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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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Differential energy spectra of low energy protons and positive ions in earth inner radiation zone, using electrostatic analyzers aboard OGO-3 satellite
Retarded long range interaction energies between two like atoms in different energy states, noting selection rules for resonant interactions
Initial kinetic energy dependence of reaction energy distribution between direct ion-molecule reaction products internal and translational modes from crossed beam experiments
Low energy incident electron intensity and energy spectrum diurnal variations, measuring cut-off values
Rotational energy conversion of neutron star into relativistic electrons energy suggested by increasing period of pulsating radio source in Crab Nebula
Cosmic ray origin in high energy H and He isotropic abundances and energy spectra observed by IMP 4 satellite during solar quiet times
Very high energy cosmic rays disintegration and energy degradation by intense blue shifted photon fields of supernovae quasars and pulsar models
Asymptotic expansions and energy methods applied to three dimensional aircraft maneuvers involving energy climbs and turns
Energy dependence and threshold behavior of ion Ar lines excited in low-energy He ion-Ar collisions
High energy albedo neutrons energy and angular distributions, determining solar neutron flux upper limit
Dissociative electron attachment excess energy correlation with fragment ion translational energies, determining radical affinity
Asymptotic expression for low energy photoelectron energy loss to ambient thermal electrons
Solar wind velocity increase by magnetic field energy conversion to kinetic energy, constructing steady state MHD one fluid model
The applications are discussed of solar energy for thermal energy for buildings; chemical and biological conversion of organic materials to liquid, solid, and gaseous fuels; and the generation of electricity. It is concluded that if solar development programs are successful, building heating for public use is possible within 5 years, building cooling in 6 to 10 years, synthetic fuels from organic materials in 5 to 8 years, and electricity production in 10 to 15 years.
Some of the fundamental concepts of sharp crack fracture criteria are applied to cracks and narrow ellipses. The strain energy density theory is extended to notch boundaries, where the energy in a surface layer is calculated and the location of failure initiation is determined. The concept of a core region near the notch tip, and its consequences, are examined in detail. The example treated is that of an elliptical cavity loaded uniformly at a large distance from the hole, and at an angle to the hole; the results are shown to approach that of the crack solution for narrow ellipses, and to display quite satisfactory agreement with recently published experimental data under both tensile and compressive loading conditions. Results also indicate that in globally unstable configurations in brittle materials, the original loading and notch geometry are sufficient to predict the subsequent crack trajectory with considerable accuracy.
New experimental data on the energy spectrum of galactic electrons up to the energies approximately 2 x 10 to the 11th power eV were obtained in the summer of 1967 by a scintillation telescope lifted to the stratosphere at 32 km. The geometrical factor of the telescope was 1200 sq cm steradians, i.e., three times as great as the geometrical factor of previously employed installations. The results confirm previous measurements.
Techniques for the gas phase absorption of laser radiation for conversion to gas kinetic energy are discussed. Absorption by inverse Bremsstrahlung, in which laser energy is converted at a gas kinetic rate in a spectrally continuous process, is briefly described, and absorption by molecular vibrational rotation bands is discussed at length. High pressure absorption is proposed as a means of minimizing gas bleaching and dissociation, the major disadvantages of the molecular absorption process. A band model is presented for predicting the molecular absorption spectra in the high pressure absorption region and is applied to the CO molecule. Use of a rare gas seeded with Fe(CO)5 for converting vibrational modes to translation modes is described.
The basic relation is described between conversion of thermal energy into convective fluid motion and convective transport of thermal energy, and the equilibrium configuration of a sunspot's magnetic field is shown to be unstable to the hydromagnetic exchange instability. It is determined that heat transport necessarily accompanies convective driving of fluid motion and that the formation of cool sunspots requires convection extending coherently over several scale heights, a distance of at least 500 km. Several theoretical possibilities for sunspot stabilization are reviewed, and it is suggested that a suitable redistribution of cooling in the umbra may be the stabilization mechanism. It is believed that if cooling extends to a great depth in an elongated portion of a sunspot, the magnetic pressure on the boundary will be reduced, tending to reduce the elongation.