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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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TIC-TOC-TOE computer program for radiation shielding design and analysis in nuclear rocket systems
Photodisintegration of iron into helium and neutrino annihilation process cause hydrostatic and dynamic instabilities that produce star collapse
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Discriminator in nuclear particle detection system distinguishes nuclear particle type and energy among many different nuclear particles. Discriminator incorporates passive, linear circuit elements so that it will operate over a wide dynamic range.
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Analysis of capture, inelastic, and activation gamma ray spectra for basalt and granite
Sputtering electrode system design for regeneration of targets within accelerator
Etching techniques for undoped and lithium doped silicon solar cells and observation by surface replication and thin film transmission electron microscopy
Power level variations in cavity reactor produced by density changes in gaseous nuclear fuels
Physical models for measuring acoustic instabilities of high temperature gaseous uranium for use in gaseous core nuclear rocket system
Apollo 11 and 12 lunar rock and soil examination, emphasizing Au and Ag excess in soil
Methods for increasing the (optical density span) of radiographs were evaluated. In one method, fluorescent dye was deposited in the tracks of the radiograph. The radiograph was then examined under ultraviolet light. The second method was a crossed Polaroid filter technique. The radiograph was placed between the filters and then illuminated with a diffuse white-light source. An increase in the optical density span from .10 to .37 was obtained with the dye method. With the Polaroid method, the increase obtained was from .10 to 2.4.
A procedure was developed to calculate the critical fuel mass, including the effects of propellant pressure, for coaxial-flow gas-core reactors operating at 196,600 newtons thrust and 4400 seconds specific impulse. Data were generated for a range of cavity diameter, reflector-moderator thickness, and quantity of structural material. Also presented are such core characteristics as upper limits on cavity pressure, spectral hardening in very-high-temperature hydrogen, and reactivity coefficients.
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