open access

https://hdl.handle.net/2115/82317

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

英語

atmospheric-pressure plasma

2020-08

IOP Publishing

Plasma Sources Science and Technology

29(8)

085012

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.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

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

0963-0252