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Title: Characteristics of atmospheric-pressure non-thermal N{sub 2} and N{sub 2}/O{sub 2} gas mixture plasma jet

An atmospheric-pressure non-thermal plasma jet driven by high frequency alternating current and operating on N{sub 2} and N{sub 2}/O{sub 2} gas mixture is investigated. The plasma jet can reach 55 mm in length at a gas flow rate of 2500 l/h. The gas temperature at a distance of 4 mm from the nozzle is close to room temperature. Optical emission spectroscopy is employed to investigate the important plasma parameters such as the excited species, rotational temperature, vibrational temperature, and excitation temperature under different discharge conditions. The results show that the plasma source operates under non-equilibrium conditions. The absolute irradiance intensity of the vibrational band N{sub 2}(C-B) in the active region is measured. Taking into account the irradiance intensity of N{sub 2}(C-B,0-0) and N{sub 2}(B-X,0-0) as well as measured current, the electron density, which is determined by considering direct and step-wise electron impact excitation of nitrogen emission, reaches a maximum value of 5.6 × 10{sup 20}/m{sup 3}.
Authors:
; ; ; ; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. Institute of Plasma Physics, Chinese Academy of Sciences, P. O. Box 1126, Hefei 230031 (China)
  2. (China)
  3. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)
Publication Date:
OSTI Identifier:
22275697
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALTERNATING CURRENT; ATMOSPHERIC PRESSURE; ELECTRON COLLISIONS; ELECTRON DENSITY; ELECTRONS; EMISSION SPECTROSCOPY; EXCITATION; GAS FLOW; MIXTURES; NITROGEN; PHOTON EMISSION; PLASMA JETS; RADIANT FLUX DENSITY; TEMPERATURE RANGE 0273-0400 K; VIBRATIONAL STATES