Temperature Measurements in Nitrogen and Nitrogen-Oxygen Plasmas
Abstract
Using as a source a dc subsonic plasma jet operating in nitrogen and in nitrogen-oxygen mixtures at atmospheric pressure, emission coefficients of the N2(2+)(0,0) lambda 3371 neutral molecule band, N2(+)(1-)(0,0) lambda 3914 ionized molecular band, lambda 7468 NI atomic line, and the electron continuum have been measured over the temperature range of 3800 to 10000K. The emission coefficients of the discrete radiation, calibrated on an absolute scale, were used to calibrate the simultaneously measured electron continuum over the temperature range. Approximate analytical treatments were used to extrapolate the calibrated continuum curves to lower temperatures where discrete radiations cannot be observed. The experimental results show considerably higher continuum emission coefficients at low temperature than can be accounted for by any existing theoretical treatments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1970
- Accession Number
- AD0714059
Entities
People
- F. L. Kelly
- G. Bedjai
- H. N. Olsen