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Negative ion species in atmospheric-pressure helium dc glow discharge produced in ambient air

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Title: Negative ion species in atmospheric-pressure helium dc glow discharge produced in ambient air
Authors: Sasaki, Koichi Browse this author →KAKEN DB
Hosoda, Ryohei Browse this author
Shirai, Naoki Browse this author →KAKEN DB
Keywords: negative ion
laser photodetachment
atmospheric-pressure plasma
Issue Date: Aug-2020
Publisher: IOP Publishing
Journal Title: Plasma Sources Science and Technology
Volume: 29
Issue: 8
Start Page: 085012
Publisher DOI: 10.1088/1361-6595/aba6a3
Abstract: Experimental investigation on negative ions in atmospheric-pressure plasmas is insufficient to date. In this work, we examined negative ion species in atmospheric-pressure helium dc glow discharge produced in ambient air by laser photodetachment spectroscopy, where the pulsed increase in the discharge current was measured as a function of the laser wavelength. A major negative ion species was O(-)which was originated from molecular oxygen in the ambient air. OH(-)and Cl(-)were also major negative ion species when we used an NaCl solution as the cathode of the dc discharge.O2-<iwas minor in comparison with O-, and H(-)was negligible. The production process of OH(-)was not dissociative electron attachment to H2O. The experimental results are consistent with the dominant production of OH(-)due to dissociative electron attachment to H2O2.
Rights: This is the Accepted Manuscript version of an article accepted for publication in Plasma Sources Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6595/aba6a3
https://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/82317
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐々木 浩一

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