Nitrogen oxide {gamma}-band emission from primary and secondary streamers in pulsed positive corona discharge
Journal Article
·
· Journal of Applied Physics
- Department of Electrical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)
Nitrogen oxide {gamma}-band emissions (A{sup 2} {sigma}{sup +}{yields}X{sup 2} {pi}) from primary and secondary streamers are observed in O{sub 2}/N{sub 2} and NO/N{sub 2} pulsed positive corona discharges with the aim of investigating the production of NO molecules and N{sub 2}(A{sup 3} {sigma}{sub u}{sup +}) metastables in these primary and secondary streamers. The spatial distribution of the NO-{gamma} emission shows that the NO-{gamma} emission is mostly observed in the secondary streamer propagation area of the O{sub 2}/N{sub 2} discharge. That is, NO molecules are mainly produced in the secondary streamer in the O{sub 2}/N{sub 2} discharge. On the other hand, in the NO/N{sub 2} discharge, the NO-{gamma} emission is observed in the primary streamer propagation area. This result indicates that N{sub 2}(A{sup 3} {sigma}{sub u}{sup +}) metastables are mostly produced in the primary streamer because the NO-{gamma} emission is observed following the process NO(X{sup 2} {pi})+N{sub 2}(A{sup 3} {sigma}{sub u}{sup +}){yields}NO(A{sup 2} {sigma}{sup +})+N{sub 2}(X{sup 2} {sigma}{sub g}), where NO(X{sup 2} {pi}) is distributed uniformly in the background gas in the NO/N{sub 2} discharge.
- OSTI ID:
- 20664954
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 97; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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