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1,279 Matching Results
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NCSX Plasma Heating Methods
The NCSX (National Compact Stellarator Experiment) has been designed to accommodate a variety of heating systems, including ohmic heating, neutral-beam injection, and radio-frequency. Neutral beams will provide one of the primary heating methods for NCSX. In addition to plasma heating, beams are also expected to provide a means for external control over the level of toroidal plasma rotation velocity and its profile. The plan is to provide 3 MW of 50 keV balanced neutral-beam tangential injection with pulse lengths of 500 msec for initial experiments, and to be upgradeable to pulse lengths of 1.5 sec. Subsequent upgrades will add 3 MW of neutral-beam injection. This Chapter discusses the NCSX neutral-beam injection requirements and design issues, and shows how these are provided by the candidate PBX-M (Princeton Beta Experiment-Modification) neutral-beam injection system. In addition, estimations are given for beam-heating efficiencies, scaling of heating efficiency with machine size an d magnetic field level, parameter studies of the optimum beam-injection tangency radius and toroidal injection location, and loss patterns of beam ions on the vacuum chamber wall to assist placement of wall armor and for minimizing the generation of impurities by the energetic beam ions. Finally, subsequent upgrades could add an additional 6 …
Date:
February 28, 2003
Creator:
Kugel, H.W.; Spong, D.; Majeski, R. & Zarnstorff, M.
Object Type:
Report
System:
The UNT Digital Library
COMMISSIONING OF RHIC DEUTERON - GOLD COLLISIONS.
Deuteron and gold beams have been accelerated to a collision energy of {radical}s = 200 GeV/u in the Relativistic Heavy Ion Collider (RHIC), providing the first asymmetric-species collisions of this complex. Necessary changes for this mode of operation include new ramping software and asymmetric crossing angle geometries. This paper reviews machine performance, problem encountered and their solutions, and accomplishments during the 16 weeks of ramp-up and operations.
Date:
May 12, 2003
Creator:
SATOGATA,T. AHRENS,L. BAI,M. BEEBE-WANG,J.
Object Type:
Article
System:
The UNT Digital Library
Geochemical and Isotopic Interpretations of Groundwater Flow in the Oasis Valley Flow System, Southern Nevada
This report summarizes the findings of a geochemical investigation of the Pahute Mesa-Oasis Valley groundwater flow system in southwestern Nevada. It is intended to provide geochemical data and interpretations in support of flow and contaminant transport modeling for the Western and Central Pahute Mesa Corrective Action Units.
Date:
January 8, 2003
Creator:
Thomas, J. M.; Benedict Jr., F. C.; Rose, T. P.; Hershey, R. L.; Paces, J. B.; Peterman, Z. E. et al.
Object Type:
Report
System:
The UNT Digital Library
Developments in Pursuit of a Micro-Optic Gyroscope
Rotation sensors (gyros) and accelerometers are essential components for all precision-guided weapons and autonomous mobile surveillance platforms. MEMS gyro development has been based primarily on the properties of moving mass to sense rotation and has failed to keep pace with the concurrent development of MEMS accelerometers because the reduction of size and therefore mass is substantially more detrimental to the performance of gyros than to accelerometers. A small ({approx}0.2 cu in), robust ({approx}20,000g), inexpensive ({approx}$500), tactical grade performance ({approx}10-20 deg/hr.) gyro is vital for the successful implementation of the next generation of ''smart'' weapons and surveillance apparatus. The range of applications (relevant to Sandia's mission) that are substantially enhanced in capability or enabled by the availability of a gyro possessing the above attributes includes nuclear weapon guidance, fuzing, and safing; synthetic aperture radar (SAR) motion compensation; autonomous air and ground vehicles; gun-launched munitions; satellite control; and personnel tracking. For example, a gyro of this capability would open for consideration more fuzing options for earth-penetration weapons. The MEMS gyros currently available are lacking in one or more of the aforementioned attributes. An integrated optical gyro, however, possesses the potential of achieving all desired attributes. Optical gyros use the properties of light …
Date:
March 1, 2003
Creator:
VAWTER, GREGORY A.; ZUBRZYCKI, WALTER J.; PEAKE, GREGORY M.; ALFORD, CHARLES; HARGETT, TERRY; SALTERS, BETTY et al.
