Evaluation of a thermionic diode with an integral guard ring
Thermionic diode with integral guard ring, measuring emitter and collector work functions and heat transfer
Shimada, K.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Some investigations of refractory metal systems of thermionic interest
Refractory metal thermionic emitter-support systems, measuring surface interdiffusion at high temperatures
Horner, M. H.↗
Thermionic Diode Kinetics Experiment - Operation and results
Thermionic Diode Kinetics Experiment analog simulation results concerning coupling, burnout, startup, etc
Davis, J. P.↗
The thermionic diode as a high-temperature switch
Cs vapor thermionic diodes with low temperature dual mode characteristics applicable as switching elements in DC to AC power conditioner
Luebbers, S. S.↗
Thermionic reactor ion propulsion spacecraft for unmanned outer planet exploration
Thermionic reactor electric propulsion for unmanned outer planets exploration, discussing spacecraft design, launch vehicle, weight factors, etc
Davis, J. P.↗
Thermionic reactor systems for electric propulsion
Thermionic reactor electric spacecraft propulsion system for unmanned outer planets missions, investigating voltage and radiator temperature effects on weight
Mondt, J. F.↗
Conceptual design of a 150 Kwe out-of-core nuclear thermionic converter system
Nuclear thermionic systems conceptual design with converters outside reactor to reduce weight
Breitwieser, R.↗
A design optimization of an out-of-core thermionic converter
Design optimization of out-of-core cylindrical thermionic converter module with heat pipes and integral finned radiator
Williams, R. M.↗
A split-core heat pipe reactor concept for an out-of-core thermionic power system
Design and operation of split fueled cores with axial heat pipes for 350 kwe out-of-core thermionic power converter system
Lantz, E.↗
A 120 kWe thermionic reactor ion propulsion spacecraft for the Comet Halley rendezvous mission
Externally fueled thermionic reactor power plant incorporation into unmanned ion propulsion spacecraft
Prickett, W. Z.↗
Radioisotope thermionic generator /RTIG/
Impact resistant power packages for unmanned planetary probe landers, discussing radioisotope thermionic multiconverter array optimal configuration
Rouklove, P.↗
Reactor simulator runs with thermionic diode kinetics experiment
Open loop transient analysis of thermionic diode kinetics experiment with analog computer nuclear reactor simulator
Gronroos, H. G.↗
Design, fabrication, and testing of a full-length external-fuel thermionic converter
Double ended full length external fuel thermionic converter, describing component fabrication, assembly sequence, joining methods, vacuum test procedures and converter load control
Giorgio, F.↗
Design, fabrication and testing of externally configured thermionic diodes
Design, fabrication and testing of electrically heated externally configured thermionic diodes with emitter using mandrel side of CVD fluoride tungsten for electrode surface
Ernst, D. M.↗
Fabrication and evaluation of an out-of-core thermionic converter module
Out-of-core heat pipe heated and cooled thermionic converter module mechanical design, fabrication and subcomponent performance evaluation
Kroeger, E. W.↗
A design study of a 350 kWe out-of-core nuclear thermionic converter system
Out-of-core nuclear thermionic converter system design feature concerning heat pipes, vapor-cooled radiators, modularity and reliability
Breitwieser, R.↗
Measurements of plasma parameters in a simulated thermionic converter
Cesium-filled thermionic energy converters are examined as candidate electrical energy sources in spacecraft requiring tens to hundreds of kilowatts of electric power. The high operating temperatures necessary for a large specific power and high efficiency inevitably impose stringent constraints on the converter fabrication to achieve the desired reliability of the power system. The converter physics for reducing operating temperatures and cesium plasma losses are studied to achieve high reliability without sacrificing the power performance of the converters. Various cesium parameters which affect the converter performance are: (1) electron temperatures, (2) plasma ion densities, and (3) electric potential profiles. These were investigated using a Langmuir probe in a simulated converter. The parameters were measured in different cesium discharge modes.
Shimada, K.↗
Parametric testing of an externally configured thermionic converter
A 25.4-cm long externally configured converter was performance tested by electrically heating the emitter to simulate reactor thermal power input. The measured maximum output power was limited by the maximum input power available from the electric RF induction heater. With maximum heater input power, the converter electric output was 178 W (1.95 W/sq cm) at an emitter temperature of 1946 K. This electric output power was smaller than expected. A reactor-core-length (25.4-cm long) cylindrical thermionic converter power and maintaining the emitter-to-collector gap without shorting are of major importance to the feasibility of a 25.4-cm-long reactor fuel element. The emitter of the converter is located externally to the collector to increase the fuel-volume fraction and to allow redundant collector cooling in a reactor configuration.
Shimada, K.↗