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Hollow cathodes with BaO impregnated, porous tungsten inserts and tipsThe technology of impregnated materials is described and some inherently advantageous characteristics of impregnated cathodes are discussed. Thermionic emission measurements are presented for oxide coated and impregnated cathodes. Five cathode configurations with barium oxide impregnated porous tungsten inserts and/or tips have been fabricated and tested. Reliability, durability, and stability of operation are characterized. One of the cathodes has accumulated over 9000 operational hours, another has been cycled on and off more than 900 times.
Document ID
19740027960
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hudson, W. R.
Weigand, A. J. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Subject Category
Auxiliary Systems
Report/Patent Number
AIAA PAPER 73-1142
Meeting Information
Meeting: Electric Propulsion Conference
Location: Lake Tahoe, NV
Start Date: October 31, 1973
End Date: November 2, 1973
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
74A10710
Distribution Limits
Public
Copyright
Other

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