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High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes)

An International Journal

ISSN for PRINT: 1093-3611

Institutional price:	$604.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2006, Volume10

173 pages

DOI: 10.1615/HighTempMatProc.v10.i2

Issue price - $155.00

ACQUISITION AND MODELING OF A SPECTRUM IN A NON THERMAL EQUILIBRIUM PLASMA FORMED IN AIR WITH WATER

P. Andre
LAEPT CNRS UMR 6069 - Phys. Bat. 5 - Universite Blaise Pascal - 24, Avenue des Landais - 63177 Aubiere Cedex - France

Yu. Barinov
A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Polytechnicheskaya 26, St Petersburg, 194021, Russia

G. Faure
LAEPT, Blaise Pascal University, UMR 6069 CNRS, bat. Physique 5, 24 avenue des Landais 63177 Aubiere Cedex, France

V. Kaplan
A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Polytechnicheskaya 26, St Petersburg, 194021, Russia

S. Shkol'nik
A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Polytechnicheskaya 26, St Petersburg, 194021, Russia

ABSTRACT

Spectra in the range of 365−385 nm, corresponding to the Schumann-Runge system of O₂ (B³Σ⁻_u− X³Σ⁻_g) and to the second positive system of N₂ (C³Π_u− B³Π_g) are measured by optical emission spectroscopy in a discharge with liquid non-metallic electrodes (DLNME) in air with water at atmospheric pressure. They are simulated theoretically. This discharge generates a non-equilibrium plasma. In this paper, we first describe the experimental set up. Then, we explain the method of spectra simulation. By comparison of measured and simulated spectra, we determine the rotational and vibrational temperature and the ratio between densities of two upper electronic quantum levels of the two considered systems. The possible mechanism of spectra formation is discussed.