Object Type:
Report
System:
The UNT Digital Library
Hanford Site Groundwater Monitoring for Fiscal Year 2002
This report presents the results of groundwater and vadose zone monitoring and remediation for fiscal year 2002 on the U.S. Department of Energy's Hanford Site in Washington State. This report is written to meet the requirements in CERCLA, RCRA, the Atomic Energy Act of 1954, and Washington State Administrative Code.
Date:
February 28, 2003
Creator:
Hartman, Mary J.; Morasch, Launa F. & Webber, William D.
Object Type:
Report
System:
The UNT Digital Library
Vadose Zone Transport Field Study: FY 2002 Status Report
This work reported here is part of the U. S. Department of Energy’s Science and Technology Initiative to develop improved conceptual models of flow and transport in the vadose zone, particularly for the Hanford Site, Washington. The National Academy of Sciences has identified significant knowledge gaps in conceptual model development as one reason for discovery of subsurface contamination in unexpected places. Inadequate conceptualizations limits, not only the understanding of long-term fate and transport, but also the selection and design of remediation technologies. Current conceptual models are limited partly because they do not account for the random heterogeneity that occurs under the extremes of very nonlinear flow behavior typical of the Hanford vadose zone. A major improvement in conceptual modeling of the Hanford vadose zone includes a better understanding and description of soil anisotropy, a property that appears to control much of the subsurface flow and transport in layered sediments at the Hanford Site.
Date:
January 2, 2003
Creator:
Ward, Anderson L.; Gee, Glendon W.; Zhang, Z. F. & Keller, Jason M.
Object Type:
Report
System:
The UNT Digital Library
The Murmansk Initiative-RF: Completion
The Murmansk Initiative-RF (MI) was conceived to provide the Russian Federation (RF) with the capacity to manage low-level liquid radioactive waste (LLRW) and comply with the requirements of the London Convention that prohibit ocean dumping of these wastes. The Initiative, under a trilateral agreement begun in 1994/95, has upgraded an existing low-level liquid radioactive waste treatment facility, increased its capacity from 1,200 m3 /year to 5,000 m3 /year, and expanded the capability of the facility to treat liquids containing salt (up to 20 g/L). The three parties to the agreement, the Russian Federation, Norway, and the United States, have split the costs for the project. It was the first project of its kind to utilize exclusively Russian subcontractors in the upgrade and expansion of the LLRW treatment plant on the premises of FGUP Atomflot (now FGUP Atomflot) in Murmansk, Russia. The project advanced into the test-operation phase. These start-up activities have include d processing of actual radioactive liquid waste from the Arctic icebreaker fleet, and incorporation of these wastes into a cementation process of Russian design. Initial runs have revealed that procedures for unloading spent ion-exchange sorbents need to be improved and that sludges formed during removal of alkaline-earth metals …
Date:
February 24, 2003
Creator:
Czajkowski, C.; Wester, D. W.; Dyer, R. S.; Sorlie, A. A. & Moller, B.
Object Type:
Article
System:
The UNT Digital Library
Model Documentation for the MiniCAM
The MiniCAM, short for the Mini-Climate Assessment Model, is an integrated assessment model of moderate complexity focused on energy and agriculture sectors. The model produces emissions of greenhouse gases (carbon dioxide, methane and nitrous oxide) and other radiatively important substances such as sulfur dioxide. Through incorporation of the simple climate model MAGICC, the consequences of these emissions for climate change and sea-level rise can be examined. The MiniCAM is designed to be fast and flexible.
Date:
July 17, 2003
Creator:
Brenkert, Antoinette L.; Smith, Steven J.; Kim, Son H. & Pitcher, Hugh M.
