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Number of results
1993 | 84 | 2 | 215-228
Article title

Mesure de la Temperature Basees sur l'Observation du Premier Systéme Negatif de l'Azote

Content
Title variants
EN
Temperature Measurements Based on the First Negative Spectrum of Nitrogen
Languages of publication
FR EN
Abstracts
EN
Noisy, non-resolved emission spectra of the (0,0) 391.4 nm N_{2}^{+} molecular band are employed for the rotational (and in some case vibrational) temperature evaluation in different sources in the range of 320-7900 K when the apparatus function of the recording system is unknown. The following sources are examined: an ovoid-shaped transferred arc at atmospheric pressure, a low-pressure transferred arc, a high-voltage high-pressure electric discharge, a low-pressure radio-frequency discharge, and an atmospheric pressure laminar plasma jet. The described method is based on a normalization of the experimental spectrum with respect to the (0,0) band-head amplitude followed by a point-to-point comparison of the real spectrum with respect to a computer simulated spectrum using the best-square fit criterion. This criterion is found as the good one: the relative error on temperature evaluation had the same order of magnitude as the noise-to-signal ratio, even if the last one was relatively high. It was also found that the rotational and vibrational temperatures in the radio-frequency discharge are very different, which indicates an out of thermodynamic equilibrium characteristic of such a discharge. The proposed method of temperature evaluation is shown as quite precise and simple to use for even the non-spectroscopists.
Keywords
Year
Volume
84
Issue
2
Pages
215-228
Physical description
Dates
published
1993-08
received
1992-08-15
(unknown)
1993-05-18
References
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv84z201kz
Identifiers
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