Document Type

Article

Publication Date

6-2019

Publication Title

Japanese Journal of Applied Physics

Volume

58

Issue

6

Pages

066002 10 pages)

DOI

10.7567/1347-4065/ab1e6d

Abstract

Nanosecond pulsed helium plasma jets impinging on water produce hydroxyl radicals both in gas- and liquid-phase. In this study, the effects of pulse width on a repetitively pulsed plasma jet in contact with water are evaluated via OH(A-X) emission and OHaq production in water for various pulse widths ranging from 200 to 5000 ns. The maximal energy efficiency of OH(A-X) emission is obtained for pulse widths of 600-800 ns whereas the maximal efficiency of OHaq production is at 200 ns. Temporally-resolved emission spectroscopy shows that more than 40% of OH(A-X) emission is produced during the first 200 ns of the voltage pulse regardless of the pulse width. An equivalent circuit model of the plasma jet impinging on water is compiled to understand the charge transfer process, which is important for OHaq production via charge exchange reactions.

Comments

Web of Science: "Free full text from publisher."

© 2019 The Japan Society of Applied Physics

Original Publication Citation

Song, S. T., Sozer, E. B., & Jiang, C. Q. (2019). Effects of pulse width on he plasma jets in contact with water evaluated by oh(a-x) emission and OHaq production. Japanese Journal of Applied Physics, 58(6), 066002. doi:10.7567/1347-4065/ab1e6d

ORCID

0000-0002-6244-3670 (Sözer)

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