Object Type:
Report
System:
The UNT Digital Library
Military Ecological Risk Assessment Framework (MERAF) for Assessment of Risks of Military Training and Testing to Natural Resources
The objective of this research is to provide the DoD with a framework based on a systematic, risk-based approach to assess impacts for management of natural resources in an ecosystem context. This risk assessment framework is consistent with, but extends beyond, the EPA's ecological risk assessment framework, and specifically addresses DoD activities and management needs. MERAF is intended to be consistent with existing procedures for environmental assessment and planning with DoD testing and training. The intention is to supplement these procedures rather than creating new procedural requirements. MERAF is suitable for use for training and testing area assessment and management. It does not include human health risks nor does it address specific permitting or compliance requirements, although it may be useful in some of these cases. Use of MERAF fits into the National Environmental Policy Act (NEPA) process by providing a consistent and rigorous way of organizing and conducting the technical analysis for Environmental Impact Statements (EISs) (Sigal 1993; Carpenter 1995; Canter and Sadler 1997). It neither conflicts with, nor replaces, procedural requirements within the NEPA process or document management processes already in place within DoD.
Date:
June 18, 2003
Creator:
Suter, Glenn W., II; Reinbold, Ketarah A.; Rose, Winifred H. & Chawla, Manroop K.
Object Type:
Report
System:
The UNT Digital Library
Bulletin of the Texas Archeological Society, Volume 74, 2003
Annual journal of the Texas Archeological Society documenting research and findings of members as well as activities of the organization.
Date:
2003
Creator:
Texas Archeological Society
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Hanford Site National Environmental Policy Act (NEPA) Characterization, Revision 15
This document describes the U.S. Department of Energy's (DOE) Hanford Site environment. It is updated each year and is intended to provide a consistent description of the Hanford Site environment for the many National Environmental Policy Act (NEPA) documents being prepared by DOE contractors. No statements of significance or environmental consequences are provided. This year's report is the thirteenth revision of the original document published in 1988 and is (until replaced by the fourteenth revision) the only version that is relevant for use in the preparation of Hanford NEPA, State Environmental Policy Act (SEPA), and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) documents. The two chapters included in this document (Chapters 4 and 6) are numbered to correspond to the chapters where such information is typically presented in environmental impact statements (Weiss) and other Hanford Site NEPA or CERCLA documentation. Chapter 4.0 (Affected Environment) describes Hanford Site climate and meteorology, geology, hydrology, ecology, cultural, archaeological, and historical resources, socioeconomics, occupational safety, and noise. Chapter 6.0 (Statutory and Regulatory Requirements) describes federal and state laws and regulations, DOE directives and permits, and presidential executive orders that are applicable to the NEPA documents prepared for Hanford Site activities.
Date:
September 1, 2003
Creator:
Neitzel, Duane A.; Bunn, Amoret L.; Burk, Kenneth W.; Cannon, Sandra D.; Duncan, Joanne P.; Fowler, Richard A. et al.
Object Type:
Report
System:
The UNT Digital Library
Chem-prep PZT95/5 for neutron generator applications : the effect of pore former type and density on the depoling behavior of chemically prepared PZT 95/5 ceramics.
The hydrostatically induced ferroelectric(FE)-to-antiferroelectric(AFE) phase transformation for chemically prepared niobium modified PZT 95/5 ceramics was studied as a function of density and pore former type (Lucite or Avicel). Special attention was placed on the effect of different pore formers on the charge release behavior associated with the FE-to-AFE phase transformation. Within the same density range (7.26 g/cm3 to 7.44 g/cm3), results showed that ceramics prepared with Lucite pore former exhibit a higher bulk modulus and a sharper polarization release behavior than those prepared with Avicel. In addition, the average transformation pressure was 10.7% greater and the amount of polarization released was 2.1% higher for ceramics with Lucite pore former. The increased transformation pressure was attributed to the increase of bulk modulus associated with Lucite pore former. Data indicated that a minimum volumetric transformational strain of -0.42% was required to trigger the hydrostatically induced FE-to-AFE phase transformation. This work has important implications for increasing the high temperature charge output for neutron generator power supply units.
