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Development of passive electronic components for instrumentation of improved geothermal logging tools and components. Annual progress report
Short term objectives for well-logging instrumentation are circuits which can operate at temperatures in the range 275/sup 0/C to 350/sup 0/C; the medium term goal is operation up to 500/sup 0/C, and the long term goal is to achieve operation at 1000/sup 0/C. It is apparent that useful electronic circuits will require the combination of both passive components and active devices. In order to meet the compatibility requirements, the basic technology which has been selected in this project is the chemical vapor deposition of metal interconnections, resistor material, dielectric material and passivating material. It is to be emphasized that this is a thin-film, not thick-film, technology which is compatible with the processing methods used in fabricating either semiconductor or integrated thermionic devices, and produces components which are electrically compatible with those devices. The investigation in this project is primarily directed toward tungsten metallization, tungsten-silicon resistors, and silicon nitride dielectric and passivation.
Date:
October 20, 1977
Creator:
Raymond, L.S.; Hamilton, D.J. & Kerwin, W.J.
Object Type:
Report
System:
The UNT Digital Library
Remote servicing features of two new mirror fusion reactors
Several general approaches to remote servicing are briefly described for the LLL Field Reversed Mirror and Tandem Mirror Fusion reactors. Remote servicing system design considerations for the blanket module are briefly discussed. (RME)
Date:
April 20, 1977
Creator:
Neef, W.S. Jr.
Object Type:
Article
System:
The UNT Digital Library
Development of Passive Electronic Components for Instrumentation of Improved Geothermal Logging Tools and Components. Semiannual Progress Report. Report No. 1. [For Temperatures Up to 500/sup 0/C]
Research progress is reported on the development of passive components, resistors, capacitors, metallization, and passivation, that will withstand well logging temperatures to 500/sup 0/C and have extremely low temperature coefficients. The lower the temperature coefficients, the more exacting the instrumentation designs can be without elaborate compensation techniques. The method of fabricating the thin film components is that of chemical vapor deposition (CVD) which is a major deviation from the standard approach. The films are grown in a CVD reactor by passing various reactant gases over a heated substrate. The reactor was modified in order to accommodate the gases needed in the deposition of metals. The reactor can be operated over a temperature range of 400/sup 0/C to greater than 1200/sup 0/C, and at any pressure between atmospheric and 1 x 10/sup -3/ torr. Tungsten, tungsten-silicon, and silicon nitride were successfully deposited on oxidized silicon wafers. The tungsten is used for interconnects and capacitor plates, tungsten-silicon is used as a high resistivity material for resistors, and silicon nitride is used as a dielectric for the capacitors and as a passivation layer. The materials are currently being studied in terms of their deposition parameters and electrical characteristics.
Date:
April 20, 1977
Creator:
Raymond, L. S.; Hamilton, D. J. & Kerwin, W. J.
Object Type:
Report
System:
The UNT Digital Library
Materials testing using laser energy deposition
A convenient method for determining the elastic constants of materials has been devised using the energy from a Q-switched neodymium-glass laser. Stress waves are induced in materials having circular rod or rectangular bar geometries by the absorption of energy from the laser. The wave transit times through the material are recorded with a piezoelectric transducer. Both dilatation and shear wave velocities are determined in a single test using an ultrasonic technique and these velocities are used to calculate the elastic constants of the material. A comparison of the constants determined for ten common engineering materials using this method is made with constants derived using the conventional ultrasonic pulse technique and agreement is shown to be about one percent in most cases. Effects of material geometry are discussed and surface damage to the material caused by laser energy absorption is shown.
Date:
December 20, 1977
Creator:
Wilcox, W.W. & Calder, C.A.
Object Type:
Article
System:
The UNT Digital Library
Lithium--water--air battery project: progress during the months of August--November. [Development of prototype Al/air cell]
Work done on the Lithium--Water--Air Battery Research Program in the work period August through November, 1977, is summarized. A prototype single-cell fuel cell was developed. The single galvanic cell consists of two 30-cm square aluminum plates separated by a two-faced air cathode mockup. The purposes of the model are to determine ease and cost of electrode servicing and weight and manufacturing cost of the hardware. Projections of fuel cell performance and cost were made, based on the prototype cell and the performance of cells of similar anode--cathode spacing produced by Lockheed Missiles and Space Company. Performance is a strong function of the weight of water carried in the fuel cell, as water is the limiting reactant when sufficient aluminum is carried for a vehicle range of 1600 km. Research concerning the electrochemistry of calcium in aqueous chloride--hydroxide electrolytes is summarized with reference to a recent presentation of the work at the Fall Meeting of the Electrochemical Society. Polarization curves were obtained for the aluminum alloy used by Lockheed in fuel cell research. The experimental data agree closely with Lockheed's published results. 9 figures, 1 table.
