NDLI: Correlation of fixed-spacing thermionic converter performance with variable-spacing test vehicle data

Content Provider	IEEE Xplore Digital Library
Author	Merrill, O.S.
Copyright Year	1963
Abstract	Seven fixed-spacing thermionic converters with planar electrodes and one with cylindrical electrodes were designed and built on the basis of data from a planar variable-spacing thermionic test vehicle operated at emitter temperatures of 1600-2000 K in 100 degree increments. Electrodes in the variable-spacing device and in five of the planar converters were of polycrystalline rhenium; those in the other two planar converters, and in the cylindrical converter were of vapor-deposited rhenium. The design performance of all fixed-spacing planar converters, compared with the test vehicle data, fell within 6.5 percent of predicted values; performance of the cylindrical converter was within 1.1 percent of the predicted value. The performance of the cylindrical converter was also compared with that of a corresponding planar converter and was found to be in excellent agreement. The converter designed for a 2000 K emitter temperature had completed 11 600 hours of life testing as of October 15, 1958, at a constant power output of approximately 27 W/cm²at 0.77 volt. It was also observed that the design points for the five planar converters with polycrystalline rhenium electrodes fell on a straight line when optimum power output was plotted as a function of emitter temperature.
Sponsorship	IEEE Electron Devices Society
Starting Page	679
Ending Page	686
Page Count	8
File Size	1101416
File Format	PDF
ISSN	00189383
Volume Number	16
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1969-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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