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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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Scanning array was designed with properties of low RF loss and phase control. The array consists of a series of special waveguides, hybrids made up of two variable reactance branch arms for input signals, an edge slot for the difference port, and a sum arm for the unradiated signal.
Design and performance of curved photomultiplier tube - effects of structural configuration on dead time and gain stability
Optimum design parameter calculations for curved photomultiplier tube
Fabrication of aluminum oxide thin film window for capillary type photomultiplier tubes
Single-electron capture by carbon ions from helium, neon, and argon at energies below 40 keV
Characteristic plane harmonic free internal neutral atmospheric wave oblique propagation through horizontally stratified quiet atmosphere for various thermospheric parameters
Thermal diffusion coefficient for fully ionized plasma containing mixture of arbitrary charge ions in topside ionosphere
Counting efficiency, noise factor measurement, dark noise, gain and counting rate, optical enhancement
Heavy positive ions pulse counting by spiral-type continuous channel electron multipier, noting long pulse rise time composed of numerous after pulsing
Solid state broadband stable power amplifier
Measuring elevated-temperature time-dependent corrosion effects of liquid metal on immersed structural materials
Measurement of elevated temperature, time dependent corrosion effects of liquid metals on immersed structural materials by blocked two-level factorial experiment
Performance and response characteristics of smoothing, image intensifier dissector for low light level astronomy and optical detection
The A approaches X, B approaches X and B approaches A bands of CO(+) have been excited using monochromatic photons and the band intensities measured. Using such data the variations of the electronic transition moments for these above emission bands as well as for the absorption bands have been determined. Further, the specific cross sections for the absorption processes have been determined by measuring the total emission intensity in the band system through which the upper state decays. The band intensity measurements and the derived results are presented.
The initial results of absolute proton efficiency measurements made in an auroral particle study by sounding rockets are given. The measurements were made at several counting rates from 1000 to 40,000 counts/sec on rocket-borne equipment. The results agree with those of Egidi et al. (1969) in the high energy range and show a disagreement at low energies.
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It is shown that the accuracy of calculations can be improved if appropriate (different) values of alpha are used for each configuration. Alternatively, the Slater Transition state can be used, wherein a total energy difference is related to a difference in single electron eigenvalues. By a series expansion, the value of alpha for an excited configuration can be related to its value for the ground state configuration. The terms Delta alpha (delta Epsilon/delta alpha) exhibit a similar dependence on atomic number as the ground state values of alpha. Results of sample calculations are reported and compared with experiment.