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Article

Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant

Department of Pulse Plasma Systems, Institute of Plasma Physics of the Czech Academy of Sciences, Za Slovankou 1782/3, 182 00 Prague, Czech Republic
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Academic Editor: Sara Pescetelli
Processes 2022, 10(8), 1474; https://doi.org/10.3390/pr10081474
Received: 29 June 2022 / Revised: 11 July 2022 / Accepted: 25 July 2022 / Published: 27 July 2022
(This article belongs to the Special Issue Nanosecond Discharge Processes in Liquid Water)
This paper is aimed at the investigation of the acoustic and spectral characteristics of underwater electric sparks generated between two plate electrodes, using synchronized gas bubble injection. There are two purposes served by discharge initiation in the bubble. Firstly, it creates a favorable condition for electrical breakdown. Secondly, the gas bubble provides an opportunity for the direct spectroscopy of plasma light emission, avoiding water absorption. The effect of water absorption on captured spectra was studied. It was observed that the emission intensity of the Ha line and a shockwave amplitude generated by discharge strongly depend on the size of the gas bubble in the moment of the discharge initiation. It was found that the plasma in the underwater spark channel does not correspond to a source of black-body radiation. This study can be also very useful for understanding the difference between discharges produced directly in a liquid and discharges produced in gas/vapor bubbles surrounded by a liquid. View Full-Text
Keywords: water; underwater spark; optical emission spectroscopy; shockwave; black body radiation water; underwater spark; optical emission spectroscopy; shockwave; black body radiation
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MDPI and ACS Style

Stelmashuk, V.; Prukner, V.; Kolacek, K.; Tuholukov, A.; Hoffer, P.; Straus, J.; Frolov, O.; Jirasek, V. Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant. Processes 2022, 10, 1474. https://doi.org/10.3390/pr10081474

AMA Style

Stelmashuk V, Prukner V, Kolacek K, Tuholukov A, Hoffer P, Straus J, Frolov O, Jirasek V. Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant. Processes. 2022; 10(8):1474. https://doi.org/10.3390/pr10081474

Chicago/Turabian Style

Stelmashuk, Vitaliy, Vaclav Prukner, Karel Kolacek, Andrii Tuholukov, Petr Hoffer, Jaroslav Straus, Oleksandr Frolov, and Vit Jirasek. 2022. "Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant" Processes 10, no. 8: 1474. https://doi.org/10.3390/pr10081474

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