Measurements of N2(A) by pulsed cavity ringdown spectroscopy in repetitively pulsed nanosecond discharges

M. Janda*, G. D. Stancu, T. G. Spence, C. Harb, F. Kaddouri, D. Pai, D. A. Lacoste, C. O. Laux

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We present here results from the measurements of metastable N 2(A) species in nanosecond repetitively pulsed (NRPP) discharge in N2 and air, obtained by using pulsed cavity ring-down spectroscopy (CRDS) at 770 nm. Despite the small plasma volume (1-10 mm3) and short lifetime of studied plasma species, CRDS enabled us to obtain spectra with spectral resolution down to 1 pm. The temporal variations of N2(A) concentration in a nitrogen plasma were measured and absolute concentrations of N2(A) in nitrogen and air plasmas were determined. These results were then used to validate a kinetic model, which already showed good agreement with the spatial and temporal evolution of other excited state species such as N2(B), N2(C), N2 +(B), NO(A) and O(3p 5P) measured using intensity calibrated emission spectroscopy.

Original languageEnglish (US)
Title of host publicationGD 2008 - 17th International Conference on Gas Discharges and Their Applications
Pages385-388
Number of pages4
StatePublished - 2008
Externally publishedYes
Event17th International Conference on Gas Discharges and Their Applications, GD 2008 - Cardiff, United Kingdom
Duration: Sep 7 2008Sep 12 2008

Other

Other17th International Conference on Gas Discharges and Their Applications, GD 2008
CountryUnited Kingdom
CityCardiff
Period09/7/0809/12/08

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

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