Development of an Electronics Package for use in Real Time, Optically Thin, Isothermal Spectral Line Intensity Ratio Temperature Measurements.
Interim technical rept. Mar 73-Jan 74,
AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO
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An analog electronics package or calculator has been constructed which calculates in real time the temperature of an isothermal region slab of copper contaminated equilibrium air from the intensity ratio of two optically thin copper spectral lines. This calculator is capable of being used for temperature measurements in the range of 3000 to 10,000 K while using the intensity ratio of the 51065153A copper atomic lines. The basic design takes into account the possibility of a significant background i.e., continuum intensity in the neighborhood of the copper spectral lines. For a given nominal temperature setting, the package possesses simultaneously a response time of 1 to 2 microsec, accepts temperature variations of or - 20, accepts absolute intensity changes in the 5106 spectral line of one order of magnitude, and still maintains a calculated temperature accuracy of or - 3. While the present emphasis has been placed on the use of the 51065153A copper atomic lines in the temperature range of 3000 to 10,000 K, the calculator can be applied to any isothermal slab of gas which possesses a species with a suitable pair of optically thin spectral lines. Author
- Electrical and Electronic Equipment