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0.52eV Quaternary InGaAsSb Thermophotovoltaic Diode Technology
Thermophotovoltaic (TPV) diodes fabricated from 0.52eV lattice-matched InGaAsSb alloys are grown by Metal Organic Vapor Phase Epitaxy (MOVPE) on GaSb substrates. 4cm{sup 2} multi-chip diode modules with front-surface spectral filters were tested in a vacuum cavity and attained measured efficiency and power density of 19% and 0.58 W/cm{sup 2} respectively at operating at temperatures of T{sub radiator} = 950 C and T{sub diode} = 27 C. Device modeling and minority carrier lifetime measurements of double heterostructure lifetime specimens indicate that diode conversion efficiency is limited predominantly by interface recombination and photon energy loss to the GaSb substrate and back ohmic contact. Recent improvements to the diode include lattice-matched p-type AlGaAsSb passivating layers with interface recombination velocities less than 100 cm/s and new processing techniques enabling thinned substrates and back surface reflectors. Modeling predictions of these improvements to the diode architecture indicate that conversion efficiencies from 27-30% and {approx}0.85 W/cm{sup 2} could be attained under the above operating temperatures.
Date:
June 9, 2004
Creator:
Dashiell, M. W.; Beausang, J. F.; Nichols, G.; Depoy, D. M.; Danielson, L. R.; Ehsani, H. et al.
System:
The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming
The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date:
September 9, 2002
Creator:
La Pointe, Paul R. & Hermanson, Jan
System:
The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming
The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date:
September 9, 2002
Creator:
Pointe, La; Paul; Parney, Robert; Eiben, Thorsten; Dunleavy, Mike & Whitney, John
System:
The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming
The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date:
September 9, 2002
Creator:
La Pointe, Paul; Parney, Robert; Eiben, Thorsten; Dunleavy, Mike; Whitney, John & Eubanks, Darrel
System:
The UNT Digital Library
3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming
The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.
Date:
September 9, 2002
Creator:
La Pointe, Paul R.; Hermanson, Jan & Eiben, Thorsten
System:
The UNT Digital Library
3-D Seismic Exploration Project, Ute Indian Tribe, Uintah and Ouray Reservation, Uintah County, Utah
The objectives of this North Hill Creek 3-D seismic survey were to: (1) cover as large an area as possible with available budget; (2) obtain high quality data throughout the depth range of the prospective geologic formations of 2,000' to 12,000' to image both gross structures and more subtle structural and stratigraphic elements; (3) overcome the challenges posed by a hard, reflective sandstone that cropped out or was buried just a few feet below the surface under most of the survey area; and (4) run a safe survey.
Date:
September 9, 2002
Creator:
Eckels, Marc T.
System:
The UNT Digital Library
6.70 EV Resonance in U²³⁸
"Using the Brookhaven fast chopper, transmission curves were obtained for the 6.70 +/- .06 ev resonance in U238 using four different thicknesses of natural uranium metal." The measurements for the transmission curves are summarized in the table provided.
Date:
November 9, 1953
Creator:
Levin, Jules S.
System:
The UNT Digital Library
9/11 Commission Recommendations: A Civil Liberties Oversight Board
Among the recommendations made by the National Commission on Terrorist Attacks Upon the United States (9/11 Commission) in its final report is the creation of a board within the executive branch to oversee adherence to guidelines on, and the commitment to defend, civil liberties by the federal government. This report examines this recommendation and its implications, and will be updated as events warrant.
Date:
August 9, 2004
Creator:
Relyea, Harold C.
System:
The UNT Digital Library
100 Areas: (For Technical Progress Letter No. 109), July 30--August 5
None
Date:
August 9, 1946
Creator:
Jordan, W. E.
System:
The UNT Digital Library
100 Areas technical activities report - physics, September 1946
The Pine unit was down four times during the month. These were all regularly scheduled shutdowns. Times down vary from 16.9 hours to 19.2 hours. A total of 33.4 tons of metal was discharged. The galvano-meter chamber in experimental hole {open_quotes}A{close_quotes} was replaced. One Special Request was discharged and three tubes have been loaded with Special Request samples. A new bismuth column has been established. Some difficulty has been experienced with high temperatures of both tube exit water and graphite following startup. On one occasion the normal operating level was exceeded for a short period of time.
Date:
October 9, 1946
Creator:
Montgomery, E. B.
System:
The UNT Digital Library
100 Areas weekly report, June 9, 1955
None
Date:
June 9, 1955
Creator:
Bellas, H. W.
System:
The UNT Digital Library
105-KE Basin isolation barrier leak rate test analytical development. Revision 1
This document provides an analytical development in support of the proposed leak rate test of the 105-KE Basin. The analytical basis upon which the K-basin leak test results will be used to determine the basin leakage rates is developed in this report. The leakage of the K-Basin isolation barriers under postulated accident conditions will be determined from the test results. There are two fundamental flow regimes that may exist in the postulated K-Basin leakage: viscous laminar and turbulent flow. An analytical development is presented for each flow regime. The basic geometry and nomenclature of the postulated leak paths are denoted.
Date:
May 9, 1995
Creator:
Irwin, J. J.
System:
The UNT Digital Library
200 Area monthly report, August 1966
This report details activities of the 200 Area for the month of August 1966.
Date:
September 9, 1966
Creator:
Christy, J. T.
System:
The UNT Digital Library
200 Area monthly report, July 1966
This report details 200 Area activities for the month of July 1966.
