Reduced breakdown voltage for in-liquid plasma discharges using moveable electrodes
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Author(s)
Liu, Baowang
Li, Yiyang
Zhou, Renwu
Li, Wenshao
Hong, Jungmi
Zhang, Tianqi
Zhou, Dejiang
Xian, Yubin
Cullen, Patrick J
Lu, Xinpei
(Ken) Ostrikov, Kostya
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Abstract
Minimizing the breakdown voltage and discharge current required to initiate direct in-liquid discharges, thus lowering power-source requirements and avoiding electrode ablation, is crucial for industrial applications of in-liquid plasmas. Here we demonstrate such considerable reductions by employing movable electrodes, without changing the electrode configuration or increasing the system complexity. The new mechanism is based on electrostatic electrode attraction resulting in a reduction in the discharge spacing by up to 6 times and facilitating a plasma initiation at lower breakdown voltages. The accumulated charges consumed by the discharge revert the electrodes to the initial positions, forming a gliding arc between the enlarged gaps and thus inhibiting current increases and electrode ablation.
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Journal of Physics D: Applied Physics
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55
Issue
10
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Engineering
Physical sciences
Science & Technology
Physical Sciences
Physics, Applied
Physics
in-liquid plasma discharges
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Zhou, R; Liu, B; Li, Y; Zhou, R; Li, W; Hong, J; Zhang, T; Zhou, D; Xian, Y; Cullen, PJ; Lu, X; (Ken) Ostrikov, K, Reduced breakdown voltage for in-liquid plasma discharges using moveable electrodes, Journal of Physics D: Applied Physics, 2022, 55 (10), pp. 10LT01