Date:
December 20, 1977
Creator:
Cooper, J.F.; Hosmer, P.K.; Krikorian, O.; Kelly, E. & Parrish, W.
Object Type:
Report
System:
The UNT Digital Library
Inelastic Strong Interactions at High Energies. [Cross Sections, Field Theory]
A method permitting the calculation of inclusive and semi-inclusive cross sections at high energies starting from an arbitrary field theory was worked out. The method relies on a functional integral representation of the generating functional of inclusive cross sections and on the use of semiclassical methods. The inclusive cross section is proportional to the absolute square of the Fourier transform of a special soliton solution of the classical field equations in zeroth order semi-classical approximation. A conserved topological quantum number that has a nonzero value for the soliton solution was found. Future research to be performed in this field under the contract is described including applications to various field theories and the exploration of connections with Reggeon field theory.
Date:
October 20, 1977
Creator:
Suranyi, P.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of anion exchange resins for processing plutonium--neptunium residues
An anion exchange process was developed to process miscellaneous residues of plutonium plus 0.5 wt % neptunium to allow prompt return of the plutonium to a plutonium recovery process. Several macroreticular anion exchange resins were compared to Dowex 1-X4 for the process. Dowex 1-X4 showed the best performance for the plutonium (III)-neptunium(IV) separation.
Date:
August 20, 1977
Creator:
Navratil, J. D. & Leebl, R. G.
Object Type:
Report
System:
The UNT Digital Library
Position and profile of a multiampere proton beam
The spacial profile of a bunched or unbunched proton beam may be found by using a highly collimated molecular beam of N/sub 2/. A certain fraction of the molecular N/sub 2/ will be ionized as it crosses the proton beam. By measuring the N/sub 2//sup +/ current as a function of theta the cross section of the beam is directly obtained. As an example, a 10 A proton beam of diameter 1 mm is considered.
Date:
October 20, 1977
Creator:
Edwards, D. Jr.
Object Type:
Article
System:
The UNT Digital Library
Directions for possible upgrades of the Mirror Fusion Test Facility (MFTF)
The Mirror Fusion Test Facility (MFTF) may be upgraded by extending the time of plasma sustenance in an approach to steady-state operation and/or by increasing the neutral-beam injection energy. Some parameter bounds for these upgrades are discussed as they relate to a definition of the required neutral-beam development.
Date:
December 20, 1977
Creator:
Damm, C. C.; Coensgen, F. H.; Devoto, R. S.; Molvik, A. W.; Porter, G. D.; Shearer, J. W. et al.
Object Type:
Article
System:
The UNT Digital Library
Computor program for mathematical evaluation of the Rocky Flats nuclear accident dosimetry system
A computer program has been developed to facilitate the evaluation of the Rocky Flats Emergency Dosimetry System. This program evaluates data to determine the neutron fluence associated with a criticality accident. It is necessary to obtain information about the critical system for personnel dose estimates. Information pertaining to the geometry and position of the critical material and orientation of personnel, with respect to the material, is essential to supplement the calculations contained in this program.
Date:
December 20, 1977
Creator:
Wood, C. B.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0052.0487]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "CRUMPLED after catching the top of the Western Avenue bridge over the Northwest Expressway Monday is a five-ton forklift. Police said the machine riding atop a semi-tractor trailor, tumbled 180 feet behind the eastbound truck. Debris struck one westbound car, causing minor auto damage. Driver Eugene Wright, who was en route to his home base at Wichita, Kan., was cited for carrying a load two feet too high to clear the posted bridge height."
Date:
June 20, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0063]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Darly Coats, right, admires Rhonda Carr's entry in the Coolidge Elementary Fall Flower Show."
Date:
October 20, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0370]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Pat Burns, co-chairman and Bernest Cain, chairman of Oklahoma Common Cause, present award to Sen. Bill Dawson, right."
Date:
July 20, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0170.0518]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Tommy Leon Dye 25, of 2804 SW 36 was arraigned on the manslaughter charge before Special judge A. R. Swank Jr."