Date:
October 1, 2003
Creator:
Lockwood, Steven John; Scofield, Timothy W.; Yang, Pin; Voigt, James A.; Tuttle, Bruce Andrew & Moore, Roger Howard
Object Type:
Report
System:
The UNT Digital Library
Hydrologic Characterization Using Vadose Zone Monitoring Tools: Status Report
Hydrologic characterization of the vadose zone (from soil surface to the underlying water table) is needed to assess contaminant migration from buried wastes. The Pacific Northwest National Laboratory, under contract with the U. S. Department of Energy's EM-50 (Subsurface Contamination Focus Area), and in collaboration with CH2MHILL Hanford Group, the Idaho National Engineering and Environmental Laboratory (INEEL), and Duratek Federal Services (DFS), deployed a suite of vadose-zone instruments at the Hanford Site near Richland, Washington. Several new instruments were tested.
Date:
February 1, 2003
Creator:
Gee, Glendon W.; Ward, Anderson L.; Sisson, James B.; Hubbell, Joel M.; Myers, David A. & Sydnor, Harold A.
Object Type:
Report
System:
The UNT Digital Library
Chem-Prep PZT 95/5 for Neutron Generator Applications: Powder Fractionation Study of Production-Scale Powders
The Materials Chemistry Department 1846 has developed a lab-scale chem-prep process for the synthesis of PNZT 95/5, referred to as the ''SP'' process (Sandia Process). This process (TSP) has been successfully transferred to and scaled-up by Department 14192 (Ceramics and Glass Department), producing the larger quantities of PZT powder required to meet the future supply needs of Sandia for neutron generator production. The particle size distributions of TSP powders routinely have been found to contain a large particle size fraction that was absent in development (SP) powders. This SAND report documents experimental studies focused on characterizing these particles and assessing their potential impact on material performance. To characterize these larger particles, fractionation of several TSP powders was performed. The ''large particle size fractions'' obtained were characterized by particle size analysis, SEM, and ICP analysis and incorporated into compacts and sintered. Large particles were found to be very similar in structure and composition as the bulk of the powder. Studies showed that the large-size fractions of the powders behave similarly to the non-fractionated powder with respect to the types of microstructural features once sintered. Powders were also compared that were prepared using different post-synthesis processing (i.e. differences in precipitate drying). Results …
Date:
June 1, 2003
Creator:
MOORE, DIANA L.; VOIGT, JAMES A.; WATSON, CHAD S.; MCKENZIE, BONNIE B.; MOORE, ROGER H.; HUTCHINSON, MICHAEL A. et al.
Object Type:
Report
System:
The UNT Digital Library
FEASIBILITY ANALYSIS FOR INSTALLING A CIRCULATING FLUIDIZED BED BOILER FOR COFIRING MULTIPLE BIOFUELS AND OTHER WASTES WITH COAL AT PENN STATE UNIVERSITY
The Pennsylvania State University, utilizing funds furnished by the U.S. Department of Energy's Biomass Power Program, investigated the installation of a state-of-the-art circulating fluidized bed boiler at Penn State's University Park campus for cofiring multiple biofuels and other wastes with coal, and developing a test program to evaluate cofiring biofuels and coal-based feedstocks. The study was performed using a team that included personnel from Penn State's Energy Institute, Office of Physical Plant, and College of Agricultural Sciences; Foster Wheeler Energy Services, Inc.; Foster Wheeler Energy Corporation; Parsons Energy and Chemicals Group, Inc.; and Cofiring Alternatives. The activities included assessing potential feedstocks at the University Park campus and surrounding region with an emphasis on biomass materials, collecting and analyzing potential feedstocks, assessing agglomeration, deposition, and corrosion tendencies, identifying the optimum location for the boiler system through an internal site selection process, performing a three circulating fluidized bed (CFB) boiler design and a 15-year boiler plant transition plan, determining the costs associated with installing the boiler system, developing a preliminary test program, determining the associated costs for the test program, and exploring potential emissions credits when using the biomass CFB boiler.
Date:
March 26, 2003
Creator:
Miller, Bruce G.; Miller, Sharon Falcone; Cooper, Robert; Gaudlip, John; Lapinsky, Matthew; McLaren, Rhett et al.
