THE DEVELOPMENT OF AN AUXILIARY ELECTRODE THER MIONIC CONVERTER.
RADIO CORP OF AMERICA LANCASTER PA
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The program covered in this report includes the development of a cylindrical converter which em ploys an emitter thermally bonded to, but elec trically insulated from, a central heat source tubing suitable for liquid metal heating. This converter was designed, fabricated, and tested to a power level in excess of one watt per sq. cm. at an operating temperature of 1200 C with an efficiency of approximately 5. Cesium com patibility studies were performed to extend the knowledge of materials useful for the design and fabrication of thermionic converters. Geom etry studies were made to determine the best emitter-collector configuration for converter operating at 1200 in the Ball-of-Fire mode. The Saw Tooth configuration of electrodes was developed and demonstrated to give a higher power density than the plain cylindrical geom etry on a projected area basis. More consis tent and stable converters were fabricated by improving processing and exhaust procedures and by employing materials of higher purity. Author