The plasma and afterglows of N2 and Ar-N2 HF discharges are presently studied to precise the N-atom production in afterglow conditions at high gas pressure (up to the atmospheric gas pressure). The production of N-atom density has been analyzed in Ar-N2 high-pressure flowing afterglows after HF plasmas at a frequency from 13.6 Mhz to 2450 MHz. The plasma length increased when the HF frequency decreased from 2450 to 13.6 MHz and by lowering x in the Ar-xN2 gas mixture. It was found that the N+N recombination on the N2(B,v’) states was reduced by 2.5 for v’=11, by 10 for v’=8 and by 30 for v’=0 by going from pure N2 to Ar-2%N2. The production of N and C-atoms in a double Ar-N2 and Ar-CH4 HF flowing afterglows was in the ranges of 1015cm-3 and 1012cm-3, respectively. In Ar-N2-xCH4 with x=10-3 – 10-2 there was a drop of N and C-atoms at x=10-2 which should result in N+CH3 reactions. The CH3 density was about 4 1011 cm-3 in an Ar-17%N2 1%CH4 gas mixture at 14 Torr.
Author
(s) Details
André
Ricard
LAPLACE, Université de Toulouse, CNRS, INPT, UPS, 118 route de
Narbonne, 31062 Toulouse Cedex 9, France.
Please see the book here:- https://doi.org/10.9734/bpi/mono/978-93-49473-93-5/CH20
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