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Negative ion species in atmospheric-pressure helium dc glow discharge produced in ambient air
| Content Provider | Scilit |
|---|---|
| Author | Sasaki, Koichi Hosoda, Ryohei Shirai, Naoki |
| Copyright Year | 2020 |
| Description | Journal: Plasma Sources Science and Technology 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. $O_{2} ^{-}$ was minor in comparison with $O^{-}$, and $H^{-}$ was negligible. The production process of $OH^{-}$ was not dissociative electron attachment to $H_{2}$O. The experimental results are consistent with the dominant production of $OH^{-}$ due to dissociative electron attachment to $H_{2}O_{2}$. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6595/aba6a3/pdf |
| ISSN | 09630252 |
| e-ISSN | 13616595 |
| DOI | 10.1088/1361-6595/aba6a3 |
| Journal | Plasma Sources Science and Technology |
| Issue Number | 8 |
| Volume Number | 29 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2020-07-16 |
| Access Restriction | Open |
| Subject Keyword | Journal: Plasma Sources Science and Technology Atomic, Molecular and Chemical Physics Atmospheric Pressure |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics |
