Download or read book HIGH TEMPERATURE VAPOR FILLED THERMIONIC CONVERTER Quarterly Technical Progress Report July 1 Through September 30 1962 written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The post-test analysis of Cell E was completed with the exception of the microprobe analysis of the emitter structure. Interpretation of data from the analysis indicated the necessity of improving the cleanliness of future cell assemblies and especially the need for techniques to determine the emitter condition throughout final assembly. A 10 UC-90 ZrC emitter was installed in Cell F. Thermocouple installation and calibration and high-temperature vacuum emission tests are being conducted prior to the final closure of the cell. A second cell structure, Cell G, is on hand and an emitter will be installed pending the results of surface preparation. Vacuum emission studies carried out under other contracts on three UC compositions, 10 UC--90 ZrC, 30 UC--70 ZrC, and 90 UC--10 ZrC, demonstrate that emission behavior is essentially independent of bulk uranium content. Intentional poisoning'' of the surface of sample emitters was produced by exposure to air at room temperature. These findings were substantiated on the Mark V-E and V-F emitters. It was concluded, therefore, that the emitter surface must be activated in addition to providing a clean cell environment during operation. (auth).

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Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1964 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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