THE DEVELOPMENT OF A LOW-WORK-FUNCTION COLLECTOR FOR THERMIONIC ENERGY CONVERTERS.
Annual technical summary rept. no. 1, 15 Dec 6215 Dec 63,
RADIO CORP OF AMERICA LANCASTER PA
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The construction and evaluation of a unique device for studying collectors of thermionic converters operating in the Ball-of-Fire mode are described. The test vehicle contains one emitter and a rotating disc on which six collectors are mounted. Without disturbing the vacuum condition, each collector may in turn be brought adjacent to the emitter and the electrode combination can be operated as a converter. The emitter temperature, collector temperature, cesium reservoir temperature, and interelectrode spacing may all be independently varied and measured. Preliminary data for the first set of collectors evaluated in this device are presented indicating that arccast tungsten produces the highest power and polycrystaline molybdenum produces the highest voltage at the highest power. Author