Investigation of Energy Transfer Processes in Molecular Gas Discharges.
Final rept. 1 Jan 70-30 Jun 72,
UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CONN
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Collision processes leading to the formation of atomic nitrogen in N2-He and N2-CO2-He laser discharges have been identified as being of major importance in determining discharge characteristics. In order to identify the physical mechanisms leading to N2 dissociation, analytical techniques were used to determine electron energy distributions, from which rates of electron energy transfer associated with the various vibrational, electronic, ionization and dissociation processes were determined. Carefully controlled experimental measurements were made to determine N-atom fluxes as a function of discharge parameters. The measured dissociation rate and its dependence on electron density, N2 density, and time spent within the discharge suggested that both direct and multistep processes contributed to the N-atom production. These results, when coupled with the analytically determined energy transfer rates, indicate that only direct processes are important sources of N-atom production for conditions typical of CO2 laser discharges. Author
- Lasers and Masers