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Dip coating process. Silicon sheet growth development for the large-area silicon sheet task of the Low Cost Silicon Solar Array Project. Quarterly report No. 5, December 18, 1976--March 21, 1977

Description: Ceramic substrates can be coated with a thin layer of large-grain polycrystalline silicon by a dip-coating process. The silicon-on-ceramic (SOC) material appears to be quite promising as a low-cost cell material but requires somewhat special fabrication procedure since the contacts to both the n- and p-layers are now made on the front surface. Solar cells have been made on SOC material and on single-crystal control samples. Photodiodes 0.01 to 0.1 cm/sup 2/ made on substrates coated with vitreous carbon prior to dip coating with silicon showed the best efficiency of SOC material to date, namely over 6 percent uncorrected and about 12 percent inherent efficiency. Etching procedures have indicated that the dislocation density varies from almost 10/sup 7/ cm/sup -2/ to almost dislocation-free material, assuming that all etch pits are due to dislocations. EBIC measurements procedures were also improved, and it was found that diodes appear to be fairly uniform in EBIC response. A new SOC coating facility is being designed which will coat larger substrates in a continuous manner. The purpose is to minimize the contamination problem by reducing the contact area of the substrate with molten silicon. By having much larger throughput, it will also demonstrate the scale-up potential of the silicon-on-ceramic process. Portions of the new facility are under construction. An attempt has been made to model the economics of a large-scale facility for coating ceramic panels with silicon. A first iteration based on available parameters estimates showed that major cost items were poly Si ($2.90 per square meter), labor and burden ($2.50 per square meter), and the ceramic substrate ($2.50 per square meter), for a total price of about $11 per square meter.
Date: March 31, 1977
Creator: Zook, J. D.; Heaps, J. D.; Maciolek, R. B.; Koepke, B.; Butter, C. D. & Schuldt, S. B.
Partner: UNT Libraries Government Documents Department

[Doug Vair outdoors, 1]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 2]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 3]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is smiling with braces on his teeth. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 4]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned with arms around his knee and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 5]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned with arms around his knee and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 6]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 7]

Description: Photograph of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is smiling with braces on his teeth. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 8]

Description: Photograph of a close-up view of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is smiling with braces on his teeth. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[Doug Vair outdoors, 9]

Description: Photograph of a close-up view of Doug Vair with a mustache outdoors. He is posing in front of a blurry background. He is slightly turned and looking into the camera. He is wearing a light blue button-up shirt. His hair is parted on the side.
Date: March 31, 1977
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

DT fusion neutron irradiation of LLL 316 stainless steel and SLL silica samples

Description: The DT fusion neutron irradiation of six LLL 316 stainless steel samples and 24 SLL pure silica samples is described. The sample position, beam-on time, and neutron dose record are given. The maximum neutron fluence on any sample was 1.52 x 10/sup 17/ neutrons/cm/sup 2/.
Date: March 31, 1977
Creator: MacLean, S. C.
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. A summary of the Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the tailings on the site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The sparse population and relatively low radiation levels yield minimal immediate environmental impact; hence, the two alternative actions presented are directed towards restricting access to the site (Options I and II), and returning the windblown tailings to the pile and stabilizing the pile with 2 ft of cover material (Option II). Both options include remedial action costs for offsite locations where tailings have been placed. Cost estimates for the two options are $585,000 and $1,165,000. Reprocessing the tailings for uranium is not economically feasible.
Date: March 31, 1977
Partner: UNT Libraries Government Documents Department
open access

Engineering assessment of inactive uranium mill tailings, Shiprock site, Shiprock, New Mexico. Phase II, Title I

Description: Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Shiprock, New Mexico. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the 1.7 million tons of tailings at the Shiprock site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The 11 alternative actions presented range from completion of the present ongoing EPA site decontamination plan (Option I), to stabilizing in-place with varying depths of cover material (Options II-IV), to removal to an isolated long-term disposal site (Options V-XI). All options include remedial action costs for off-site locations where tailings have been placed. Costs estimates for the 11 options range from $540,000 to $12,500,000. Reprocessing the tailings for uranium is not economically feasible.
Date: March 31, 1977
Partner: UNT Libraries Government Documents Department
open access

