Characteristic Wave Cataloguing for Ray Path Determination
Characteristic Wave Cataloguing for Ray Path Determination

Author: Yūji Inoue

Publisher:

Published: 1965

Total Pages: 38

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Wave cataloguing suitable for ray tracing of a pulsed wave packet in a weakly-dissipative, horizontallystratified magnetoionic medium is described, Particular attention is devoted to the cataloguing of the various characteristic waves so that the influence of the local ionization density and collision frequency can be understood. The procedure presented is applicable under general incident conditions and complex refractive index surfaces. The Booker quartic equation is used to derive the unambiguous wave normals and wave identification is obtained from the dispersion equation. A modified CMA. diagram including collisions is illustrated. (Author).

Electrophoretic Power Generation in Thermally Ionized Plasmas
Electrophoretic Power Generation in Thermally Ionized Plasmas

Author: C. C. Leiby (Jr.)

Publisher:

Published: 1965

Total Pages: 42

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Druyvesteyn's solutions for electrophoretically induced gas flows in electrical discharges in gases were extended over a larger pressure range and corrected for the influence of Debye shielding effects. The effects of molecular or 'slip' flow were also taken into account. These more accurate and general solutions were applied to the reverse phenomenon of space charge field generation arising from the flow of a thermally ionized cesium plasma through a tube. Under such flow conditions, a non-linear differential equation for the axial pressure distribution was obtained but not solved. However, it was possible to obtain estimates of the ranges of cesium pressure, temperature and tube radii which would be required for sensible levels of electric power generation. Anaphoretic flow power levels of the order of 0.1 to 10 watts, in tubes of laboratory dimensions (radii of 10 cm or less), appear feasible at temperatures from 1700 to 2400K. Sensible power generation levels at lower temperatures require very large diameter tubes, and therefore are not feasible. (Author).

A Study of Band Edge Distortion in Heavily Doped Germanium
A Study of Band Edge Distortion in Heavily Doped Germanium

Author: Freeman D. Shepherd (Jr.)

Publisher:

Published: 1965

Total Pages: 98

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Details of the energy band structure of degenerate n-type germanium were determined by analysis of fine structure in the 4.2K volt-ampere characteristic of germanium tunnel diodes. No shift in the relative energy of the conduction band minima was observed. The band edge is found to be exponentially distributed with 1/e energies of the order of 10 MeV. There appears to be an ordering mechanism among the group V impurity atoms used as substrate dopants. (Author).

Machine-aided Design of Context-free Grammars
Machine-aided Design of Context-free Grammars

Author: Thomas G. Evans

Publisher:

Published: 1965

Total Pages: 30

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The following paper represents work to date on the deformation method for quadratic programming and thus may be regarded as a sequel to Zahl, S. (1964) A Deformation Method for Quadratic Programming, Research Note AFCRL-63-132. It gives an explanation of a modified Iverson programming language and uses this to give a detailed algorithm for the Zahl Deformation Method of Quadratic Programming.

Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid
Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid

Author: Marvin S. Brooks

Publisher:

Published: 1965

Total Pages: 94

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An experimental study on the zone refining of the binary system triphenyl antimony-benzoic acid is described. The isotope Sb124, which is a strong gamma emitter, was employed as a tracer; this allowed a rapid in situ nondestructive analysis, closely spaced experimental points, and the opportunity to study distribution as a function of varying experimental conditions. With the aid of computers (IBM 7090 and IBM 7044) apparent k's were calculated and the experimental data compared with those predicted from various mathematical models. (Author).