Electron density and temperature measurement method by using emission spectroscopy in atmospheric pressure nonequilibrium nitrogen plasmas
- Department of Nuclear Engineering, College of Engineering, Seoul National University, Seoul 151-742 (Korea, Republic of)
A novel spectroscopic method is proposed for the measurement of electron density and temperature in atmospheric pressure dielectric barrier discharges using nitrogen gas. Simplified collisional-radiative models for the electronic and the vibrational states yield two separate continuity equations as a function of the electron density and the temperature with the coefficients expressed in terms of rotational temperature, vibrational temperature, and emission intensity ratio between the first positive system and the second positive system of nitrogen molecules. The electron density and the temperature in nonequilibrium atmospheric pressure plasmas can be determined by solving the continuity equations with the coefficients estimated from the spectroscopic measurements. It was confirmed by applying to a high power dielectric barrier discharge, where the measured plasma parameters were in good agreement with the estimation by using the electron conductivity of the discharge.
- OSTI ID:
- 20860264
- Journal Information:
- Physics of Plasmas, Vol. 13, Issue 9; Other Information: DOI: 10.1063/1.2338282; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COLLISIONS
CONTINUITY EQUATIONS
DIELECTRIC MATERIALS
ELECTRIC DISCHARGES
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
EMISSION SPECTROSCOPY
ION TEMPERATURE
MOLECULES
NITROGEN
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
RADIATION TRANSPORT
TEMPERATURE MEASUREMENT
VIBRATIONAL STATES
YIELDS