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86
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43
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23
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12
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9
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9
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8
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245
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182
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99
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95
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76
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32
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23
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16
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Low cost solar collector of a packed bed design
Two solar collectors using a pebble bed design were constructed and tested using air as the heat exchange media. One collector had pebbles of metallurgical grade coke, and the other had a frothy volcanic material called scoria. The highly irregular surface of such vesicular material should increase the path distance for the air and the surface exposed cavities should give some honeycomb effect. Both should yield greater efficiency. Actual testing shows the efficiencies to be comparable with other air collectors. Thus the advantages of the pebble bed lie in the availability of the bed material, its thermal and radiation stability, and its shielding of underlying collector materials from ultraviolet radiation. Several pebble bed collectors using water as the heat exchange media were constructed. However, basic problems prevented effective testing, and it is concluded that pebble bed collectors using water are impractical.
Date:
July 29, 1977
Creator:
Simpson, D.R.
Object Type:
Report
System:
The UNT Digital Library
High energy negative deuterium beams using double charge-exchange or surface production
Experimental and theoretical research on production of negative ion beams is described. Results from a double charge-exchange experiment include 10 ms pulses of 100 ma of D/sup -/ accelerated to 60 kV. Equilibrium fractions of D/sup -/ in several metal vapors are presented. Mechanisms and measurements of D/sup -/ on surfaces are described, and a scheme is shown for producing high current, high energy beams originating on surfaces.
Date:
November 29, 1977
Creator:
Hooper, E. B. Jr.; Anderson, O. A.; Orzechowski, T. & Poulsen, P.
Object Type:
Article
System:
The UNT Digital Library
Coil winder for the magnet of the mirror fusion test facility
A coil winder was designed for the purpose of fabricating the superconducting magnets of the Mirror Fusion Test Facility. The superconducting magnets are a displaced ying-yang pair, each having major and minor radii of 2.5 and 0.75 m, respectively, and cross section of 0.42 m by about 1.03 m. The superconductor cross section is a square, 13 mm on a side, and consists of a core of niobium-titanium embedded copper and a solid copper stabilizer. Conceptual studies made at Lawrence Livermore Laboratory of the coil winder resulted in concept drawings and a procurement specification. Final design was made by the contractor, and the coil winder is now in fabrication. This paper describes the performance requirements of the winder, and the evolution of its design from conceptual stage to completion.
Date:
August 29, 1977
Creator:
Ling, R.C.
Object Type:
Article
System:
The UNT Digital Library
LOFT shield tank steady state temperatures with addition of gamma and neutron shielding
The effect of introducing a neutron and gamma shield into the annulus between the reactor vessel and the shield tank is analyzed. This addition has been proposed in order to intercept neutron streaming up the annulus during nuclear operations. Its installation will require removal of approximately 20-/sup 1///sub 2/ inches of stainless steel foil insulation at the top of the annulus. The resulting conduction path is believed to result in increased water temperatures within the shield tank, possibly beyond the 150/sup 0/F limit, and/or cooling of the reactor vessel nozzles such that adverse thermal stresses would be generated. A two dimensional thermal analysis using the finite element code COUPLE/MOD2 was done for the shield tank system illustrated in the figure (1). The reactor was assumed to be at full power, 55 MW (th), with a loop flow rate of 2.15 x 10/sup 6/ lbm/hr (268.4 kg/s) at 2250 psi (15.51 MPa). Calculations indicate a steady state shield tank water temperature of 140/sup 0/F (60/sup 0/C). This is below the 150/sup 0/F (65.56/sup 0/C) limit. Also, no significant changes in thermal gradients within the nozzle or reactor vessel wall are generated. A spacer between the gamma shield and the shield tank …
Date:
September 29, 1977
Creator:
Kyllingstad, G.
Object Type:
Report
System:
The UNT Digital Library
Samanid ceramics and neutron activation analysis
Glazed pottery known as ''Afrasiyab'' and ''Nishapur'' wares (early Islamic ceramics) are generally attributed to the Samanid dynasty (819-1005). The clay composition of Samanid wares and discarded kiln items found in situ were analyzed by NAA and the elemental composition compared with that of other sherds. 7 figures, 1 table. (DLC)
Date:
August 29, 1977
Creator:
Azarpay, G.; Frierman, J.D. & Asaro, F.
