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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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Integrating spacecraft/experiment payloads for solar-thermionic flight test vehicle
Collection of science experiments selected for solar thermionic flight test vehicle
Comparative analysis of solar-thermionic and photovoltaic power systems for solar and planetary probes
Thermionic energy converter converts nuclear generated heat directly into high frequency and direct current output. It consists of a potassium plasma cell, a tantalum emitter, and a silver plated copper collector. This conversion process eliminates the steam interface usually required between the atomic heat source and the electrical conversion system.
Thermionic converter switch permits chopping in the immediate vicinity of a low-voltage, high current power source, eliminating line losses due to temperature limitations of semiconductor devices.
The Group VIA-Re binary systems are characterized by the presence of several intermediate phases. The u phase is present in all of the systems, but the a-Mn phases occur in only the Mo-Re and W-Re systems. The occurrence of these intermediate phases appears to be governed largely by electronic factors and is predictable on the basis of electron/atom ratio. The thermionic work functions of the intermediate phase materials were experimentally determined. function and the screening of the outermost electrons in the Group VIA metals was found. A correlation between the work As might be expected for purely metallic substances, the work functions were relatively high, in the range 4. 5 to 5. 0 eV, and in each case were bracketed by the work functions of the pure constituents. A discontinuous change in the average work function with composition is proposed, based on a thermodynamical treatment of the electron vapor.
Thermionic emission microscope was designed to operate with metal specimen cathode temperatures of 2000 degrees C.
Reactor heat pipe flow system with external diode for thermionic generator power supply
Current-voltage characteristics of xenon filled nuclear irradiated thermionic diodes
Computer programs for analyzing performance data on thermionic isotope space power system
Electrical properties of xenon filled thermionic diodes in nuclear reactor radiation field
Six converter solar thermionic generator
Testing, fabrication, configuration selection, and electrical performance calculations in solar thermionic generator development
Current carrying capabilities of thermionic cathodes in nitrogen at pressure levels above one atmosphere
Radiation effects on thermionic insulator materials - evaluation of beryllia, alumina, thoria, zirconia, and yttria
High temperature, and radiation field effects on physical properties of ceramic insulators for nuclear thermionic systems
Heat pipe thermionic converter
Performance and life test on thermionic converters and generators