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Hollow cathodes in high pressure arc dischargesAn orified hallow cathode was tested at high pressure to improve lifetime and efficiency in arcjet thrusters. It is indicated that the arc would not operate with emission from the insert above 200 torr in nitrogen regardless of insert material, orifice diameter, or gas flow direction. Emission occurred from the insert in argon and xenon although it could not be ascertained whether diffuse or spot emission existed within the cathode. Over the extended range of configurations and operating parameters explored the desired diffuse emission mode could not be obtained at high enough pressures for orified hollow cathodes to operate in the range which is considered for arcjet applications.
Document ID
19860029708
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hardy, T. L.
(NASA Lewis Research Center Cleveland, OH, United States)
Curran, F. M.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1985
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA PAPER 85-2035
Accession Number
86A14446
Distribution Limits
Public
Copyright
Other

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