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Investigation of hollow cathode performance for 30-cm thrustersA parametric investigation of 6.35 mm diameter mercury hollow cathodes was carried out in a bell jar. The parameters that were varied were the amount of initial emissive mix, insert position, emission current, cathode temperature, orifice diameter, and mercury flow rate. Flow characteristic curves and performance as a function of time were obtained for the various cathodes. The results of a 3880 hr life test of a main cathode run at 15 amps emission current with no noticeable changes in keeper and collector voltages are also presented.
Document ID
19730022007
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mirtich, M. J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1973
Subject Category
Propulsion Systems
Report/Patent Number
NASA-TM-X-68298
E-7649
Meeting Information
Meeting: Elec. Propulsion Conf.
Location: Lake Tahoe, NV
Country: United States
Start Date: October 31, 1973
End Date: November 2, 1973
Sponsors: AIAA
Accession Number
73N30739
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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