallic ions. Applying a low‐voltage prepulse before the high‐voltage pulse, Pb emission intensity increases by 10 times. Changing the prepulse greatly alters the gas generated on the surface of discharge electrode and the plasma behavior. This finding provides a novel route for efficiently controlling the plasma behavior for environmental monitoring applications using bipolar pulses.

中文翻译：

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使用双极性脉冲功率表征水溶液中的血浆：定制血浆和光发射，对检测铅有影响

这项研究提出了使用双极性脉冲电源的溶液中等离子体的表征。我们旨在了解电压脉冲的调制如何影响等离子体特性和等离子体的光发射。我们使用具有不同电压波形，脉冲宽度和频率的几种重复脉冲模式来定制等离子体。进行电气和光学诊断。发射光谱用于检测金属离子。在高压脉冲之前施加低压预脉冲，Pb发射强度增加10倍。改变预脉冲会极大地改变放电电极表面上产生的气体和等离子体行为。这一发现为使用双极脉冲的环境监测应用有效控制等离子体行为提供了一条新颖的途径。