| Autor: |
Brown, Michael S., Forlines, Robert A., Ganguly, Biswa N. |
| Zdroj: |
Journal of Applied Physics; 5/15/2005, Vol. 97 Issue 10, p103302-1-103302-6, 6p, 1 Diagram, 3 Graphs |
| Abstrakt: |
Optical and electrical measurements are performed in methane/diluent mixtures in a 250-ns pulsed-dc discharge using a fast-rise-time pulser. In particular, emission and laser-induced-fluorescence studies of CH produced by direct-electron-impact dissociation reveal the postdissociation kinetics of CH as well as a means of estimating the CH density. In a 20-Torr 10%/20%/70% mixture of argon/methane/nitrogen, the instantaneous CH density is determined to be 2.1×1013 cm-3 at the end of the steady-state voltage and current condition. Kinetics analysis reveals that neutral chemistry with methane is the largest loss process for the CH fragments. Analysis of N2(C-B) rotational temperatures indicates that less than 30% of the input electrical energy is deposited as heat in the gas, with the balance going toward dissociation, excitation of internal molecular states, and ionization. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
