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188
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23
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Dynamic Strain on Thin Diaphragms of a Mercury Target During 800-MeV Proton Thermal Shock Tests
Extrinsic Fabry-Perot Interferometric fiber optic sensors were used to measure dynamic strains on thin diaphragms of a liquid mercury target, which was subjected to intense 800-MeV proton thermal shock tests. The mercury target is engineered with very thin end plates or diaphragms (either 0.6 mm or 1.9 mm) for studying large strain effects. During thermal shock tests, the mercury in the target interacted with an intense pulsed beam of 2.4x10{sup 13 protons}. The resulting pressure waves lead to large strains exceeding 250 microstrains on a 0.6-mm diaphragm. Significant factors relative to the accuracy of strain measurements are emphasized, such as the sensor air gap, alignment of sensors, and frequency response of the strain instrument. In this paper, dynamic strains measured on thin diaphragms are described and discussed.
Date:
November 13, 1999
Creator:
Allison, S. W.; Andriulli, J. B.; Cates, M. R.; Earl, D. D.; Haines, J. R.; Morrissey, F. X. et al.
Object Type:
Article
System:
The UNT Digital Library
Accomplishments of the Abacc-Doe Cooperation Program
None
Date:
November 1, 1999
Creator:
Almeida, G. L. De; Palhares, L. & Al, Et
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 1999-11-10 - UNT African Percussion Ensemble
Access:
Use of this item is restricted to the UNT Community
Ensemble recital performed at the UNT College of Music.
Date:
November 16, 1999
Creator:
Alorwoyie, Gideon Foli
Object Type:
Sound
System:
The UNT Digital Library
Safety Analyses at the Idaho National Engineering and Environmental Laboratory Test Reactor Area - Past to Present
Test reactors are unique in that the core configuration may change with each operating interval. The process of safety analyses for test reactors at the Idaho National Engineering and Environmental Test Reactor Area has evolved as the computing capabilities, software, and regulatory requirements have changed. The evaluations for experiments and the reactor have moved from measurements in a set configuration and then application to other configurations with a relatively large error to modeling in three-dimensions and explicit analyses for each experiment and operating interval. This evolution is briefly discussed for the Test Reactor Area.
Date:
November 1, 1999
Creator:
Ambrosek, Richard Garry & Ingram, Frederick William
Object Type:
Article
System:
The UNT Digital Library
Southwest Retort, Volume 52, Number 3, November 1999
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
November 1999
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 25, Number 4, Winter 1999
Newsletter of the Texas Chapter of the American Fisheries Society containing information about the organization, membership, and field of aquaculture and ecosystem management.
Date:
November 1999
Creator:
American Fisheries Society. Texas Chapter.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
National Geoscience Data Repository System, Phase III: Implementation and Operation of the Repository
The NGDRS steering committee met at Unocal's offices on October 1, 1998 in Sugar Land, Texas to review and discuss issues of data transfer and the continued development of the Stapleton prospect for establishment of a national core repository. Company representatives reaffirmed their commitment to donate geoscience data to the NGDRS once appropriate facilities are available.
Date:
November 9, 1999
Creator:
American Geological Institute
Object Type:
Report
System:
The UNT Digital Library
The Tracings, Volume 17, Number 2, November 1999
Newsletter of the the Anderson County Genealogical Society containing genealogical information such as generation charts, family histories, and lists of records (births, deaths, church records, etc.).