Object Type:
Report
System:
The UNT Digital Library
Journal of the House of Representatives of the Regular Session of the Seventy-Eighth Legislature of the State of Texas, Volume 1
The Journal contains the proceedings of the House of Representatives of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials.
Date:
2003
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Journal of the Senate, Regular Session of the Seventy-Eighth Legislature of the State of Texas, Volume 1
The Journal contains the proceedings of the Senate of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials.
Date:
2003
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
Journal of the Senate, Regular Session of the Seventy-Eighth Legislature of the State of Texas, Volume 2
The Journal contains the proceedings of the Senate of Texas including legislation, reports, discussions, votes, and points-of-order. Some volumes also contain supplementary materials.
Date:
2003
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
Texas Journal of Rural Health, Volume 21, Number 3, 2003
Quarterly journal containing articles, field notes, research, reviews, and other analyses of rural health in Texas.
Date:
2003
Creator:
Texas Tech University Health Sciences Center
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Photoproduction of the K+ K0-(1750)
While photoproduction has often been advertised as an important environment in which to study light meson spectroscopy, solid experimental results are sparse. In fact, beyond the relatively straightforward photoproduction of the {rho}, {omega}, and {phi} mesons, the few results of exclusive photoproduction that do exist are poorly understood, and several, perhaps, have even been misinterpreted. After extensively reviewing the sometimes tenuous history of the exclusive photoproduction of the ''{rho}{sup 1}(1600)'', the ''{omega}{pi}{sup 0}(1250)'', the ''{omega}(1650)'', and the ''K{sup +}K{sup -}(1750)'', new results from the E831/FOCUS photoproduction experiment at Fermilab are presented which address the interpretation of the K{sup +}K{sup -}(1750). This enhancement in low-p{sub T} K{sup +}K{sup -} pairs at a mass near 1750 MeV/c{sup 2} has been observed by several previous photoproduction experiments, but, despite several apparent inconsistencies, it has always been interpreted as the J{sup PC} = 1{sup --} {phi}(1680) meson. With nearly two orders of magnitude more events than any previous observation of the K{sup +}K{sup -}(1750), and based on precise measurements of its mass and width, and its absence from the K*K final state, the FOCUS data can finally render this interpretation implausible. In addition, several steps have been taken towards establishing a new interpretation. Based …
Date:
January 1, 2003
Creator:
Mitchell, Ryan Edward & U., /Tennessee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Results of Performance Evaluation Testing of Electrical Leak-Detection Methods at the Hanford Mock Tank Site--FY 2002-2003
Application of two electrical resistivity methods at the Hanford Site Mock Tank during 2002, indicate the viability of the methods as possible leak-detection tools for SST retrieval operations. Electrical Resistivity Tomography and High-Resolution Resistivity were used over a 109-day period to detect leakage of a waste simulant beneath the tank. The results of the test indicate that both of these two methods, and subset methods may be applicable to SST leak detection.
Date:
February 1, 2003
Creator:
Barnett, D. Brent; Gee, Glendon W.; Sweeney, Mark D.; Johnson, Michael D.; Medina, Victor F.; Mendoza, Donaldo P. et al.
Object Type:
Report
System:
The UNT Digital Library
Journal of the House of Representatives of the Regular Session of the Seventy-Eighth Legislature of the State of Texas, Volume 7
This volume of the Journal contains an index to the proceedings of the regular legislative session.
Date:
2003
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Journal of the House of Representatives of the Regular Session of the Seventy-Eighth Legislature of the State of Texas, Volume 6
This volume of the Journal contains the appendix to the proceedings of the regular legislative session. The appendix includes the history of bills and resolutions passed by the Texas House of Representatives and the Senate and information about the authors of legislation.
Date:
2003
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Chemistry and Materials Science, A Collection of Articles from Science & Technology Review
None
Date:
February 5, 2003
Creator:
Diaz de la Rubia, T
Object Type:
Report
System:
The UNT Digital Library