NDLI: Spectroscopic Characterization of Miniaturized Atmospheric-Pressure dc Glow Discharge Generated in Contact with Flowing Small Size Liquid Cathode

Content Provider	Springer Nature Link
Author	Jamróz, Piotr Żyrnicki, Wiesław
Copyright Year	2011
Abstract	The miniaturized atmospheric pressure glow discharge (APGD) generated between a solid electrode and a flowing small size liquid cathode (dimension 2 mm) was investigated here using optical emission spectroscopy. The discharge was studied in an open air atmosphere, and the spectral characteristics of the plasma source was examined. Analysed APGD was operated at a discharge voltage of 1,100–1,700 V, a discharge current of 20 mA and gaps between a solid anode and a liquid cathode in the range from 0.5 to 3.5 mm. The emission intensities of the main species were measured as a function of various experimental conditions, including the solution flow rate, the gap between the electrodes, and the concentration of hydrochloric acid. The excitation temperature, the vibrational temperatures calculated from N$_{2}$, OH, and NO bands, and the rotational temperatures determined from band of OH, N$_{2}$ and NO, were found to be dependent on these experimental parameters. The electron number density was determined from the Stark broadening of H$_{β}$ line. Additionally, the ionization temperature and degree were calculated using the Saha–Boltzmann equation, with the ion to atom ratio for magnesium (MgII/MgI). The results demonstrated that T $_{exc}$(H), T $_{vib}$(N$_{2}$), T $_{vib}$(OH), T $_{vib}$(NO) and T $_{rot}$(OH) were well comparable (~3,800–4,200 K) for selected plasma generation conditions (gap ≥2.5 mm, HCl concentration ≥0.1 mol L$^{−1}$), while the rotational temperatures determined from band of N$_{2}$ (~1,700–2,100 K) and band of NO (~3,000 K) were considerably lower. The electron number density was evaluated to be (3.4–6.8) × 10$^{20}$ m$^{−3}$ and the ionization temperature varied, throughout in the 4,900–5,200 K range.
Starting Page	681
Ending Page	696
Page Count	16
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	31
Issue Number	5
e-ISSN	15728986
Language	English
Publisher	Springer US
Publisher Date	2011-07-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atmospheric pressure glow discharge Optical emission spectrometry Plasma diagnostics Liquid cathode Miniaturized plasma source Characterization and Evaluation of Materials Mechanical Engineering Mechanics Inorganic Chemistry Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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