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Design and testing a high fuel volume fraction, externally finned, thermionic emitter.A prototypical, high fuel volume fraction, thermionic emitter body was designed and tested. The emitter body is all tungsten, with a 1.40-cm ID, a 3.23-cm OD, and eight full-length axial fins. The emitter thickness is 0.15 cm while the fins and outer clad are 0.075 cm thick. Different methods of fabrication were used in making the test samples. Stress analysis was performed with a three-dimensional elastic code. Thermal testing of the samples, duplicating calculated radial temperature gradients, heatup and cooldown rates, and emitter body temperatures in operation, was performed with no structural failures noted (six heatup and cooldown cycles per sample). Further emitter analysis and testing is planned.
Document ID
19720050920
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Peelgren, M. L.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Ernst, D. M.
(Thermo Electron Corp. Waltham, Mass., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Subject Category
Auxiliary Systems
Meeting Information
Meeting: Annual Thermionic Conversion Specialist Conference
Location: San Diego, CA
Start Date: October 4, 1971
End Date: October 6, 1971
Accession Number
72A34586
Distribution Limits
Public
Copyright
Other

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