Stark broadening measurement of the electron density in an atmospheric pressure argon plasma jet with double-power electrodes
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)
Characteristics of a double-power electrode dielectric barrier discharge of an argon plasma jet generated at the atmospheric pressure are investigated in this paper. Time-averaged optical emission spectroscopy is used to measure the plasma parameters, of which the excitation electron temperature is determined by the Boltzmann's plot method whereas the gas temperature is estimated using a fiber thermometer. Furthermore, the Stark broadening of the hydrogen Balmer H{sub {beta}} line is applied to measure the electron density, and the simultaneous presence of comparable Doppler, van der Waals, and instrumental broadenings is discussed. Besides, properties of the jet discharge are also studied by electrical diagnosis. It has been found that the electron densities in this argon plasma jet are on the order of 10{sup 14} cm{sup -3}, and the excitation temperature, gas temperature, and electron density increase with the applied voltage. On the other hand, these parameters are inversely proportional to the argon gas flow rate.
- OSTI ID:
- 21476159
- Journal Information:
- Journal of Applied Physics, Vol. 107, Issue 6; Other Information: DOI: 10.1063/1.3330717; (c) 2010 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON
ATMOSPHERIC PRESSURE
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRODES
ELECTRON DENSITY
ELECTRON TEMPERATURE
EMISSION SPECTROSCOPY
EXCITATION
GAS FLOW
HYDROGEN
ION TEMPERATURE
LINE BROADENING
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA JETS
VAN DER WAALS FORCES
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FLUID FLOW
FLUIDS
GASES
NONMETALS
RARE GASES
SPECTROSCOPY