Date:
November 1999
Creator:
Anderson County Genealogical Society
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
ULTRA HIGH EFFICIENCY ESP DEVELOPMENT FOR AIR TOXICS CONTROL
Because more than 90 percent of U.S. coal-fired utility boilers are equipped with electrostatic precipitators (ESPs), retrofitable ESP technologies represent a logical approach towards achieving the Department of Energy's (DOE) goal of a major reduction in fine particulate and mercury emissions (air toxics) from coal based power systems. EPA's recent issuance of significantly tightened ambient air standards for particles smaller than 2.5 {micro}m (PM{sub 2.5}) creates a new urgency for developing cost-effective means to control fine particulate emissions. This challenge is compounded by the on-going switch in the utility industry to low-sulfur Powder River Basin (PRB) coals, that generate higher resistivity and difficult-to-collect fly ash. Particulate emissions can increase by a factor of ten when a utility switches to a low-sulfur coal. Numerous power plants are presently limited in operation by the inability of their ESPs to control opacity at high loads. In Phase I of this program, ABB investigated five technologies to improve the collection of fine particulate and trace metals in ESPs. These included: (1) flue-gas cooling, (2) flue-gas humidification, (3) pulsed energization, (4) wet ESP and precharger modules, and (5) sorbent injection for mercury control. Tests were conducted with an Eastern bituminous coal and a Powder River …
Date:
November 1, 1999
Creator:
Anderson, David K.
Object Type:
Report
System:
The UNT Digital Library
Landscapes and Dynamics of Proteins
None
Date:
November 1, 1999
Creator:
Anderson, N.; Berendzen, J. & AL, ET
Object Type:
Report
System:
The UNT Digital Library
Optimized Baking of the DIII-D Vessel
The DIII-D tokamak vacuum vessel baking system is used to heat the vessel walls and internal hardware to an average temperature of 350 C to allow rapid conditioning of the vacuum surfaces. The system combines inductive heating and a circulating hot air system to provide rapid heating with temperature uniformity required by stress considerations. In recent years, the time to reach 350 C had increased from 9 hrs to 14 hrs. To understand and remedy this sluggish heating rate, an evaluation of the baking system was recently performed. The evaluation indicated that the mass of additional in-vessel hardware (50% increase in mass) was primarily responsible. This paper reports on this analysis and the results of the addition of an electric air heater and procedural changes that have been implemented. Preliminary results indicate that the time to 350 C has been decreased to 4.5 hours and the temperature uniformity has improved.
Date:
November 1, 1999
Creator:
Anderson, P. M. & Kellman, A. G.
Object Type:
Article
System:
The UNT Digital Library
New Pellet Injection Schemes on DIII-D
The pellet fueling system on DIII-D has been modified for injection of deuterium pellets from two vertical ports and two inner wall locations on the magnetic high-field side (HFS) of the tokamak. The HFS pellet injection technique was first employed on ASDEX-Upgrade with significant improvements reported in both pellet penetration and fueling efficiency. The new pellet injection schemes on DIII-D required the installation of new guide tubes. These lines are {approx_equal}12.5 m in total length and are made up of complex bends and turns (''roller coaster'' like) to route pellets from the injector to the plasma, including sections inside the torus. The pellet speed at which intact pellets can survive through the curved guide tubes is limited ({approx_equal}200-300 m/s for HFS injection schemes). Thus, one of the three gas guns on the injector was modified to provide pellets in a lower speed regime than the original guns (normal speed range {approx_equal}500 to 1000 m/s). The guide tube installations and gun modifications are described along with the injector operating parameters, and the latest test results are highlighted.
Date:
November 13, 1999
Creator:
Anderson, P. M.; Baylor, L. R.; Combs, S. K.; Foust, C. R.; Jernigan, T. C. & Robinson, J. I.
Object Type:
Article
System:
The UNT Digital Library
Advanced power generation systems for the 21st Century: Market survey and recommendations for a design philosophy
The purpose of this report is to document the results of a study designed to enhance the performance of future military generator sets (gen-sets) in the medium power range. The study includes a market survey of the state of the art in several key component areas and recommendations comprising a design philosophy for future military gen-sets. The market survey revealed that the commercial market is in a state of flux, but it is currently or will soon be capable of providing the technologies recommended here in a cost-effective manner. The recommendations, if implemented, should result in future power generation systems that are much more functional than today's gen-sets. The number of differing units necessary (both family sizes and frequency modes) to cover the medium power range would be decreased significantly, while the weight and volume of each unit would decrease, improving the transportability of the power source. Improved fuel economy and overall performance would result from more effective utilization of the prime mover in the generator. The units would allow for more flexibility and control, improved reliability, and more effective power management in the field.
