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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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Two ferroelectric bolometer sensing elements measure low rf absolute power at millimeter and submillimeter wavelengths. The sensing elements are mounted in sections of waveguide and connected in series in a standard temperature compensating bridge circuit.
Single or double ion chamber technique measures absolute radiation intensities in the extreme vacuum ultraviolet region of the spectrum. The ion chambers use rare gases as the ion carrier. Photon absorbed by the gas creates one ion pair so a measure of these is a measure of the number of incident photons.
Pathology examination of tissues of dogs rapidly decompressed to less than two millimeters of mercury absolute
Neutron star properties and structure at absolute zero temperature
Vacuum ultraviolet coatings, microcircuitry welding, metal polishing, absolute spectral response system, parabolic reflectors, and soldering to electrodeposited metals
Thermopiles for absolute radiometry in far ultraviolet
Absolute measurements of K X-ray quantum yields resulting from deuteron bombardment of thick targets containing carbon and boron
Design and testing of absolute-type pressure switch
Total reflection technique to achieve effective high absolute photocathode sensitivity
Properties of neutron star at absolute zero temperature, discussing ground state, particle models and energy spectrum
Cavity type radiometer for absolute total intensity measurement of visible and IR radiation
Absolute magnitude of magnetic star HR 1732
Hypoxemia induced in man by sustained forward acceleration while breathing pure oxygen in five pounds per square inch absolute environment
Integrating sphere reflectometer for measuring absolute hemispherical spectral reflectance of surfaces
Optical resolution and absolute configuration of trans-beta-phenylglycidic acid
Cell model of attractive interactions between helium atoms and effect on solid-superfluid transition in He 4 at absolute zero
Long-term absolute frequency stabilization of a laser oscillator is obtained when the lasers oscillation frequency is referenced to the exact center of an atomic transition. A laser amplifier acts as a discriminant to indicate when the laser frequency deviates from the center of its atomic transistion.
Conical cavity-type absolute radiometer measures the intensity of radiant energy to an accuracy of one to two percent in a vacuum of ten to the minus fifth torr or lower. There is a uniform response over the ultraviolet, visible, and infrared range, and it requires no calibration or comparison with a radiation standard.