Characteristics of a Normal Glow Discharge Excited by DC Voltage in Atmospheric Pressure Air |
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Affiliation: | [1]College of Physics Science and Technology, Hebei University, Baoding 071002, China [2]Key Laboratory of Photo-Electronics Information Materials of Hebei Province, Baoding 071002, China |
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Abstract: | Atmospheric pressure glow discharges were generated in an air gap between a needle cathode and a water anode.Through changing the ballast resistor and gas gap width between the electrodes,it has been found that the discharges are in normal glow regime judged from the currentvoltage characteristics and visualization of the discharges.Results indicate that the diameter of the positive column increases with increasing discharge current or increasing gap width.Optical emission spectroscopy is used to calculate the electron temperature and vibrational temperature.Both the electron temperature and the vibrational temperature increases with increasing discharge current or increasing gap width.Spatially resolved measurements show that the maxima of electron temperature and vibrational temperature appeared in the vicinity of the needle cathode. |
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Keywords: | atmospheric pressure glow discharge positive column optical emission spectroscopy electron temperature vibrational temperature |
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