Electron beam electric field meter.
Electric field meter for ionosphere, using electron beam deflection technique
Bendor, E., Sr.↗
SEARCH · Engineering Papers
Results for “beam techniques”
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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Mean life of the 2p super 2 super 1 D level in C III.
C III 2p super 2 presuper 1 D level mean life measurement using beam-foil technique, noting corresponding Einstein A coefficient
Bashkin, S.↗
Mean lives of some doubly excited levels in lithium. I.
Excited levels in Li I produced by Li 7 ion passage through carbon foil, measuring excitation mean lives by beam foil technique
Artinson, I.↗
Mean lives of the ip super 2 super 1 D level in F VI and O V.
Mean lives of 1s super 2 2p super 2 super 1D level in F VI and O V measured by beam foil technique
Bashkin, S.↗
Star Field Reader Final Report, 4 Jan. 1965 - 30 Jul. 1968
Engineering model star field reader using solid state light beam scanning technique
Source record↗
Mean lives of the 2p 1P, 3p 1P, 4p 1P, and 5p 1P levels in He I
Mean lives measurement for excited levels in singlet system of neutral He using beam foil technique
Bickel, W. S.↗
A survey of laser display
Laser display systems, discussing mechanical, diffractive and refractive beam deflection techniques, electro-optical polarization devices, holographic displays, etc
Devaney, A. J.↗
Picosecond pulse measurement employing the nonlinear photoelectric effect
Picosecond light pulse measurement by two beam overlap technique using nonlinear photoelectric effect
Burnham, D. C.↗
Beam-foil spectra of boron 450-5000 A
Electronic transitions in B by beam foil technique for spectral lines in 450-5000 A range, measuring excited levels mean lives
Bickel, W. S.↗
Feasibility study to determine methods of measuring the temperature of a molecular beam Final report
Molecular beam sampling technique for temperature measurement of earth thermosphere
Fowler, P.↗
Spin test of turbine rotor
Experimental data are presented for the tangential and radial stresses in the disks of the 36,000 horsepower, 4000 rpm turbine for the M-1 engine oxidizer turbopump. The two-stage Curtis turbine is a special light-weight design utilizing thin conical disks with hollow sheet metal blades attached by electron-beam welding techniques. The turbine was fabricated from Inconel 718, a nickel-chromium alloy. The stresses were obtained by strain-gage measurements using a slip-ring assembly to transmit the electrical signals. Measurements were made at different rotative speeds and different thermal loads. In addition to presenting test data, the report describes test equipment, design of associated hardware, test procedures, instrumentation, and tests for the selection and calibration of strain gages.
Vavra, M. H.↗
Energy levels and mean lives of Cl II to Cl VII.
Investigation of the spectra of chlorine between 500 and 2800 A using the beam-foil technique. Over 200 multiplets have been observed, many of which had not been reported earlier. A number of such transitions could be classified, and several new term values are proposed for Cl IV, Cl V, Cl VI , and Cl VII. Mean lives of various excited levels were measured for Cl II to Cl VII. The results are compared with theoretical calculations and other measurements in appropriate isoelectronic systems.
Bashkin, S.↗
Annealing effects in plated-wire memory elements. I - Interdiffusion of copper and Permalloy.
Results of investigations using X-ray diffraction and electron-beam microprobe techniques have shown that copper and Permalloy platings interdiffuse at low temperatures when plated-wire memory elements are annealed for times as short as 50 hr. Measurable interdiffusion between Permalloy platings and gold substrates does not occur in similar conditions. Both magnetic and compositional changes during aging are found to occur by a thermally activated process with activation energies around 38 kcal/mol. It is shown, however, that copper-diffusion and magnetic-dispersion changes during aging are merely concurrent processes, neither being the other's cause.
Knudson, C. I.↗
Effect of a magnetic field on the diffusion of an electron-hole plasma in germanium.
Study in germanium of an optically injected electron-hole plasma, parallel and perpendicular to an applied magnetic field. The density gradient within the crystal was measured directly by an infrared-beam-absorption technique. Diffusion measurements made parallel to the magnetic field are adequately explained by the theory.
Gurnee, M. N.↗
Fe I oscillator strengths determined from anomalous dispersion of shock-heated gases.
Determination of Fe I oscillator strengths by the hook method on shock-heated gases. Within the given errors these values agree with oscillator strengths obtained by other methods, including wall-stabilized arc and shock-tube emission, the beam-foil technique, and delayed-coincidence measurements, except that the data reported in the present article tend to be somewhat higher. If it is assumed that no change occurs in atmospheric models, the authors' f-value scale would suggest a solar abundance at the lower limit of the recently published values - namely, log (A sub Fe/A sub H) + 12 = 7.4. This study demonstrates the effectiveness of the hook method for quantitative spectroscopy on shock-heated gases and points up its usefulness for gas diagnostics on optically thick lines.
Huber, M. C. E.↗
Phased array antennas for applications on spacecraft.
This is a survey paper wherein phased array antenna systems, now operating on spacecraft, are reviewed so as to reveal their basic techniques of beam formation, steering, and receive/transmit (transponder) functions. Laboratory developmental antennas, designed for ultimate spacecraft flight qualification, are assessed in terms of the needs of communications, earth resources instrumentation, and area surveillance.
Kummer, W. H.↗
Effect of electron beam pulse width on time-of-flight spectra
A simple but useful formula describing the effect of electron gun pulse width on the time of flight (TOF) spectra measured in translational spectroscopy experiments is developed. An approximately monoenergetic pulsed electrostatically focused electron beam traverses a scattering cell filled with a Maxwellian gas. Inelastic electron collisions with the gas produce metastable particles, ions, scattered electrons, and photons which then pass through a collimating slit system at right angles to the electron beam. TOF techniques are used to separate the photon signal from the metastable particle signal and to measure the TOF distribution of the metastable species.
Misakian, M.↗
Recent developments in density, temperature and momentum fluctuation measurement
Attention is drawn to recent advancements in the fluctuating line-reversal temperature measurement, the development of the two-dimensional drag-sensing probe into a three-dimensional drag-sensing probe, and the fluctuating density gradient cross beam Schlieren technique. An experimental apparatus is explained whereby the temperature fluctuation in a pulsating air-fuel ratio Bunsen burner is measured by means of sodium D-line reversal methods with a new photoelectric circuit to obtain both fluctuating and mean temperature data. The three-D drag probe is made possible by a newly invented differential and total magnetic sensing system that separates signals due to three orthogonal movements so that the vectorial momentum fluctuation can be measured. In the case of the Schlieren technique, the effect of anisotropic density gradients with respect to the angle between the polarization plane and the knife edge of a laser Schlieren system is studied.
Battle, T. M.↗