Electron Beam Analysis of the Properties of Molecular Nitrogen and Nitric Oxide in the AFFDL 2-Foot Electrogasdynamics Facility
Final rept. 1 Dec 1971-22 Aug 1973
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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The electron beam fluorescence technique was used to measure the vibrational temperature and number density of molecular nitrogen and nitric oxide at the exit of the 7-inch conical nozzle of the Air Force Flight Dynamics Laboratory 2-Foot Electrogasdynamics Facility. In addition, the vibrational temperature and species concentration of nitric oxide were measured at the exit of the 19-inch conical nozzle. Theoretical results assuming finite-rate chemical nonequilibrium were compared with the experimental data. The excitation- emission mechanisms for electron beam excitation of the NO gamma system in No- air and NO-nitrogen mixtures were investigated and it is shown that the excitation is dominated by secondary electrons resulting from beam-induced ionization of molecular nitrogen. Reasons for the discrepancies between the theoretical and experimental results were examined.
- Atomic and Molecular Physics and Spectroscopy