Date:
August 9, 1966
Creator:
Christy, J. T.
System:
The UNT Digital Library
200 Area population weighted X/Q for the public within 10 miles of the site boundary
An overall population weighted atmospheric dispersion coefficient (X/Q) has been calculated for the public within 10 miles of the Hanford Site boundary. The Columbia river was assumed as the Hanford site boundary to the north and the east. The GXQ code was used for the calculation. The value calculated is 1.88 x 10-8 s/m 3.
Date:
July 9, 1996
Creator:
Van Keuren, J.C., Westinghouse Hanford
System:
The UNT Digital Library
200 Area Treated Effluent Disposal Facility operational test specification. Revision 2
This document identifies the test specification and test requirements for the 200 Area Treated Effluent Disposal Facility (200 Area TEDF) operational testing activities. These operational testing activities, when completed, demonstrate the functional, operational and design requirements of the 200 Area TEDF have been met. The technical requirements for operational testing of the 200 Area TEDF are defined by the test requirements presented in Appendix A. These test requirements demonstrate the following: pump station No.1 and associated support equipment operate both automatically and manually; pump station No. 2 and associated support equipment operate both automatically and manually; water is transported through the collection and transfer lines to the disposal ponds with no detectable leakage; the disposal ponds accept flow from the transfer lines with all support equipment operating as designed; and the control systems operate and status the 200 Area TEDF including monitoring of appropriate generator discharge parameters.
Date:
February 9, 1995
Creator:
Crane, A.F.
System:
The UNT Digital Library
234-5 Project, Specification Letter 234-6, 235-6, Revision 1, Waste disposal
This report outlines the general requirements for disposal of wastes from the 234-5 Buildings during the 234-5 Project.
Date:
December 9, 1947
Creator:
Work, J. B.
System:
The UNT Digital Library
234-5 project, specification letter 234-7, 235-7, essential material storage & process solution preparation
This document presents details about the specification for space and equipment requirements for essential material storage and process solution preparation for the 234-5 project.
Date:
December 9, 1947
Creator:
Work, J.B.
System:
The UNT Digital Library
241-SY-101 DACS High hydrogen abort limit reduction (SCR 473) acceptance test report
The capability of the 241-SY-101 Data Acquisition and Control System (DACS) computer system to provide proper control and monitoring of the 241-SY-101 underground storage tank hydrogen monitoring system utilizing the reduced hydrogen abort limit of 0.69% was systematically evaluated by the performance of ATP HNF-4927. This document reports the results of the ATP.
Date:
September 9, 1999
Creator:
ERMI, A.M.
System:
The UNT Digital Library
305 Building cold test facility management plan
This document provides direction for the conduct of business in Building 305 for cold testing K-Basin tools and equipment. The Cold Test Facility represents a small portion of the overall building, and as such, the work instructions already implemented in the 305 Building will be utilized.
Date:
December 9, 1994
Creator:
Feigenbutz, L. V.
System:
The UNT Digital Library
327 Basin Aluminum Corrosion Test
An investigation of corrosion in the 327 Building's water storage basin was made to determine whether the static storage of aluminum jacketed fuel elements could cause corrosion effects that would interfere with studies of in-pile corrosion.
Date:
February 9, 1956
Creator:
Mallett, G. R.
System:
The UNT Digital Library
340 representative sampling verification tank sampling and analysis plan
This Sampling and Analysis Plan contains requirements for characterizing the 340 vault tank 1. The objective of the sampling and characterization is to determine if the tank is homogeneous when agitated and which sampling method provides the most representative sample. A secondary objective is to collect and characterize solid samples.
Date:
September 9, 1996
Creator:
Halgren, D.L., Westinghouse Hanford
System:
The UNT Digital Library
The 1995 Japan-U.S. Auto and Parts Trade Dispute: Terms of the Settlement and Implications
On June 28, 1995, the United States and Japan reached a settlement in a long-running dispute over access to Japan's market for automobiles and parts. 100-percent tariffs by the United States on imports of luxury cars from Japan had been threatened under a Section 301 unfair trade practices case dealing with the aftermarket for autoparts in Japan. This report describes the dispute, the settlement, and questions and issues that still remain.
Date:
August 9, 1995
Creator:
Nanto, Dick K. & Bass, Gwenell L.
System:
The UNT Digital Library
1999 Summer Research Program for High School Juniors at the University of Rochester's Laboratory for Laser Energetics
oak-B202--During the summer of 1999, 12 students from Rochester-area high schools participated in the Laboratory for Laser Energetics' Summer High School Research Program. The goal of this program is to excite a group of high school students about careers in the areas of science and technology by exposing them to research in a state-of-the-art environment. Too often, students are exposed to ''research'' only through classroom laboratories that have prescribed procedures and predictable results. In LLE's summer program, the students experience all of the trials, tribulations, and rewards of scientific research. By participating in research in a real environment, the students often become more enthusiastic about careers in science and technology. In addition, LLE gains from the contributions of the many highly talented students who are attracted to the program. The students spent most of their time working on their individual research projects with members of LLE's technical staff. The projects were related to current research activities at LLE and covered a broad range of areas of interest including laser modeling, diagnostic development, chemistry, liquid crystal devices, and opacity data visualization. The students, their high schools, their LLE supervisors and their project titles are listed in the table. Their written reports …
Date:
October 9, 2002
Creator:
unknown
System:
The UNT Digital Library