Fiscal year 1976 DT fusion neutron irradiations and dosimetry at the LLL rotating target neutron source

Description: The DT fusion neutron irradiation of 319 samples during 19 irradiation periods (beam-on time of more than 1026 hours) is described. Experiments from 24 individuals representing 11 institutions are summarized. The numbers of the UCID dosimetry reports detailing each of the irradiations are given.
Date: March 31, 1977
Creator: MacLean, S. C.
Partner: UNT Libraries Government Documents Department
open access

Heat exchanger-ingot casting/slicing process. Silicon sheet growth development for the large area silicon sheet task of the Low Cost Silicon Solar Array Project. Sixth quarterly progress report, December 17, 1976--March 21, 1977

Description: Efforts in crystal casting during this quarter were directed towards developing a crucible to prevent cracking and establish parameters for achieving the maximum growth rate for single crystal ingot solidification. Emphasis was placed on reducing the furnace superheat to increase growth rate and to cast SiO/sub 2/ liners directly in graphite crucibles. Fast growth rates were achieved by reducing the furnace temperature as close to the melt point as the instrumentation would allow--3/sup 0/C. Good single crystal growth was achieved on top of the seed by this technique, but the periphery of the seed was too cool to seed single crystal growth. Ingots were quenched from 1000/sup 0/C with helium to shatter the crucible; this did not prevent cracking of the ingot. Low density fused silica bodies were fabricated. The wetting characteristics of liquid silicon in a vacuum atmosphere was sufficient to cause penetration into open paths such as cracks and voids. Slicing tests were performed to determine: (1) the effectiveness of grooved support rollers in reducing blade wander, (2) the effectiveness of slow, nonsynchronous and stationary workpiece motions on slicing performance; and (3) the performance and life of diamond plated tungsten wire. With grooved rollers positioned on either side of the workpiece, blade wander and wafer taper were reduced an order of magnitude. For a stationary workpiece, twice the blade force was required to obtain cutting rates comparable with rocked workpieces. This resulted in wire breakage, deterioration of cutting rate, and waviness of wafer surfaces. Slow non-synchronous rocking of the workpiece dramatically improved the surface quality. Wafers could be sliced at 0.2 lb., 90 gm, instead of 0.15 lb., 68 gm, force per wire and still produce high surface quality.
Date: March 31, 1977
Creator: Schmid, F.
Partner: UNT Libraries Government Documents Department
open access

Lepton pair production and the modified Drell--Yan mechanism in high energy unpolarized and polarized pp and antipp collisions

Description: A modified Drell-Yan mechanism for the inclusive dilepton pair production in hadronic reactions is studied, and the significance of comparing high energy unpolarized and polarized pp and anti pp collisions is discussed. The required beams are currently in proposal at FNAL and CERN.
Date: March 31, 1977
Creator: Chen, C. K.
Partner: UNT Libraries Government Documents Department
open access

Multiflash feed-and-bleed coupling for the evaporation and crystallization industry. Technical report, January 1-March 31, 1977

Description: The following are discussed: each of the three candidate industries (preserved fruits and vegetables, sugar and confectionary products, and chemicals) and how they were chosen; other industries that might use geothermal brine in their evaporation/crystallization operations; contacts made with people in these industries, and with manufacturers of evaporators and crystallizers; modifications made in the evaporator heat and material balance computer program; and work being done on well/pipeline economics and the information available for this analysis. (MHR)
Date: March 31, 1977
Creator: Basuino, D. J.; Doyle, P. T. & May, S. C.
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Fort Worth press]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 31, 1977, 6:00 p.m.
Duration: 1 minute 15 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Parkland Nurse]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 31, 1977, 10:00 p.m.
Duration: 2 minutes 08 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: People Mover]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 31, 1977, 6:00 p.m.
Duration: 2 minutes 15 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Railroad (Women Working)]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 31, 1977, 10:00 p.m.
Duration: 2 minutes 02 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
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