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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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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.
Computer program contains an input library of nuclear data for 44 elements and their isotopes to determine the induced radioactivity for gamma emitters. Minimum input requires the irradiation history of the element, a four-energy-group neutron flux, specification of an alloy composition by elements, and selection of the output.
Active device models for linear circuit application and their application to design of operational amplifier and emitter-peaked voltage amplifier stage
Solar absorptance and emittance of candidate zinc oxides/silicone and zinc oxide/potassium silicate coatings measured at room temperature for application to space radiators
Computer analysis of thermal characteristics of liquid hydrogen storage vessel on moon - thermal conductivity of insulation, solar absorptance and emittance ratio, and vessel characteristics
Emittance and thermal cycling tests of stainless steel tubes coated with iron and calcium titanate, and niobium-zirconium tubes coated with iron titanate
Emittance testing of calcium titanate and iron titanate coated stainless steel tubes and thermal cycling tests of iron titanate coated niobium-zirconium tubes
Emitter fabrication and testing, engine testing and performance, and accelerator material studies in development of cesium contact ion engine
Thermal emittance and reflectance of diffuse- bottomed specular-walled groove in solar radiant- flux environment
Spacecraft thermal control surface damage by solar wind bombardment in hydrogen and helium plasmas, with measurements of solar spectral reflectance and thermal emittance
SNAP-10A high emittance white coating, noting stability at 600 degrees F, irradiation and vacuum and mechanical vibration
Thermionic converter life-test results and failure mechanisms noting braze failure, collector deposit, emitter warpage and separation and cesium reservoir leak
Oxygen IV transition multiplet relative intensities for measuring decay rates, using triply ionized emitters
Thermal properties and environmental stability of barrier layer anodized aluminum surfaces in space, noting emittance and absorption values
Barium adsorption on individual crystal planes of tungsten field emitter studied for thermally equilibrated and unequilibrated adsorbate layers
DC potential solutions for low pressure Cs diode with zero slope at emitter noting stability, oscillations and instability for ion/electron ratios
Emittance and specific heat determination by transient thermal vacuum technique using coatings as function of temperature
Thermionic energy converter operation showing anomalous electron and ion currents in plasma mode, discussing heating power and emitter temperature