Date:
October 20, 1977
Creator:
Southerland, Paul B.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0170.0394]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 20, 1977
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0262]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Broken concrete, caving banks and weeds mark Nichols Hills channel proposed for renovation."
Date:
January 20, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0553]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Dr. C. L. Coley, new Midwest City Chamber president, wields a big responsibility as well as a big gavel in his new post."
Date:
January 20, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Clip: DW city council (detective)]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 20, 1977, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Trucks (no slate)]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 20, 1977
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Cover-gas seal program. Test report - sodium dip-seal wetting study. [at 450/sup 0/F]
This report documents the tests conducted to find a reliable surface preparation method of treating the CRBRP dip seal blade (SA508 Class 2 steel) to insure its sodium wettability at 450F or less. Two techniques were established which depressed the sodium wetting temperature of SA 508, Class 2 dip seal blade material to 375F. These techniques were depositing an approx. 60 x 10/sup -6/ inch layer of tin on the blade surface by a brush-on plating process, and, by cleaning the blade surface with ultrasonics while it is immersed in sodium. The tin plating technique is recommended as the initial and primary surface preparation method and ultrasonics as a rewetting and backup technique. This work was conducted in support of the Sodium Dip Seal Feature Test, DRS 32.05.
Date:
October 20, 1977
Creator:
Carnevali, R.
Object Type:
Report
System:
The UNT Digital Library
Formation processes and secondary emission coefficients for H/sup -/ production on alkali-coated surfaces
The formation of negative ions by hydrogen collisions on cesium-coated surfaces is discussed in the limiting cases where the resident cesium is either in the purely ionic state or in the purely atomic state. The survival fraction for negative ions moving away from a metal surface is calculated using a method employing complex eigenvalues. The fraction of surviving ions is found to be larger than calculated by previous workers. The secondary emission coefficient for negative ion production by incident atoms with energies of ten to one hundred electron volts is estimated to be in the range thirty to fifty percent. The secondary emission coefficient is found to be a sensitive function of the thickness of the alkali adsorbate coating for ion energies in the range below a few hundred electron volts.
Date:
September 20, 1977
Creator:
Hiskes, J.R. & Karo, A.
Object Type:
Article
System:
The UNT Digital Library
Desalting sea water and brackish waters: a cost update
This report, based on first-quarter 1977 dollars, is an update of costs presented in ORNL/TM-5070 (Rev.), which gave cost estimates for desalting seawater and brackish waters based on first-quarter 1975 financial parameters. Cost estimates are given for desalting seawater by distillation and reverse osmosis and for brackish waters using reverse osmosis and electrodialysis. Cost data were computed as a function of plant size and energy cost. The cost of generating steam and electrical energy on-site using coal-fired boilers as well as oil-fired boilers and dual-purpose electric/seawater distillation plants is included. While the costs of energy, equipment and labor have continued to rise, they have increased at a relatively modest rate compared with the two years prior to 1975. On an average, the cost of desalting seawater by distillation has increased approximately 15%. Costs for desalting brackish waters by the membrance processes have increased about 7%.
Date:
October 20, 1977
Creator:
Reed, S. A. & Wilson, J. V.
Object Type:
Report
System:
The UNT Digital Library
Elimination of image blurring due to double scatter events in. gamma. imaging MWPC detectors
In multiwire proportional chambers used with honeycomb lead converters for detecting 511 KeV ..gamma.. rays from positron annihilation, a source of image blurring is generated by multiple interaction events due to the escape photoelectric x-ray or from the Compton scattered photon. Using the delay line readout method the majority of these double events are eliminated by using the fact that the sum of the time intervals from the prompt anode signal to the signal arrival at each end of the delay line is a constant to within the timing accuracy for a single interaction. Double interaction events produce a time sum which is shorter. Good improvement in image quality is obtained. The observed number of multiple events is larger than calculations would predict.
Date:
October 20, 1977
Creator:
Ortendahl, D.; Tam, K.C.; Perez-Mendez, V. & Lim, C.B.
Object Type:
Article
System:
The UNT Digital Library
Long-life cathode for the Berkeley-type ion source
Preliminary experiments indicate that a hollow cathode, made from impregnated tungsten emitters, can be adapted for the Lawrence Berkeley Laboratory (LBL)/Lawrence Livermore Laboratory (LLL) ion source. Such cathodes could be the basis of a long life, continuously operated positive-ion source.
Date:
October 20, 1977
Creator:
Fink, J.H. & Biagi, L.A.
Object Type:
Article
System:
The UNT Digital Library