Self-deformation in a direct current driven helium jet micro discharge

Xu, Shaofeng; Zhong, Xia

doi:10.1063/1.4939801

Cited by 8 publications

(8 citation statements)

References 19 publications

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“…These SOPs can be described according to the parameters used in the studies reported in Table I, i.e., their size, their structural complexity (e.g., concentric rings, 19,34,36,37 strips, 34,37 spots, 19,34,37 or round area 19,34,35,37 ), and their dynamics, e.g., rotations. 19,34,36 In region I (I>26 mA), the bulk discharge appears diffusive in a pearshape 48,69 with an enlarged diameter close to the one of the SOPs formed on the liquid interface.…”

Section: Iiib2 Discussion On Sops Evolution With Discharge Currentmentioning

confidence: 99%

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Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation

Zhang

Dufour

2018

Physics of Plasmas

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A pin liquid anode DC discharge is generated in open air without any additional gas feeding to form self-organized patterns (SOPs) on various liquid interfaces. Axially resolved emission spectra of the whole discharge reveal that the selforganized patterns are formed below a dark region and are visible mainly due to the N2 (C 3 -B 3 ) transitions. The high energy N2 (C) level is mainly excited by the impact of electrons heated by the local increased electric field at the interface. For the first time, the effect of the liquid type on the SOP formation is presented. With almost the same other discharge conditions, the formed SOPs are significantly different from HCl and H2SO4 liquid anodes. The SOP difference is repeated when the discharge current and gap distance change for both liquid anodes. The variations of SOP size and discretization as a function of discharge current and gap distance are discussed and confirm that different SOPs are formed by the HCl liquid anode from tap water or the H2SO4 liquid anode. A possible explanation is brought up to explain the dependence of SOPs on the liquid type. Effect of liquid types on formation, S. Zhang, T. Dufour, Physics of Plasmas 25, 073502 (2018) Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation, S. Zhang, T. Dufour, Physics of Plasmas 25, 073502 (2018) Self-organized patterns by a DC pin liquid anode discharge in ambient air:

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Section: Iiib2 Discussion On Sops Evolution With Discharge Currentmentioning

confidence: 99%

“…• CBLD in noble gas on the cathode [20][21][22][23][24] • DBD with a semiconductor electrode 25 • Glow discharge at at 1 atm on the anode 26,27 and low pressure [28][29][30][31][32] • Pin liquid electrode discharge in the air with auxiliary gas [33][34][35] and without [36][37][38] .…”

Section: DCmentioning

confidence: 99%

Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation

Zhang

Dufour

2018

Physics of Plasmas

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“…To this end, different types of self-organization phenomena have been reported in a wide range of LTPs, such as dielectric barrier discharge [9], high frequency discharge [10], gas flow stabilized discharges [11,12] and resistively stabilized discharges [13]. 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].…”

Section: Introductionmentioning

confidence: 99%

Adaptive low-temperature plasmas

Keidar

2024

Plasma Phys. Control. Fusion

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This paper highlights the uniqueness of low-temperature plasma (LTP) that is its ability to change the chemical composition in situ. An adaptive LTP platform is a plasma device that can adjust the plasma composition to obtain optimal desirable outcomes through its interaction with a target. This approach relays on the ability of measuring real time response of target to plasma action. In the biological application, feedback consists of the cellular response to plasma immediately after treatment and modifying the composition and power of plasma via a feedback mechanism. Plasma self-adaptation might be feasible due to self-organization and pattern formation when plasma interacts with targets. An adaptive plasma system is required an integration with multi-modal sensors, augmented by artificial intelligence where appropriate. Such adaptive LTP platforms might lead to treatment of biological targets on demand at the dose that is optimized by outcome (e.g., decontamination, disinfection) at the lowest possible cost and smallest environmental impact. In this paper we explore possibilities and opportunities that the adaptive plasma as a therapeutic system.

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“…Self-organized pattern transition on the liquid surface has attracted a tremendous amount of interests from the plasma community [17][18][19][20][21][22][23][24] because it encompasses a diversity of physical and chemical process at the plasma-liquid interface. Wilson et al observed [19] that a luminous spot formed on the gold or water anode produced circular patterns, while the spot rotation speed depended on the gas composition, discharge current, and discharge length.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of pattern transitions on water surface in contact with DC microplasmas

Chen

Feng

Zhang

et al. 2020

Plasma Sci. Technol.

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The DC-driven atmospheric-pressure microplasma is generated in a helium gas flowing through the metal tube cathode and is brought into contact with the surface of the water with the immersed Pt anode. By adjusting the gas flow, discharge current and gap distance, self-organized patterns are observed and varied sequentially from the homogeneous spot to the ring-like shape, distinct spot shape and the gearwheel shape on the water surface. The electrode temperature is measured and the gas temperature of the plasma discharge is calculated through the numerical fitting of the second positive system of the spectrum of N 2 molecules. It is shown that the pattern transition is related to the electrode and gas temperatures of the plasma. Moreover, specific discretization features of the patterns are shown to appear at certain gas temperatures.

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Self-deformation in a direct current driven helium jet micro discharge

Cited by 8 publications

References 19 publications

Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation

Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation

Adaptive low-temperature plasmas

Temperature dependence of pattern transitions on water surface in contact with DC microplasmas

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