Investigation of Plasma Excitation. Volume III. Advanced Optical Diagnostics of Plasmas.
Abstract
A fourier transform infrared spectrometer was used to identify infrared absorption spectra of impurities that might be present in carbon dioxide laser discharges. Spectral regions free from interference from the primary constituents and common impurities such as water vapor were identified for several of the nitrogen oxides, and the detection sensitivities were determined. This information was used in a study of impurity buildup during discharges in an electron-beam excited closed cycle (EBCC) system and in a TEA CO2 laser. It was found that after an hour of irradiation in the continuous EBCC system, the oxides of nitrogen had built up to the ten parts per mission range while the carbon monoxide concentration was of the order of a few hundred parts per million. When the initial gas mix contained oxygen, the concentration of carbon monoxide and the nitrogen oxides increased. The addition of hydrogen to an oxygen free gas mix was found to produce water vapor at about ten percent of the initial hydrogen concentration, increase the production of N20 and of CO, and decrease the production of NO and NO2. A technique has been developed for determining the rotational temperature and vibrational population distribution of non-homonuclear molecules under nonequilibrium conditions. The technique was applied to carbon monoxide under the conditions present in an electrical discharge.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1981
- Accession Number
- ADA105496
Entities
People
- C. A. Dejoseph
Organizations
- Universal Energy Systems