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Atmospheric pressure plasma jet in Ar and mixtures: Optical emission spectroscopy and temperature measurements
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Image of FIG. 1.
FIG. 1.

Experimental setup and visual view of the plasma jet.

Image of FIG. 2.
FIG. 2.

Lissajous diagram showing the voltage-charge variation in DBD plasma jet (a) pure Ar, (b) 0.05%, and (c) 0.76%.

Image of FIG. 3.
FIG. 3.

ICCD images of plasma afterglow in Ar gas at . Time, presented in the left corners of the images, is related to moment where the current of the discharge reaches maximum value.

Image of FIG. 4.
FIG. 4.

Axial emission spectra of the jet in Ar and mixtures with 0.05% and 0.76% . The input power is fixed on 12.8 W. Spectra are shifted for better representations.

Image of FIG. 5.
FIG. 5.

Peak emission intensity of excited species as a function of water content in the discharge (fixed power of 12.8 W).

Image of FIG. 6.
FIG. 6.

Space resolved OES of plasma (0.76% ) along with comparison of space resolved intensity of Ar, OH, and lines.

Image of FIG. 7.
FIG. 7.

Logarithm of intensity ratio for different Ar lines as a function of considering correction for photon absorption.

Image of FIG. 8.
FIG. 8.

Fitting of the experimental and simulated spectrum of OH radical. , , emission has been recorded in the position 5 mm after the edge of the capillary, pure Ar, and .

Image of FIG. 9.
FIG. 9.

Boltzmann plot of the OH (0-0) transition in plasma of mixture containing 0.05% of water.


Generic image for table
Table I.

Most intensive emission lines which detected in axial spectra of the jet.

Generic image for table
Table II.

The space resolved OH rotational temperature for Ar and mixtures determined by the Boltzmann plot technique. Error of the method is ±50 K.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Atmospheric pressure plasma jet in Ar and Ar/H2O mixtures: Optical emission spectroscopy and temperature measurements