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Thermionic performance of a cesium diminiode with relatively impure 110-tungsten electrodesThermionic performance data from a miniature plane cesium diode (diminiode) with 110-tungsten electrodes are presented. The diminiode has a guard-ringed collector and a spacing of 0.23 mm. The data were obtained by using a computerized acquisition system. The diode was tested at increments between 1700 and 1900 K for the emitter, 694 and 1101 K for the collector, and 519 and 650 K for the reservoir. A maximum power density of 4.5 W/sq cm was obtained at an emitter temperature of 1900 K. This relatively low output probably results from high carbon and sodium impurities in the electrode materials.
Document ID
19740019063
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Smith, A. L. (NASA Lewis Research Center Cleveland, OH, United States)
Manista, E. J. (NASA Lewis Research Center Cleveland, OH, United States)
Morris, J. F. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1974
Subject Category
Nuclear Engineering
Report/Patent Number
NASA-TM-X-3021
E-7894
Accession Number
74N27176
Funding Number(s)
PROJECT: RTOP 502-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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