Object Type:
Article
System:
The UNT Digital Library
Compact 80-keV neutral-beam module
A compact and maintainable source of 80-keV neutral beams that focus to a high power density is required for the Mirror Fusion Test Facility (MFTF). In the new source being designed and built to meet these requirements, the cross-sectional area is reduced in two ways: by immersing the source in a vacuum where high voltage can be held over smaller distances and by redesigning grid supporting structures. Reliability is increased by reducing the electric fields everywhere else below those present between grids and by design innovations. The latter include techniques to reduce stray magnetic field and disperse gas uniformly, all metal-ceramic construction, and a 60-kV shield enclosing all 80-kV electrodes. Wherever possible, we have attempted to simplify the construction. We expect to solve problems that arise during testing either with add-on fixes or with the techniques already tested successfully on the Lawrence Berkeley Laboratory (LBL) 120-keV source. Easy maintenance is obtained by a compact isolation valve and by modular construction. Curving both the grid wires and their holders provides focusing in two planes.
Date:
September 29, 1977
Creator:
Molvik, A. W.; Baird, E. D.; Berkner, K. H.; Cooper, W. S.; Duffy, T. J.; Ehlers, K. W. et al.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0224.0485]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Pro-life attorney Bill Choate appeared at the anti-abortion exhibit at State Fair of Oklahoma Today as fair officials again refused to return materials to Oklahomans for Life."
Date:
September 29, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0051.1058]
Photograph taken for a story in the Oklahoma City Times newspaper. Caption: "Ward B. Auxier, 57, of 4048 NW 61, escaped injury about 8:30 a.m. today when his 1975 Chrysler stalled on railroad tracks near SW 7 and Western and was struck by a 97-car Rock Island train."
Date:
July 29, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0408.0078]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma State Fair 1977"
Date:
September 29, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Coaches' Film: North Texas State University vs. Florida State , 1977]
Partial footage of the 1977 football game between North Texas State University and Florida State University in Tallahassee, Florida, shot for coaching purposes. The game was held on September 10th, 1977 and the final score was 14-35, Florida.
Date:
October 29, 1977
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[Photograph 2012.201.B0070.0364]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "This wasn't one of the seven runs Southern Illinois scored Sunday in beating Oklahoma, 7-3."
Date:
May 29, 1977
Creator:
Engh, Eric
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0117.0329]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The Eat More Art Artists close their show Sunday at the Overholser Mansion Carriage House, 405 NW 15."
Date:
November 29, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0426]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Shirley Darrell Exec. Dir. YWCA OKC"
Date:
April 29, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0111]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "When a human being is ill, there is only one logical source for aid- a physician."
Date:
December 29, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0757]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Police parking enforces Karen Clark, left, and Ken Buettner prepare to start the day's rounds in one of the Oklahoma City department's new three-wheeled cycles."
Date:
December 29, 1977
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0268]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
April 29, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0166.0264]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
August 29, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0287]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Work on this flood control project on Deep Fork Creek at the 3000 block of N Roff is part of the city's unprecedented spending for city construction projects."
Date:
June 29, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0353.0334]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Angler John Michael whiles a way a few peaceful hours casting his fishing line over the edge of a Lake Hefner boat dock and waiting for a good nibble on a recent brick and misty afternoon in northwest Oklahoma City."
Date:
December 29, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Clip: Clocks]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 29, 1977, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Harambee (Celebration)]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 29, 1977, 5:30 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
4. pi. interferometric measurements of laser fusion targets
Apparatus is described for rapidly manipulating a hollow glass microsphere laser fusion target and scanning the entire wall with a double pass interference microscope.
Date:
September 29, 1977
Creator:
Weinstein, B.W.; Willenborg, D.L.; Weir, J.T. & Hendricks, C.D.
Object Type:
Article
System:
The UNT Digital Library
Regulated 15-V, 7500-A, neutral-beam filament supply
Lawrence Livermore Laboratory (LLL) designed a cost-effective, regulated 15-V, 7500-A filament supply for use with the High-Voltage Test Stand , a major ERDA developmental neutral-beam test facility. The filament supply can float to 200 kV and can provide pulse widths up to 30 s. Powered by a 24-V, 0.5-TJ battery bank, it avoids the use of expensive isolation transformers and induction voltage regulators (IVR's). Battery output is regulated by a water-cooled resistor-contactor combination in which contactors are closed in sequential format to create a staircase current waveform. A fine-tuning network tunes in-between the ''steps'' for regulation to less than 0.5 percent. The regulator is digitally controlled except for the sense amplifiers, which are optically coupled to the digital controller. All ground telemetry uses optical links to minimize effects of rfi and emi noise in the data channels.
Date:
September 29, 1977
Creator:
Reass, W.
Object Type:
Article
System:
The UNT Digital Library
Use of gamma ray strength functions for predicting the neutron capture cross section of /sup 88/Y
The present study indicates that the estimation of the gamma-ray strength function is the approach least subject to error when unmeasured capture cross sections are to be computed. An estimate is given for the /sup 88/..gamma..(n,..gamma..) cross section.
Date:
July 29, 1977
Creator:
Gardner, D. G. & Gardner, M. A.
Object Type:
Report
System:
The UNT Digital Library