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Nitrogen dissociation degree in the diffusion region of a helicon plasma source obtained by atomic lines to molecular band intensities ratio
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10.1063/1.2777998
/content/aip/journal/jap/102/5/10.1063/1.2777998
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/5/10.1063/1.2777998

Figures

Image of FIG. 1.
FIG. 1.

Electron-impact excitation cross sections from ground level of the atomic state (Ref. 27), (Ref. 33), and (Ref. 30) molecular electronic states, and from excited state (Ref. 34).

Image of FIG. 2.
FIG. 2.

Experimentally obtained electron energy probability functions for (a) -mode and (b) -mode operation regimes.

Image of FIG. 3.
FIG. 3.

(a) Experimentally obtained band sequence of the first positive system; (b) synthetically generated sequence for the best fit vibrational temperature.

Image of FIG. 4.
FIG. 4.

Relative vibrational distributions of (a) electronic state obtained from integrated band intensities of sequences; (b) electronic state calculated based on relative vibrational distribution of electronic state and Franck-Condon factors.

Image of FIG. 5.
FIG. 5.

Experimental 4-2 band spectra (black line) and corresponding numerically generated spectra (gray line) for (a) -mode and (b) -mode operating regimes; corresponding triplet lines obtained by difference between experimental spectra and generated spectra (c) and (d).

Image of FIG. 6.
FIG. 6.

Determination of the dissociation degree from the plot of atomic line∕molecular band intensities ratio vs characteristic line parameter: squares, -mode regime; circles, -mode regime.

Image of FIG. 7.
FIG. 7.

Linear dependence of line∕band intensities ratio obtained from lines and band head heights against the same ratio obtained from integrated intensities.

Tables

Generic image for table
Table I.

Rate coefficients for electron-impact excitation of , , and states.

Generic image for table
Table II.

Spectral characteristics of the triplet lines (Ref. 39).

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/content/aip/journal/jap/102/5/10.1063/1.2777998
2007-09-14
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nitrogen dissociation degree in the diffusion region of a helicon plasma source obtained by atomic lines to molecular band intensities ratio
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/5/10.1063/1.2777998
10.1063/1.2777998
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