Non-linear macro evolution of a dc driven micro atmospheric glow discharge

Abstract

We studied the macro evolution of the micro atmospheric glow discharge generated between a micro argon jet into ambient air and static water. The micro discharge behaves similarly to a complex ecosystem. Non-linear behaviors are found for the micro discharge when the water acts as a cathode, different from the discharge when water behaves as an anode. Groups of snapshots of the micro discharge formed at different discharge currents are captured by an intensified charge-coupled device with controlled exposure time, and each group consisted of 256 images taken in succession. Edge detection methods are used to identify the water surface and then the total brightness is defined by adding up the signal counts over the area of the micro discharge. Motions of the water surface at different discharge currents show that the water surface lowers increasingly rapidly when the water acts as a cathode. In contrast, the water surface lowers at a constant speed when the water behaves as an anode. The light curves are similar to logistic growth curves, suggesting that a selfinhibition process occurs in the micro discharge. Meanwhile, the total brightness increases linearly during the same time when the water acts as an anode. Discharge-water interactions cause the micro discharge to evolve. The charged particle bomb process is probably responsible for the different behavior of the micro discharges when the water acts as cathode and anode.

Lightning under water: Diverse reactive environments and evidence of synergistic effects for material treatment and activation

“…Figure 20(b) depicts the central concept of how plasma interactions with cells can lead to transitions between different plasma discharge modes, thus potentially enabling plasma self-adaptation in a sophisticated, non-linear mode. 167 Introduction of an active feedback into the system with a plasma-liquid interface ensures conceptually new level of adaptation, with a set of experimentally proven, unique results…”

Adaptive low-temperature plasmas

“…It has been seen that a three-dimensional collective motion of plasma filaments can be observed [14]. The non-linear evolution of an argon discharge above the water electrode has been investigated [15]. It was argued that in such a setting the charged particle bombardment process was probably responsible for the different behaviors of the micro discharges when the water acts as cathode and anode.…”

Various concentric-ring patterns formed in a water-anode glow discharge operated at atmospheric pressure

“…Water-electrode discharges can normally operate at atmospheric pressure and at a glow discharge mode [1], because the water electrode limits discharge current, and water evaporation has a cooling effect [2]. They are attracting more and more attentions due to abundance in reactive oxygen and nitrogen species [2,3].…”