INVESTIGATION OF CAPILLARY EMITTER THERMIONIC CONVERTERS
Rept. for 15 May 1951-15 Aug 1963
GENERAL MOTORS CORP INDIANAPOLIS IN ALLISON GAS TURBINE DIV
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A random current theoretical model is formulated to describe the emission of ions and electrons from a capillary thermionic emitter. Extensive experimental results from monocapillary and multicapillary devices are shown to be in good agreement with the theory. Practical power densities of 5 to 15 wattssquare cm were obtained between 1900 and 2100 degrees K. A modified capillary emitter in which no cesium flow is required was also investigated and found to agree with the random current model. Ion current measurements, high frequency oscillations, and spectroscopic data are used to interpret the operating conditions of the capillary emitter. Technology developments are reported on the subjects of emitter fabrication and chemical vapor deposition.
- Anatomy and Physiology