Date:
November 1999
Creator:
Andriulli, J. B.; Gates, A. E.; Haynes, H. D.; Klett, L. B.; Matthews, S. N.; Nawrocki, E. A. et al.
Object Type:
Report
System:
The UNT Digital Library
TRIGA FUEL PHASE I AND II CRITICALITY CALCULATION
The purpose of this calculation is to characterize the criticality aspect of the codisposal of TRIGA (Training, Research, Isotopes, General Atomic) reactor spent nuclear fuel (SNF) with Savannah River Site (SRS) high-level waste (HLW). The TRIGA SNF is loaded into a Department of Energy (DOE) standardized SNF canister which is centrally positioned inside a five-canister defense SRS HLW waste package (WP). The objective of the calculation is to investigate the criticality issues for the WP containing the five SRS HLW and DOE SNF canisters in various stages of degradation. This calculation will support the analysis that will be performed to demonstrate the viability of the codisposal concept for the Monitored Geologic Repository (MGR).
Date:
November 23, 1999
Creator:
Angers, L.
Object Type:
Report
System:
The UNT Digital Library
Helicon Plasma Source Configuration Analysis by Means of Density Measurements
Initial results have been obtained from operation of a helicon plasma source built to conduct optimization studies for space propulsion applications. The source features an easily reconfigurable antenna to test different geometries. Operating with He as the source gas, peak densities >= 1.6X10{sup 19} m{sup -3} have been achieved. Radial and axial plasma profiles have been obtained using a microwave interferometer that can be scanned axially and a Langmuir probe. The source will be used to investigate operation at high magnetic field, frequency, and input power.
Date:
November 13, 1999
Creator:
Angrilli, F.; Barber, G. C.; Carter, M. D.; Goulding, R. H.; Maggiora, R.; Pavarin, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Productivity and Injectivity of Horizontal Wells
This quarterly report is based on the last activity above. It gives a brief account of the work and the complete study will be included in the next Annual Report of the project.
Date:
November 8, 1999
Creator:
Arababi, Sepehr; Aziz, Khalid; Hayashida, Yasuyuki & Hewett, Thomas
Object Type:
Report
System:
The UNT Digital Library
Productivity and Injectivity of Horizontal Wells
The work on modeling hydraulically fractured horizontal wells has moved forward. A literature review on the subject was done and some of the existing models have been coded and applied to example problems for evaluation purposes. Previous work on the elects of heterogeneities on the performance of horizontal wells was continued by conducting a sensitivity study on various parameters that were kept constant in the earlier study. For example, we have studied the elect of gas cap and aquifer size, well location, fluid viscosity, etc. The experimental work on using horizontal wells as injectors and producers in a gas injection gravity drainage process continued. New and repeat experiments were conducted. Work on streamline grids was advanced by considering example problems with highly distorted grids which cannot be directly used for flow simulation. Grid smoothing and domain mapping techniques were investigated to handle such situations. A technique was developed for the computation o f well index with consideration to wellbore pressure drop. A recently developed reservoir/wellbore coupling model was used for this purpose.
Date:
November 8, 1999
Creator:
Arbabi, Sepehr; Aziz, Khalid; Hewett, Thomas A. & Smith, Marilyn
Object Type:
Report
System:
The UNT Digital Library
Abner Norman Statue
Photograph of a statue of Abner Norman, founder of Norman, OK.
Date:
November 3, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Abner Norman Statue
Photograph of a statue of Abner Norman, founder of Norman, OK.
Date:
November 3, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Downtown Edmond
Photograph of a scene in Downtown Edmond.
Date:
November 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Downtown Edmond
Photograph of a scene in Downtown Edmond.
Date:
November 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Downtown Edmond
Photograph of a scene in Downtown Edmond.
Date:
November 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Downtown Edmond
Photograph of a scene in Downtown Edmond.
Date:
November 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Downtown Edmond
Photograph of a scene in Downtown Edmond.
Date:
November 2, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History