The electron dynamics in a stable and non-filamentary Argon plasma jet, generated using AC excitation at kHz frequencies and interacting with a liquid surface either at floating potential or electrically grounded were examined using laser Thomson scattering. In the case of a floating liquid, two discharge events were observed during each half-cycle of the applied sinusoidal voltage. In the grounded liquid case only one discharge event was observed, which occurred during the positive half period. Through spatio-temporal imaging of the discharge, its repetitive breakdown behavior was analyzed and divided into pre-, main-, and post-breakdown phases. The dynamics and presence of the various phases differed depending upon the grounding of the liquid. Thomson scattering measurements revealed maximum electron densities and temperatures of 6.0–6.3 10¹⁴ cm⁻³ and 3.1–3.3 eV for the floating liquid case and 1.1 10¹⁵ cm⁻³ and 4.3 eV in the grounded liquid case. Electron-driven reactions are the primary source of reactive chemical species in a plasma jet. Therefore, the electrical characteristics of the liquid sample can impact the fundamental physicochemical processes at play in the discharge, ultimately influencing its chemical composition.

使用激光汤姆森散射检查稳定和非丝状氩等离子体射流中的电子动力学，使用 kHz 频率的交流激发产生并与处于浮动电位或电接地的液体表面相互作用。在漂浮液体的情况下，在施加的正弦电压的每个半周期期间观察到两次放电事件。在接地液体情况下，仅观察到一次放电事件，发生在正半周期。通过对放电的时空成像，分析其重复击穿行为并将其划分为击穿前、主要和击穿后阶段。各种相的动力学和存在因液体的接地而异。汤姆森散射测量显示最大电子密度和温度为 6.0–6.3 10¹⁴ cm ^-3和 3.1-3.3 eV 对于浮动液体情况和 1.1 10 ¹⁵ cm ^-3和 4.3 eV 在接地液体情况下。电子驱动的反应是等离子体射流中反应性化学物质的主要来源。因此，液体样品的电特性会影响放电过程中的基本物理化学过程，最终影响其化学成分。