Time-resolved laser-induced fluorescence of atomic nitrogen in a free-burning arc discharge

Author

Snyder, Stuart C. ; LeRoux, Anna M.

Author_Institution

Idaho Nat. Eng. & Environ. Lab., Idaho Falls, ID, USA

Volume

25

Issue

5

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

824

Lastpage

827

Abstract

An experiment to detect ground-state atomic nitrogen in an atmospheric-pressure argon-nitrogen free-burning 200 A arc by time-resolved two-photon laser-induced fluorescence is described. The time decay of the fluorescence pulses showed that quenching of the laser-excited state is rapid. Upper bound estimates of the pulse-decay time were determined as a function of radius, and were found to be on the order of 1 ns, and to decrease with increasing radii. The implications of rapid quenching of the laser-excited state to the application of laser-induced fluorescence as a plasma diagnostic tool are discussed

Keywords

arcs (electric); argon; fluorescence; ground states; nitrogen; plasma diagnostics; radiation quenching; time resolved spectra; two-photon spectra; 1 atm; 200 A; Ar-N₂; Ar-N₂ free-burning arc discharge; atmospheric-pressure; atomic N; fluorescence pulses time decay; ground-state; laser-excited state quenching; plasma diagnostic; time-resolved two-photon laser-induced fluorescence; upper bound estimates; Arc discharges; Atom lasers; Atomic beams; Atomic measurements; Fluorescence; Laser excitation; Nitrogen; Plasma applications; Plasma chemistry; Plasma measurements;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.649576

Filename

649576