In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 50, No. 7R ( 2011-07-01), p. 076101-
Abstract:
Rotational Raman scattering was adopted for measuring the spatiotemporal evolutions of the rotational temperature ( T r ) and the density ( n N2 ) of molecular nitrogen at the electronic ground state in spark-plug assisted atmospheric-pressure microwave discharge. The rotational temperature had a spatial distribution with the peak at the plasma center. The temporal evolution of T r suggests a long confinement time of heat in this plasma source. Because of the long confinement time of heat, the plasma was in a nonequilibrium state for at least ∼1 ms after the initiation of the discharge. We observed the depletion of n N2 as well as the decrease in the partial pressure of N 2 ( P N2 ). They were more significant at a longer distance from the plasma center. The depletion of n N2 at the plasma center was roughly explained by the increase in T r . On the other hand, we have speculated that the significant decreases in n N2 and P N2 in the peripheral region of the plasma is owing to dissociation of N 2 followed by nitriding of solid surfaces.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.50.076101
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2011
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
